Kettle reactor and control method

Abstract

The invention discloses a tank reactor and a control method, and belongs to the technical field of reactors. The tank reactor comprises a reactor body, a cooling coil, a heating jacket, a first electric control valve, a second electric control valve, a control module and a plurality of thermocouple thermometers. And the first electric control valve, the second electric control valve and the plurality of thermocouple thermometers are electrically connected with the control module. The design of a plurality of thermocouple thermometers is beneficial for improving the accuracy of temperature detection. After the kettle type reactor is designed, the control module automatically adjusts the opening degree of the first electric control valve and the opening degree of the second electric control valve according to temperature values collected by the thermometers, and the temperature in the reaction cavity is regulated and controlled, so that the temperature meets the reaction requirement. The kettle type reactor is high in adjusting precision and adjusting speed, manpower is saved, the production efficiency of polyacrylamide is improved, and the automation degree of producing polyacrylamide through an inverse emulsion method is improved.

Description

Technical Field

[0001] This application belongs to the technical field of reactors, and particularly relates to a kettle reactor and a control method thereof. Background Art

[0002] Polyacrylamide polymers have properties such as thickening, drag reduction, and adhesiveness, and are extremely widely used in industries such as oil production, chemical engineering, environmental protection, and medicine.

[0003] Polyacrylamide polymers are mostly produced by inverse emulsion polymerization of acrylamide. During the copolymerization reaction process of acrylamide and 2-acrylamido-2-methylpropanesulfonic acid (AMPS) in an oil-water mixed emulsion, the reaction product is converted from "oil-in-water" to "water-in-oil" by a phase transfer agent, forming a block polymer of acrylamide and 2-acrylamido-2-methylpropanesulfonic acid (AMPS). The main factors affecting the reaction effect are the emulsification and mixing effects of the water phase and the oil phase, temperature control, and the molecular weight control of the reaction product.

[0004] Enterprises producing polyacrylamide by the inverse emulsion method are mostly small private enterprises. When producing, a kettle reactor is required. Using the kettle reactor in the related technology, the production efficiency of polyacrylamide is low. Summary of the Invention

[0005] This application aims to at least solve to some extent the technical problem of low production efficiency in the related technology of producing polyacrylamide by a kettle reactor. For this purpose, this application provides a kettle reactor and a control method thereof.

[0006] In a first aspect, a kettle reactor provided by an embodiment of this application includes: a reactor body having a reaction chamber; a cooling coil located in the reaction chamber, with a first water inlet provided at one end and a first water outlet provided at the other end; a heating jacket sleeved outside the reactor body, with a second water inlet provided on one side and a second water outlet provided on the other side; a first electric control valve provided on the side of the first water inlet or the first water outlet; a second electric control valve provided on the side of the second water inlet or the second water outlet; a plurality of thermocouple thermometers spaced apart in the reaction chamber; and a control module electrically connected to the first electric control valve, the second electric control valve, and the plurality of thermocouple thermometers to adjust the opening degrees of the first electric control valve and the second electric control valve according to the average value of the temperature values collected by the plurality of thermocouple thermometers.

[0007] In some embodiments, an inhibitor feed port communicating with the reaction chamber is further provided on the reactor body, and the inhibitor feed port is used to communicate with an inhibitor; the autoclave reactor further includes a third electric control valve, and the third electric control valve is arranged on the side of the inhibitor feed port; the control module is electrically connected to the third electric control valve to control the opening and closing of the third electric control valve according to the highest value of the temperature values collected by the plurality of thermocouple thermometers.

[0008] In some embodiments, the autoclave reactor further includes a first water inlet pipe, a first water outlet pipe, a second water inlet pipe, a second water outlet pipe and an inhibitor feed pipe; one end of the first water inlet pipe communicates with the first water inlet, and one end of the first water outlet pipe communicates with the first water outlet; one end of the second water inlet pipe communicates with the second water inlet, and one end of the second water outlet pipe communicates with the second water outlet; one end of the inhibitor feed pipe communicates with the inhibitor feed port; the first electric control valve is arranged on the first water outlet pipe, the second electric control valve is arranged on the second water outlet pipe, and the third electric control valve is arranged on the inhibitor feed pipe.

[0009] In some embodiments, the reactor body includes: a kettle body and a kettle cover, the kettle cover is detachably connected to the kettle body, and together with the kettle body encloses the reaction chamber; a stirrer, including a rotating rod, a turbine paddle and a plurality of inclined paddles, one side of the rotating rod is rotatably connected to the kettle cover, the inclined paddles and the turbine paddle are fixedly connected to the rotating rod, and the turbine paddle is located between the plurality of inclined paddles.

