Acylation kettle adopting low-temperature sectional reaction

Abstract

The utility model discloses an acylation kettle adopting a low-temperature sectional reaction. Comprising a first reaction kettle, a feeding pipe, a first acylating agent pipe, a first stirring mechanism, a first speed reducer, a first motor, a first jacket, a first refrigerant inlet pipe, a first refrigerant outlet pipe, a heating layer, a first discharging pipe, a first valve, a second reaction kettle, a second acylating agent pipe, a second stirring mechanism, a second speed reducer, a second motor, a second jacket, a second refrigerant inlet pipe, a second refrigerant outlet pipe, a third reaction kettle, a third acylating agent pipe and a third stirring mechanism. And a third speed reducer, a third motor, a third jacket, a third refrigerant inlet pipe, a third refrigerant outlet pipe, a third discharging pipe, a third valve and the like. A sectional type design is adopted, a traditional kettle body is divided into three coherent and independent reaction kettle bodies, under the control of a PLC console, acylation reaction can be sequentially carried out in a first reaction, a second reaction and a third reaction according to preset temperatures of all sections in an ordered and sectional mode, sectional control over the temperatures and sectional proceeding of the reactions are achieved, and the reaction efficiency is improved. The reaction efficiency and the product quality are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of chemical equipment, in particular to an acylation kettle adopting low-temperature segmented reaction. BACKGROUND

[0002] An acylation reaction is a common reaction in organic synthesis, which usually needs to be carried out under certain temperature, pressure and stirring conditions. The traditional acylation reaction kettle usually adopts a single reaction area, and it is difficult to realize the segmented control of temperature, thereby affecting the reaction efficiency and the quality of products. In view of this, the application provides an acylation kettle adopting low-temperature segmented reaction to solve the above problems. CONTENT OF THE INVENTION

[0003] The application provides an acylation kettle adopting low-temperature segmented reaction, which adopts a segmented design, and sets the traditional kettle body into three consecutive and independent reaction kettle bodies. Under the control of a PLC console, the acylation reaction can be sequentially carried out in the first reaction, the second reaction and the third reaction according to the preset temperature of each section, so that the segmented control of temperature and the segmented reaction are realized, and the reaction efficiency and the quality of products are improved.

[0004] The application provides an acylation kettle adopting low-temperature segmented reaction, which comprises: a first reaction, a second reaction and a third reaction, the first reaction comprises a reaction kettle one, the top of the reaction kettle one is provided with a feeding pipe and an acylating agent pipe one, the inside of the reaction kettle one is provided with a stirring mechanism one, the input end of the stirring mechanism one is connected with a speed reducer one penetrating through the top of the reaction kettle one, the input end of the speed reducer one is connected with a motor one, the side wall of the reaction kettle one is wrapped with a jacket one, the input end of the jacket one is connected with a cold medium inlet pipe one, the output end of the jacket one is connected with a cold medium outlet pipe one, the bottom of the reaction kettle one is provided with a heating layer, the bottom of the reaction kettle one is provided with a discharge pipe one in communication with the second reaction through the heating layer, and the discharge pipe one is provided with a valve one;

[0005] The second reaction comprises a reaction kettle two, the top of the reaction kettle two is provided with an acylating agent pipe two, the inside of the reaction kettle two is provided with a stirring mechanism two, the input end of the stirring mechanism two is connected with a speed reducer two penetrating through the top of the reaction kettle two, the input end of the speed reducer two is connected with a motor two, the side wall of the reaction kettle two is wrapped with a jacket two, the input end of the jacket two is connected with a cold medium inlet pipe two, the output end of the jacket two is connected with a cold medium outlet pipe two, the bottom of the reaction kettle two is provided with a discharge pipe two in communication with the third reaction, and the discharge pipe two is provided with a valve two;

[0006] The third reaction includes a reactor three, an acylating agent pipe three is installed at the top of the reactor three, a stirring mechanism three is installed inside the reactor three, a reducer three is connected to the input end of the stirring mechanism three through the top of the reactor three, a motor three is connected to the input end of the reducer three, a jacket three is wrapped around the side wall of the reactor three, a refrigerant inlet pipe three is connected to the input end of the jacket three, a refrigerant outlet pipe three is connected to the output end of the jacket three, a discharge pipe three is installed at the bottom of the reactor three, and a valve three is installed on the discharge pipe three;

[0007] Motor 1, heating layer, valve 1, motor 2, valve 2, motor 3, and valve 3 are all connected to the same PLC control console.