[0010] In some embodiments, the reactor body further includes a baffle plate, the baffle plate is fixedly arranged on the inner side wall of the kettle body, and the length direction of the baffle plate is arranged parallel to or at an angle to the axis of the rotating rod.

[0011] In some embodiments, the stirrer is provided with two inclined paddles and one turbine paddle, the turbine paddle is located between the two inclined paddles, the turbine paddle is located in the middle of the reaction chamber, and the two inclined paddles are respectively located in the upper and lower parts of the reaction chamber.

[0012] In some embodiments, the inclined paddle is provided with 4 blades, and the deflection angle of the blade is 45°.

[0013] In a second aspect, an embodiment of the present application further provides a control method for an autoclave reactor, which is implemented based on the autoclave reactor provided in the first aspect above, and the method includes the following steps:

[0014] S100, set the lowest temperature value A, the highest temperature value B and the runaway temperature value C in the reaction chamber;

[0015] S200. The control module obtains the temperature values at various locations in the reaction chamber through multiple thermocouple thermometers;

[0016] S300. The control module obtains an average value D and a maximum value E based on the multiple temperature values obtained in step S200;

[0017] S400. The control module controls the first electric control valve, the second electric control valve, and the third electric control valve based on the average value D and the maximum value E. If A ≤ D ≤ B, then the first electric control valve, the second electric control valve, and the third electric control valve do not act; if D ≤ A, then the control module increases the opening degree of the second electric control valve so that A ≤ D ≤ B; if D ≥ B, then the control module increases the opening degree of the first electric control valve so that A ≤ D ≤ B; if E ≥ C, then the control module opens the third electric control valve; if E ≤ C, the third electric control valve does not act and continues to be closed.

[0018] In some embodiments, if D ≤ A, the control module simultaneously reduces the opening degree of the first electric control valve or closes the first electric control valve so that A ≤ D ≤ B; if D ≥ B, the control module simultaneously reduces the opening degree of the second electric control valve or closes the second electric control valve so that A ≤ D ≤ B;

[0019] In some embodiments, if E ≥ C, the control module simultaneously reduces the opening degree of the second electric control valve or closes the second electric control valve and increases the opening degree of the first electric control valve.

[0020] The present invention has at least the following beneficial effects:

[0021] The autoclave reactor of the present application includes a reactor body, a cooling coil, a heating jacket, a first electric control valve, a second electric control valve, a control module, and multiple thermocouple thermometers. The first electric control valve, the second electric control valve, and the multiple thermocouple thermometers are all electrically connected to the control module. The design of the multiple thermocouple thermometers is beneficial to improving the accuracy of temperature detection. After the autoclave reactor of the present application is designed in this way, the control module automatically adjusts the opening degrees of the first electric control valve and the second electric control valve according to the temperature values collected by the multiple thermometers, and controls the temperature in the reaction chamber so that the temperature meets the reaction requirements. The autoclave reactor of the present application has high adjustment accuracy and fast adjustment speed, which helps to save manpower, improve the production efficiency of polyacrylamide, and improve the automation degree of producing polyacrylamide by the inverse emulsion method. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 The structural schematic diagram of the autoclave reactor in one or more embodiments of the present invention is shown.

[0024] Figure 2 Shown is Figure 1 The structural schematic diagram after hiding the control module, the first electric control valve, the second electric control valve, the third electric control valve, the first water inlet pipe, the first water outlet pipe, the second water inlet pipe, the second water outlet pipe, and the inhibitor feed pipe.

[0025] Figure 3 The structural schematic diagram of the stirrer of the autoclave reactor in one or more embodiments of the present invention is shown.

[0026] Reference numerals: 10 - reactor body, 10a - reaction chamber, 10b - inhibitor feed port, 11 - kettle body, 12 - kettle cover, 13 - stirrer, 131 - rotating rod, 132 - turbine impeller, 133 - pitched blade, 14 - baffle, 20 - cooling coil, 20a - first water inlet, 20b - first water outlet, 30 - heating jacket, 30a - second water inlet, 30b - second water outlet, 40 - first electric control valve, 50 - second electric control valve, 60 - third electric control valve, 70 - control module, 80 - first water inlet pipe, 90 - first water outlet pipe, 100 - second water inlet pipe, 110 - second water outlet pipe, 120 - inhibitor feed pipe, 130 - thermocouple thermometer. Detailed embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0028] It should be noted that all the directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If this specific posture changes, the directional indication will also change accordingly.