[0008] Furthermore, each of the inner walls of reactor one, reactor two, and reactor three is equipped with a temperature monitoring sensor, all of which are connected to the PLC control console.

[0009] Furthermore, the bottoms of reactor one, reactor two, and reactor three are all conical.

[0010] Furthermore, the interiors of jacket one, jacket two, and jacket three are all "serpentine" channels.

[0011] Furthermore, motor one, motor two, and motor three are all servo motors.

[0012] Furthermore, reducer 1, reducer 2, and reducer 3 are all D-type gearboxes.

[0013] The application provides an acylation kettle adopting low-temperature segmented reaction, which comprises a first reaction, a second reaction and a third reaction, the first reaction comprises a reaction kettle one, a container for the first-stage acylation reaction, the top of the reaction kettle one is provided with a feeding pipe and an acylating agent pipe one, the feeding pipe is a pipeline for injecting reaction raw materials into the reaction kettle one, under the control of a PLC console, a preset amount of reaction raw materials can be injected into the reaction kettle one through the pipeline, the acylating agent pipe one is a pipeline for injecting acylating agents required by the first-stage acylation reaction into the reaction kettle one, under the control of the PLC console, an appropriate amount of acylating agents can be injected into the reaction kettle one through the pipeline, the inside of the reaction kettle one is provided with a stirring mechanism one, which plays a stirring role, under the action of a motor one, the reaction raw materials and the acylating agents participating in the acylation reaction are stirred and mixed at a high speed, so that the reaction raw materials and the acylating agents participating in the acylation reaction are closely contacted and uniformly mixed, thereby improving the reaction efficiency, the input end of the stirring mechanism one penetrates through the top of the reaction kettle one and is connected with a speed reducer one, a kinetic energy processing structure, the output torque of the gear box is improved by using the high-torque characteristic of the gear box, the requirement for the input torque is reduced, thereby reducing the output power of the motor one, so as to save energy, the input end of the speed reducer one is connected with the motor one, a kinetic energy output structure, which provides kinetic energy support for the stirring operation of the stirring mechanism one, the side wall of the reaction kettle one is wrapped with a jacket one, the inside of the jacket one is a "snake tube" channel, under the control of the PLC console, the refrigerant flows through the channel in the side wall of the reaction kettle one, according to the preset temperature, part of the heat generated by the acylation reaction is removed by using the heat exchange principle, so that the inside of the reaction kettle one is in a low-temperature state, thereby ensuring the normal and efficient acylation reaction, reducing the influence of high temperature on the reaction products and ensuring the quality of the reaction products, the input end of the jacket one is connected with a refrigerant inlet pipe one, a pipeline for the refrigerant to enter the inside of the jacket one, the output end of the jacket one is connected with a refrigerant outlet pipe one, a pipeline for the refrigerant to exit the inside of the jacket one, which forms a flow type pipeline with the refrigerant inlet pipe one, thereby efficiently removing the heat in the inside of the reaction kettle one by using the refrigerant, thereby providing strong support for the purpose of cooling, a heating layer is installed at the bottom of the reaction kettle one, which plays a heating role, after the reaction raw materials and the acylating agents are injected, the reaction kettle one is heated, thereby indirectly heating the reaction raw materials and the acylating agent mixture, so that the temperature of the reaction raw materials and the acylating agent mixture reaches the reaction temperature, thereby providing strong support for the initial occurrence of the acylation reaction, the bottom of the reaction kettle one is provided with a discharge pipe one, a discharge channel, after the initial reaction of the reaction raw materials and the acylating agents in the reaction kettle one is completed, the channel is used for entering the second reaction, the discharge pipe one communicates with the second reaction through the heating layer, a valve one is arranged on the discharge pipe one and plays a control role, under the control of the PLC console, the inside channel of the discharge pipe one is controlled to be opened or closed, during the reaction of the reaction raw materials and the acylating agents, the inside channel of the discharge pipe one is closed to prevent leakage, thereby ensuring the normal and efficient first-stage acylation reaction, after the first-stage acylation reaction is completed, the inside channel of the discharge pipe one is opened, so that the initial reaction products enter the reaction kettle two through the discharge pipe one,In order to carry out the second stage acylation reaction in the second reactor, after the discharge is completed, the second batch of reaction raw materials and acylating agent are injected into the first reactor again while the second stage acylation reaction is carried out in the second reactor, so as to achieve the purpose of continuous reaction, thereby improving the production rate.