[0029] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] Polyacrylamide polymers have properties such as thickening, drag reduction, and adhesiveness, and are extremely widely used in industries such as oil production, chemical engineering, environmental protection, and medicine.

[0032] Polyacrylamide polymers are mostly produced by the method of inverse emulsion polymerization of acrylamide. In the process of copolymerization of acrylamide and 2-acrylamido-2-methylpropanesulfonic acid (AMPS) in an oil-water mixed emulsion, the reaction product is converted from "oil-in-water" to "water-in-oil" by a phase transfer agent to form a block polymer of acrylamide and 2-acrylamido-2-methylpropanesulfonic acid (AMPS). The main factors affecting the reaction effect are the emulsification and mixing effects of the water phase and the oil phase, temperature control, and molecular weight control of the reaction product.

[0033] Enterprises producing polyacrylamide by the inverse emulsion method are mostly small private enterprises. When producing, a kettle reactor is required. Using the kettle reactor in the related technology, the production efficiency of polyacrylamide is low. In the related technology, the structure of the kettle reactor is simple. Usually, a centralized or local thermometer is set on the kettle reactor to detect the temperature of the reaction chamber. The temperature is read manually, and the opening degree of the valve is adjusted manually according to the temperature value. Such an adjustment method not only has low adjustment efficiency and poor adjustment accuracy, but also often makes temperature control difficult due to untimely manual operation.

[0034] Therefore, in the related technology, there is a technical problem of low production efficiency of polyacrylamide produced by a kettle reactor. The embodiments of the present application provide a kettle reactor and a control method.

[0035] The present application will be described below with reference to the accompanying drawings and specific embodiments:

[0036] As Figure 1As shown in the figure, the autoclave reactor of the present application includes: a reactor body 10, a cooling coil 20, a heating jacket 30, a first electric control valve 40, a second electric control valve 50, and a plurality of thermocouple thermometers 130. The reactor body 10 is provided with a reaction chamber 10a, the cooling coil 20 is located in the reaction chamber 10a, one end of the cooling coil 20 is provided with a first water inlet 20a, and the other end is provided with a first water outlet 20b. The heating jacket 30 is sleeved outside the reactor body 10, one side of the heating jacket 30 is provided with a second water inlet 30a, and the other side is provided with a second water outlet 30b. The first electric control valve 40 is arranged on the side of the first water inlet 20a or the first water outlet 20b. The second electric control valve 50 is arranged on the side of the second water inlet 30a or the second water outlet 30b. A plurality of thermocouple thermometers 130 are arranged at intervals in the reaction chamber 10a. The control module 70 is electrically connected to the first electric control valve 40, the second electric control valve 50, and the plurality of thermocouple thermometers 130, so as to adjust the opening degrees of the first electric control valve 40 and the second electric control valve 50 according to the average value of the temperature values collected by the plurality of thermocouple thermometers 130.

[0037] It is easy to understand that a material inlet and a material outlet for communicating with the reaction chamber 10a are also provided on the reactor body 10. Before the reaction, the material enters the reaction chamber 10a from the material inlet, and after the reaction is completed, it is discharged from the material outlet.

[0038] During use, the first water inlet 20a of the cooling coil 20 is used to communicate with the refrigerant, and the first water outlet 20b of the cooling coil 20 is used to communicate with a container for collecting the refrigerant or a cooler for cooling the refrigerant, etc. The refrigerant enters the cooling coil 20 from the first water inlet 20a, exchanges heat with the reactants in the reaction chamber 10a, absorbs the reaction heat generated by the reactants, and takes out the heat to cool the reactants.

[0039] During use, the second water inlet 30a of the heating jacket 30 is used to communicate with the heat medium, and the second water outlet 30b of the heating jacket 30 is used to communicate with a container for collecting the heat medium or a heater for heating the heat medium. The heat medium enters the heating jacket 30 from the second water inlet 30a, transfers the heat to the reactor body 10, and then conducts the heat to the reactants located in the reactor body 10, exchanges heat with the reactants, so as to heat the reactants and raise the temperature of the reactants to an appropriate temperature to initiate the reaction.

[0040] The first electric control valve 40 controls the flow rate of the refrigerant in the cooling coil 20, and thus controls the cooling rate of the reactants in the reaction chamber 10a. The first electric control valve 40 is arranged on the cooling coil 20, and it can control the flow rate of the refrigerant in the cooling coil 20 whether it is located on the side of the first water inlet 20a or the first water outlet 20b.