[0014] The second reaction includes a second reactor, a container for the second stage acylation reaction, and an acylating agent pipe two provided at the top of the second reactor, through which the acylating agent required for the second stage acylation reaction is injected into the second reactor. Under the control of the PLC console, the appropriate amount of acylating agent can be injected into the second reactor through the pipe to ensure the normal progress of the second stage acylation reaction. The second reactor is internally provided with a stirring mechanism two for stirring, which rotates at high speed under the action of the motor two to stir and mix the first stage reaction product and the acylating agent participating in the acylation reaction, so that the first stage reaction product and the acylating agent participating in the acylation reaction are in close contact and uniformly mixed, thereby improving the reaction efficiency. The input end of the stirring mechanism two is connected with a speed reducer two through the top of the second reactor, a kinetic energy processing structure, which uses the high-torque characteristics of the gear box to increase the output torque of the gear box by increasing the speed reduction ratio, thereby reducing the requirement for input torque and reducing the output power of the motor two to achieve the purpose of energy saving. The input end of the speed reducer two is connected with the motor two, a kinetic energy output structure, which provides kinetic energy support for the stirring operation of the stirring mechanism two. The side wall of the second reactor is wrapped with a jacket two, the inside of which is a "snake pipe" channel. Under the control of the PLC console, the refrigerant flows through the channel in the side wall of the second reactor, which can use the heat exchange principle to remove part of the heat generated by the second stage acylation reaction according to the preset temperature, so that the inside of the second reactor is in a low-temperature state to ensure the normal and efficient progress of the second stage acylation reaction, while reducing the impact of high temperature on the reaction product and ensuring the quality of the reaction product. The input end of the jacket two is connected with a refrigerant inlet pipe two, a pipe through which the refrigerant enters the inside of the jacket two. The output end of the jacket two is connected with a refrigerant outlet pipe two, a pipe through which the refrigerant is discharged from the inside of the jacket two, forming a flow-type pipe with the refrigerant inlet pipe two, which provides strong support for removing the heat inside the second reactor using the refrigerant to achieve the purpose of cooling. The bottom of the second reactor is provided with a discharge pipe two, a discharge channel, through which the first stage reaction product and the acylating agent enter the third reaction after the reaction in the second reactor is completed, and communicate with the third reaction. A valve two is provided on the discharge pipe two for control. Under the control of the PLC console, the inside passage of the discharge pipe two is opened and closed. During the reaction of the first stage reaction product and the acylating agent, the inside passage of the discharge pipe two is closed to prevent leakage and ensure the normal and efficient progress of the second stage acylation reaction. After the completion of the second stage acylation reaction, the inside passage of the discharge pipe two is opened to allow the second stage reaction product to enter the third reactor through the discharge pipe two for the third stage acylation reaction in the third reactor. After the discharge is completed, it is closed again. While the third stage acylation reaction is carried out in the third reactor, the next batch of first stage reaction product is allowed to enter the second reactor, so that the next batch of first stage reaction product and the acylating agent carry out the second stage acylation reaction in the second reactor. The next batch of reaction raw materials and acylating agent is injected into the first reactor to achieve the purpose of continuous reaction, thereby improving the production rate.