[0041] The second electric control valve 50 controls the flow rate of the heat medium in the heating jacket 30, thereby controlling the heating rate of the reactants in the reaction chamber 10a. The first electric control valve 40 is arranged on the heating jacket 30, and it can control the flow rate of the heat medium in the heating jacket 30 whether it is located on the side of the second water inlet 30a or the side of the second water outlet 30b.

[0042] The refrigerant can be chilled water, and the heat medium can be hot water, which is not limited in this application. The structures of the heating jacket 30 and the cooling coil 20 are diverse and are well-known to those skilled in the art, and are not limited in this application.

[0043] This application's autoclave reactor is provided with multiple thermocouple thermometers 130, and the thermocouple thermometers 130 are arranged at intervals in the reaction chamber 10a to detect the temperatures in different places in the reaction chamber 10a and accurately reflect the temperature conditions of the temperature field in the reaction chamber 10a. The setting of multiple thermocouple thermometers 130, compared with the setting of a single thermometer, helps to improve the accuracy of temperature detection and reduce the error of temperature measurement.

[0044] In some embodiments, as Figure 1 shown, this application's autoclave reactor is provided with two groups of thermocouple thermometers 130, a total of 6. The thermocouple thermometers 130 are inserted from above the reactor body 10 and extend to a position 200 mm from the bottom of the kettle. Each group of thermocouple thermometers 130 takes 1 temperature measurement point at the upper, middle, and lower positions of the autoclave reactor, and a total of 6 temperature measurement values are obtained. The control module 70 automatically adjusts the opening degrees of the first electric control valve 40 and the second electric control valve 50 according to the average value of the multiple temperature values obtained by these 6 thermocouple thermometers 130, so that the temperature of the reaction chamber 10a is maintained within the temperature range for the reaction to proceed.

[0045] In summary, this application's autoclave reactor includes a reactor body 10, a cooling coil 20, a heating jacket 30, a first electric control valve 40, a second electric control valve 50, multiple thermocouple thermometers 130, and a control module 70. The first electric control valve 40, the second electric control valve 50, and the multiple thermocouple thermometers 130 are all electrically connected to the control module 70. The design of the multiple thermocouple thermometers 130 is beneficial to improving the accuracy of temperature detection. After this application's autoclave reactor is designed in this way, the control module 70 automatically adjusts the opening degrees of the first electric control valve 40 and the second electric control valve 50 according to the temperature values collected by the multiple thermocouple thermometers 130 to control the temperature in the reaction chamber 10a so that the temperature meets the reaction requirements. This application's autoclave reactor has high adjustment accuracy and fast adjustment speed, which helps to save manpower, improve the production efficiency of polyacrylamide, and improve the automation degree of the process of producing polyacrylamide by the inverse emulsion method.

[0046] In some embodiments, the autoclave reactor of the present application is further provided with a polymerization inhibitor inlet 10b communicating with the reaction chamber 10a, and the polymerization inhibitor inlet 10b is used to communicate with a polymerization inhibitor. The autoclave reactor further includes a third electric control valve 60, and the third electric control valve 60 is arranged on the side of the polymerization inhibitor inlet 10b. The control module 70 is electrically connected to the third electric control valve 60 to adjust the opening and closing of the third electric control valve 60 according to the highest value of the temperature values collected by a plurality of thermocouple thermometers 130. After such a design, the polymerization inhibitor inlet 10b communicates with the polymerization inhibitor, the third electric control valve 60 controls the opening and closing of the polymerization inhibitor inlet 10b, and the control module 70 can adjust the opening and closing of the third electric control valve 60 in a timely manner according to the temperature value. When a reaction runaway or reaction temperature runaway occurs, the third electric control valve 60 is opened, so that the polymerization inhibitor is quickly added into the reaction chamber 10a, the reaction is quickly blocked from continuing, the polymer explosion polymerization is prevented from occurring, and the reaction is ensured to proceed safely. After the reaction is blocked, the control module 70 controls the third electric control valve 60 to close to avoid continuous addition of the polymerization inhibitor. In some embodiments, the polymerization inhibitor used is compressed air, and the polymerization inhibitor inlet 10b communicates with a compressed air source.

[0047] In some embodiments, as Figure 1 shown, the autoclave reactor of the present application is provided with two groups of thermocouple thermometers 130, a total of six. The thermocouple thermometers 130 are inserted from above the reactor body 10 and extend to a position 200 mm from the bottom of the kettle. Each group of thermocouple thermometers 130 takes a temperature measurement point at the upper, middle, and lower positions of the autoclave reactor, and a total of six temperature measurement values are obtained. The control module 70 adjusts the opening and closing of the third electric control valve 60 according to the highest temperature value in each group of thermocouple thermometers 130, that is: when the highest value in any one of the two groups of thermocouple thermometers 130 reaches the runaway temperature value, the control module 70 will send a signal to interlock and open the third electric control valve 60.