[0015] The third reaction includes a third reactor, a container for the third stage acylation reaction, and an acylating agent pipe three arranged at the top of the third reactor. The pipe is used to inject the acylating agent required for the third stage acylation reaction into the third reactor. Under the control of the PLC console, the pipe can be used to inject the appropriate amount of acylating agent into the third reactor to ensure the normal progress of the third stage acylation reaction. The third reactor is internally provided with a stirring mechanism three for stirring. Under the action of the third motor, the stirring mechanism three rotates at high speed to stir and mix the second stage reaction product and the acylating agent participating in the acylation reaction, so that the second stage reaction product and the acylating agent participating in the acylation reaction are in close contact and uniformly mixed, thereby improving the reaction efficiency. The input end of the stirring mechanism three penetrates through the top of the third reactor and is connected with a speed reducer three, a kinetic energy processing structure. The speed reducer three uses the high-torque characteristics of the gear box to improve the output torque of the gear box by increasing the speed reduction ratio, thereby reducing the requirement for input torque and reducing the output power of the third motor to achieve the purpose of energy saving. The input end of the speed reducer three is connected with the third motor, a kinetic energy output structure, which provides kinetic energy support for the stirring operation of the stirring mechanism three. The side wall of the third reactor is wrapped with a jacket three, and the inside of the jacket three is a "snake tube" channel. Under the control of the PLC console, the refrigerant flows through the channel in the side wall of the third reactor. According to the preset temperature, the heat generated by the third stage acylation reaction is removed by using the heat exchange principle, so that the inside of the third reactor is in a low temperature state to ensure the normal and efficient progress of the third stage acylation reaction and reduce the influence of high temperature on the reaction product, thereby ensuring the quality of the reaction product. The input end of the jacket three is connected with a refrigerant inlet pipe three, and the output end of the jacket three is connected with a refrigerant outlet pipe three. The refrigerant inlet pipe three and the refrigerant outlet pipe three form a flow type pipeline to efficiently remove the heat in the third reactor by using the refrigerant, thereby providing strong support for achieving the purpose of cooling. The bottom of the third reactor is provided with a discharge pipe three, a discharge channel. After the second stage reaction product and the acylating agent react in the third reactor, the discharge pipe three is used to discharge the reaction product from the third reactor. The discharge pipe three is provided with a valve three for control. Under the control of the PLC console, the valve three controls the opening and closing of the internal channel of the discharge pipe three. During the reaction of the second stage reaction product and the acylating agent, the internal channel of the discharge pipe three is closed to prevent leakage and ensure the normal and efficient progress of the third stage acylation reaction. After the completion of the third stage acylation reaction, the internal channel of the discharge pipe three is opened to discharge the third stage reaction product from the third reactor, so that the next batch of second stage reaction product can enter the third reactor to perform the third stage acylation reaction with the acylating agent in the third reactor, and the next batch of first stage reaction product can enter the second reactor to perform the second stage acylation reaction with the acylating agent in the second reactor. The next batch of reaction raw materials and acylating agent are injected into the first reactor to achieve the purpose of continuous reaction, thereby improving the production rate.

[0016] The motor one, the heating layer, the valve one, the motor two, the valve two, the motor three and the valve three are connected with the same PLC console, which plays a control role, and the advanced PLC intelligent control system is used to control the motor one, the heating layer, the valve one, the motor two, the valve two, the motor three, the valve three, multiple temperature monitoring sensors and the refrigerant supply equipment and other mechanisms to work cooperatively, thereby providing strong support for mechanized production.

[0017] In summary, the application has the following beneficial effects:

[0018] 1. The sectional design is adopted, the traditional kettle body is set as three consecutive and independent reaction kettle bodies, under the control of the PLC console, the acylation reaction can be sequentially carried out in the first reaction, the second reaction and the third reaction according to the preset temperature of each section, the sectional control of the temperature and the sectional reaction are realized, and the reaction efficiency and the product quality are improved.

[0019] 2. The first reaction, the second reaction and the third reaction are sequentially and orderly connected, the orderly discharge of the discharge pipe one, the discharge pipe two and the discharge pipe three can be controlled by the valve one, the valve two and the valve three during the reaction process, the orderly discharge of the reaction material is realized, the continuous reaction is ensured, and the purpose of improving the reaction efficiency is achieved.

[0020] 3. The reducer is additionally installed at the motor output end, the high-torque characteristic of the gear box is used, the output torque of the gear box is improved by adopting the method of improving the reduction ratio, the requirement for the input torque is reduced, the output power of the motor is reduced, and the purpose of energy saving is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the application, the drawings required in the implementation examples will be briefly introduced below, and obviously, other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0022] Figure 1 The structural schematic diagram of the application.

[0023] Illustration:

[0024] Wherein, 1-reaction kettle one, 2-feed pipe, 3-acylating agent pipe one, 4-stirring mechanism one, 5-speed reducer one, 6-motor one, 7-jacket one, 8-refrigerant inlet pipe one, 9-refrigerant outlet pipe one, 10-heating layer, 11-discharge pipe one, 12-valve one, 13-reaction kettle two, 14-acylating agent pipe two, 15-stirring mechanism two, 16-speed reducer two, 17-motor two, 18-jacket two, 19-refrigerant inlet pipe two, 20-refrigerant outlet pipe two, 21-reaction kettle three, 22-acylating agent pipe three, 23-stirring mechanism three, 24-speed reducer three, 25-motor three, 26-jacket three, 27-refrigerant inlet pipe three, 28-refrigerant outlet pipe three, 29-discharge pipe three, 30-valve three. DETAILED DESCRIPTION

[0025] In order for those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings.

[0026] From the above technical solutions, it can be known that:

[0027] Example 1:

[0028] Reference Figure 1 .

[0029] An acylation kettle using low-temperature segmented reaction, comprising: a first reaction, a second reaction and a third reaction, the first reaction comprising a reaction kettle 1, a first-stage acylation reaction container, the top of the reaction kettle 1 is provided with a feeding pipe 2 and an acylating agent pipe 1, the feeding pipe 2 is a pipeline for injecting reaction raw materials into the reaction kettle 1, under the control of the PLC console, a predetermined amount of reaction raw materials can be injected into the reaction kettle 1 through the pipeline, the acylating agent pipe 1 is a pipeline for injecting acylating agents required for the first-stage acylation reaction into the reaction kettle 1, under the control of the PLC console, an appropriate amount of acylating agent can be injected into the reaction kettle 1 through the pipeline, the inside of the reaction kettle 1 is provided with a stirring mechanism 4 for stirring, under the action of a motor 6, the reaction raw materials and acylating agents participating in the acylation reaction are stirred and mixed at high speed to make the reaction raw materials and acylating agents participating in the acylation reaction contact closely and mix uniformly, thereby improving the reaction efficiency, the input end of the stirring mechanism 4 is connected with a speed reducer 5 through the top of the reaction kettle 1, a kinetic energy processing structure, using the high-torque characteristics of the gear box, the output torque of the gear box is improved by increasing the speed reduction ratio, the requirement for input torque is reduced, thereby reducing the output power of the motor 6 to achieve the purpose of energy saving, the input end of the speed reducer 1 is connected with the motor 6, a kinetic energy output structure, providing kinetic energy support for the stirring operation of the stirring mechanism 4, the side wall of the reaction kettle 1 is wrapped with a jacket 7, the inside of which is a "snake tube" channel, under the control of the PLC console, the coolant flows through the channel in the side wall of the reaction kettle 1, according to the preset temperature, part of the heat generated by the acylation reaction is removed by using the heat exchange principle, so that the inside of the reaction kettle 1 is in a low-temperature state, to ensure the normal and efficient performance of the acylation reaction, while reducing the influence of high temperature on the reaction product, ensuring the quality of the reaction product, the input end of the jacket 7 is connected with a coolant inlet pipe 8, a pipeline for the coolant to enter the inside of the jacket 7, the output end of the jacket 7 is connected with a coolant outlet pipe 9, a pipeline for the coolant to exit the inside of the jacket 7, forming a flow type pipeline with the coolant inlet pipe 8, to efficiently remove the heat in the inside of the reaction kettle 1 by using the coolant, thereby providing strong support for the purpose of cooling, a heating layer 10 is installed at the bottom of the reaction kettle 1, for heating, after the reaction raw materials and acylating agents are injected, the reaction kettle 1 is heated, thereby indirectly heating the reaction raw materials and acylating agent mixture, so that the temperature of the reaction raw materials and acylating agent mixture reaches the reaction temperature, to occur acylation reaction, providing strong support for the initial occurrence of the acylation reaction, a discharge pipe 11 is arranged at the bottom of the reaction kettle 1, a discharge channel, after the initial reaction of the reaction raw materials and acylating agents in the reaction kettle 1 is completed, the channel enters the inside of the second reaction, passes through the heating layer 10 and communicates with the second reaction, a valve 12 is arranged on the discharge pipe 11, for control, under the control of the PLC console, the opening and closing of the channel in the inside of the discharge pipe 11 is controlled, during the reaction of the reaction raw materials and acylating agents, the channel in the inside of the discharge pipe 11 is closed to prevent leakage, to ensure the normal and efficient performance of the first-stage acylation reaction,The internal passage of the discharge pipe 11 is opened to allow the initial reaction products to pass through the discharge pipe 11 into the reactor 13 for the second stage acylation reaction in the reactor 13. After the discharge is completed, the internal passage of the discharge pipe 11 is closed again. While the second stage acylation reaction is being carried out in the reactor 13, the second batch of reaction materials and acylating agent is injected into the reactor 1 to achieve the purpose of continuous reaction, thereby improving the production rate.

[0030] The second reaction includes a reactor two 13, a container for the second stage acylation reaction, and an acylating agent pipe two 14 is arranged on the top of the reactor two 13, the pipe is used for injecting the acylating agent required by the second stage acylation reaction into the reactor two 13, under the control of the PLC console, the pipe is used for injecting the acylating agent into the reactor two 13 in an appropriate amount, so as to ensure the normal progress of the second stage acylation reaction, a stirring mechanism two 15 is arranged in the reactor two 13, and the stirring mechanism two 15 is used for stirring, under the action of a motor two 17, the first stage reaction product and the acylating agent participating in the acylation reaction are stirred and mixed at a high speed, so that the first stage reaction product and the acylating agent participating in the acylation reaction are closely contacted and uniformly mixed, thereby improving the reaction efficiency, a speed reducer two 16 is connected to the input end of the stirring mechanism two 15 and passes through the top of the reactor two 13, the speed reducer two 16 is a kinetic energy processing structure, the speed reducer two 16 is used for improving the output torque of the gear box by improving the speed reduction ratio, reducing the requirement for the input torque, thereby reducing the output power of the motor two 17, so as to save energy, the input end of the speed reducer two 16 is connected with the motor two 17, and the motor two 17 is a kinetic energy output structure, the motor two 17 provides kinetic energy support for the stirring operation of the stirring mechanism two 15, a jacket two 18 is arranged on the side wall of the reactor two 13, and the inside of the jacket two 18 is a “snake tube” channel, under the control of the PLC console, the refrigerant flows through the channel in the side wall of the reactor two 13, and according to the preset temperature, part of the heat generated by the second stage acylation reaction is removed by using the heat exchange principle, so that the inside of the reactor two 13 is in a low-temperature state, thereby ensuring the normal and efficient progress of the second stage acylation reaction, reducing the influence of high temperature on the reaction product, ensuring the quality of the reaction product, a refrigerant inlet pipe two 19 is connected to the input end of the jacket two 18, the refrigerant inlet pipe two 19 is a pipe for the refrigerant to enter the inside of the jacket two 18, a refrigerant outlet pipe two 20 is connected to the output end of the jacket two 18, the refrigerant outlet pipe two 20 is a pipe for the refrigerant to exit the inside of the jacket two 18, and the refrigerant inlet pipe two 19 and the refrigerant outlet pipe two 20 form a flow type pipe, thereby providing strong support for removing the heat in the reactor two 13 by using the refrigerant to achieve the purpose of cooling, a discharge pipe two is arranged on the bottom of the reactor two 13, and the discharge pipe two is a discharge channel, after the first stage reaction product and the acylating agent complete the reaction in the reactor two 13, the first stage reaction product and the acylating agent enter the third reaction, and the discharge pipe two is communicated with the third reaction, a valve two is arranged on the discharge pipe two and is used for control, under the control of the PLC console, the valve two is used for controlling the opening and closing of the channel in the discharge pipe two, in the reaction process of the first stage reaction product and the acylating agent, the channel in the discharge pipe two is closed, so as to prevent leakage and ensure the normal and efficient progress of the second stage acylation reaction, after the second stage acylation reaction is completed, the channel in the discharge pipe two is opened, so that the second stage reaction product enters the reactor three 21 through the discharge pipe two, and the third stage acylation reaction is performed in the reactor three 21, after the discharge is completed, the channel in the discharge pipe two is closed again, the third stage acylation reaction is performed in the reactor three 21, and the next batch of first stage reaction product enters the reactor two 13, so that the next batch of first stage reaction product and the acylating agent perform the second stage acylation reaction in the reactor two 13, the next batch of reaction raw materials and the acylating agent are injected into the reactor one 1, and the reaction is continuously performed.to thereby increase the production rate;

[0031] The third reaction includes a reactor three 21, a container for the third acylation reaction, and an acylating agent pipe three 22 arranged at the top of the reactor three 21, through which the acylating agent required for the third acylation reaction is injected into the reactor three 21, so that the appropriate amount of acylating agent can be injected into the reactor three 21 under the control of the PLC console to ensure the normal progress of the third acylation reaction. The reactor three 21 is internally provided with a stirring mechanism three 23 for stirring, which rotates at high speed under the action of a motor three 25 to stir and mix the second reaction product and the acylating agent participating in the acylation reaction, so that the second reaction product and the acylating agent participating in the acylation reaction are in close contact and uniformly mixed, thereby improving the reaction efficiency. The input end of the stirring mechanism three 23 is connected with a speed reducer three 24 through the top of the reactor three, which is a kinetic energy processing structure. The speed reducer three 24 utilizes the high-torque characteristics of the gear box to improve the output torque of the gear box by increasing the speed reduction ratio, thereby reducing the requirement for input torque and the output power of the motor three 25, so as to achieve the purpose of energy saving. The input end of the speed reducer three 24 is connected with the motor three 25, which is a kinetic energy output structure providing kinetic energy support for the stirring operation of the stirring mechanism three 23. The reactor three 21 is wrapped with a jacket three 26, the inside of which is a "snake tube" channel. Under the control of the PLC console, the refrigerant flows through the channel in the side wall of the reactor three 21, which can utilize the heat exchange principle to remove part of the heat generated by the third acylation reaction according to the preset temperature, so that the inside of the reactor three 21 is in a low-temperature state, thereby ensuring the normal and efficient progress of the third acylation reaction, reducing the impact of high temperature on the reaction product, and ensuring the quality of the reaction product. The input end of the jacket three 26 is connected with a refrigerant inlet pipe three 27, and the output end of the jacket three 26 is connected with a refrigerant outlet pipe three 28, which form a flow-type pipeline with the refrigerant inlet pipe three 27, thereby providing strong support for removing the heat in the reactor three 21 by using the refrigerant, thereby achieving the purpose of cooling. The bottom of the reactor three 21 is provided with a discharge pipe three 29, which is a discharge channel. After the second reaction product and the acylating agent react in the reactor three 21, they are discharged through the discharge pipe three 29. The discharge pipe three 29 is provided with a valve three 30, which controls the opening and closing of the channel in the discharge pipe three 29 under the control of the PLC console. During the reaction of the second reaction product and the acylating agent, the channel in the discharge pipe three 29 is closed to prevent leakage and ensure the normal and efficient progress of the third acylation reaction. After the completion of the third acylation reaction, the channel in the discharge pipe three 29 is opened to discharge the third reaction product from the reactor three 21, so that the next batch of second reaction product can enter the reactor three 21 to react with the acylating agent in the reactor three 21, and the next batch of first reaction product can enter the reactor two 13 to react with the acylating agent in the reactor two 13, and the next batch of reaction raw materials and acylating agent can be injected into the reactor one 1.To achieve the purpose of continuous reaction, thereby improving the production rate;

[0032] The motor 6, the heating layer 10, the valve 12, the motor 17, the valve 2, the motor 25 and the valve 3 are connected with the same PLC console, which plays a control role, and the advanced PLC intelligent control system is used to control the motor 6, the heating layer 10, the valve 12, the motor 17, the valve 2, the motor 25, the valve 3, multiple temperature monitoring sensors and refrigerant supply equipment and other mechanisms to work together, thereby providing strong support for mechanized production.

[0033] As a preferred embodiment, the inner walls of the reactor 1, the reactor 13 and the reactor 21 are each provided with a temperature monitoring sensor, which is connected with the PLC console in line and transmits the reaction temperature in the reactor 1, the reactor 13 and the reactor 21 to the PLC console in real time, so that the PLC console can control the speed of the refrigerant supply equipment to provide refrigerant for the first reaction, the second reaction and the third reaction, thereby achieving the purpose of precise temperature control.

[0034] As a preferred embodiment, the bottom of the reactor 1, the reactor 13 and the reactor 21 is "conical", which is beneficial to reduce the residue rate of the material in the reactor 1, the reactor 13 and the reactor 21 during the discharging process.

[0035] As a preferred embodiment, the inner part of the jacket 7, the jacket 18 and the jacket 26 is a "serpentine" channel, which is beneficial to the orderly and comprehensive flow of the refrigerant in the jacket 7, the jacket 18 and the jacket 26, and has high cooling efficiency and better cooling effect.

[0036] As a preferred embodiment, the motor 6, the motor 17 and the motor 25 are servo motors, which realize closed-loop control of speed and torque, overcome the problem of step motor out of step, have strong overload capacity and can bear three times the rated torque, meet the requirements of uniform stirring and rapid starting of the stirring mechanism 4, the stirring mechanism 15 and the stirring mechanism 23, and ensure the orderly progress of the reaction.

[0037] As a preferred embodiment, the speed reducer 5, the speed reducer 16 and the speed reducer 24 are D-type gearboxes, which utilize the high-torque characteristics of the gearbox, adopt a way to improve the reduction ratio to improve the output torque of the gearbox, reduce the requirement for input torque, and reduce the output power of the motor 6, the motor 17 and the motor 25, thereby achieving the purpose of energy saving.

[0038] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope of the application being indicated by the following claims.

[0039] It should be understood that the application is not limited to the precise construction hereinafter described and as shown in the attached drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The embodiments described above are meant to be exemplary only, with the true scope of the application being indicated by the following claims.

Claims

1. An acylation kettle employing low temperature staged reactions, comprising: The first reaction, the second reaction and the third reaction are characterized in that the first reaction comprises a reaction kettle one (1), the top of the reaction kettle one (1) is provided with a feeding pipe (2) and an acylating agent pipe one (3), the inside of the reaction kettle one (1) is provided with a stirring mechanism one (4), the input end of the stirring mechanism one (4) is connected with a speed reducer one (5) penetrating through the top of the reaction kettle one (1), the input end of the speed reducer one (5) is connected with a motor one (6), the side wall of the reaction kettle one (1) is wrapped with a jacket one (7), the input end of the jacket one (7) is connected with a refrigerant inlet pipe one (8), the output end of the jacket one (7) is connected with a refrigerant outlet pipe one (9), the bottom of the reaction kettle one (1) is provided with a heating layer (10), the bottom of the reaction kettle one (1) is provided with a discharge pipe one (11) penetrating through the heating layer (10) and communicating with the second reaction, the discharge pipe one (11) is provided with a valve one (12); The second reaction comprises a reaction kettle two (13), the top of the reaction kettle two (13) is provided with an acylating agent pipe two (14), the inside of the reaction kettle two (13) is provided with a stirring mechanism two (15), the input end of the stirring mechanism two (15) is connected with a speed reducer two (16) penetrating through the top of the reaction kettle two (13), the input end of the speed reducer two (16) is connected with a motor two (17), the side wall of the reaction kettle two (13) is wrapped with a jacket two (18), the input end of the jacket two (18) is connected with a refrigerant inlet pipe two (19), the output end of the jacket two (18) is connected with a refrigerant outlet pipe two (20), the bottom of the reaction kettle two (13) is provided with a discharge pipe two communicating with the third reaction, the discharge pipe two is provided with a valve two; The third reaction comprises a reaction kettle three (21), the top of the reaction kettle three (21) is provided with an acylating agent pipe three (22), the inside of the reaction kettle three (21) is provided with a stirring mechanism three (23), the input end of the stirring mechanism three (23) is connected with a speed reducer three (24) penetrating through the top of the reaction kettle three (21), the input end of the speed reducer three (24) is connected with a motor three (25), the side wall of the reaction kettle three (21) is wrapped with a jacket three (26), the input end of the jacket three (26) is connected with a refrigerant inlet pipe three (27), the output end of the jacket three (26) is connected with a refrigerant outlet pipe three (28), the bottom of the reaction kettle three (21) is provided with a discharge pipe three (29), the discharge pipe three (29) is provided with a valve three (30); The motor one (6), the heating layer (10), the valve one (12), the motor two (17), the valve two, the motor three (25) and the valve three (30) are connected with the same PLC control console.

2. An acylation kettle employing low temperature staged reaction according to claim 1, wherein, The inside walls of the reaction kettle one (1), the reaction kettle two (13) and the reaction kettle three (21) are each provided with a temperature monitoring sensor, which are connected with the PLC control console.

3. An acylation kettle employing low temperature staged reaction according to claim 1, wherein, The bottoms of the reaction kettle one (1), the reaction kettle two (13) and the reaction kettle three (21) are all "conical".

4. The acylation kettle employing low temperature staged reaction of claim 1, wherein, The jacket one (7), the jacket two (18), and the jacket three (26) are all "serpent" channels inside.

5. The acylation kettle employing low temperature staged reaction of claim 1, wherein, The motor one (6), the motor two (17), and the motor three (25) are all servo motors.

6. An acylation kettle employing low temperature staged reaction according to claim 1, wherein, The speed reducer one (5), the speed reducer two (16), and the speed reducer three (24) are all D-shaped gear boxes.

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