[0048] In some embodiments, the autoclave reactor further includes a first water inlet pipe 80, a first water outlet pipe 90, a second water inlet pipe 100, a second water outlet pipe 110, and an inhibitor feed pipe 120. One end of the first water inlet pipe 80 communicates with the first water inlet 20a, one end of the first water outlet pipe 90 communicates with the first water outlet 20b, one end of the second water inlet pipe 100 communicates with the second water inlet 30a, one end of the second water outlet pipe 110 communicates with the second water outlet 30b, and one end of the inhibitor feed pipe 120 communicates with the inhibitor feed port 10b. A first electric control valve 40 is provided on the first outlet pipe, a second electric control valve 50 is provided on the second water outlet pipe 110, and a third electric control valve 60 is provided on the inhibitor feed pipe 120. After such a design, the other end of the first water inlet pipe 80 communicates with the refrigerant, the refrigerant enters the cooling coil 20 from the first water inlet pipe 80, and then is discharged from the first water outlet pipe 90. The other end of the first drain pipe 90 can communicate with a cooler, a refrigerant storage container, etc.; the other end of the second water inlet pipe 100 communicates with the heat medium, the heat medium enters the heating jacket 30 from the second water inlet pipe 100, and then is discharged from the second water outlet pipe 110. The other end of the second water outlet pipe 110 can communicate with a heater, a heat medium storage container, etc.; the other end of the inhibitor feed pipe 120 communicates with the inhibitor, and the inhibitor enters the reaction chamber 10a through the inhibitor feed pipe 120; the first electric control valve 40 controls the opening and closing of the first water outlet pipe 90, the second electric control valve 50 controls the opening and closing of the second water outlet pipe 110, and the third electric control valve 60 controls the opening and closing of the inhibitor feed pipe 120.

[0049] In some embodiments, as Figure 1 shown, a manual control valve is further provided on both the upstream and downstream sides of the first electric control valve 40. A bypass pipe is also connected in parallel on the first water outlet pipe 90, and a manual control valve is provided on the bypass pipe. The two ends of the bypass pipe communicate with the upstream and downstream of the first electric control valve 40 respectively. When the first electric control valve 40 or the control module 70 is damaged and needs to be replaced or repaired, the manual control valves on both the upstream and downstream sides of the first electric control valve 40 can be closed, and then the manual control valve on the bypass pipe can be opened to realize the outflow of the refrigerant through the bypass pipe, which facilitates the use of the autoclave reactor of the present application.

[0050] In some embodiments, as Figure 1 shown, a manual control valve is further provided on both the upstream and downstream sides of the first electric control valve 40. A bypass pipe is also connected in parallel on the second water outlet pipe 110, and a manual control valve is provided on the bypass pipe. The two ends of the bypass pipe communicate with the upstream and downstream of the second electric control valve 50 respectively. When the second electric control valve 50 or the control module 70 is damaged and needs to be replaced or repaired, the manual control valves on both the upstream and downstream sides of the first electric control valve 40 can be closed, and then the manual control valve on the bypass pipe can be opened to realize the outflow of the heat medium through the bypass pipe, which facilitates the use of the autoclave reactor of the present application.

[0051] In some embodiments, as Figure 2As shown, the reactor body 10 includes a kettle body 11, a kettle cover 12 and a stirrer 13. The kettle cover 12 is detachably connected to the kettle body 11 and encloses a reaction chamber 10a with the kettle body 11. As Figure 3 shown, the stirrer 13 includes a rotating rod 131, a turbine blade 132 and a plurality of inclined blades 133. One side of the rotating rod 131 is rotatably connected to the kettle cover 12. The inclined blades 133 and the turbine blade 132 are fixedly connected to the rotating rod 131, and the turbine blade 132 is located between the plurality of inclined blades 133. The blades of the inclined blades 133 are flat, and the blades of the turbine blade 132 are arc-shaped, as Figure 3 shown. After such a design, the stirrer 13 rotates in the reaction chamber 10a under the action of a driving device such as a motor, so that the materials in the reaction chamber 10a are evenly mixed, and the reaction rate is accelerated. Through the arrangement of the inclined blades 133 and the turbine blade 132, the flow of the materials can be strengthened, the mixing performance can be enhanced, the fluid shear efficiency can be improved, and the fluid dead zone in the local area can be effectively avoided, the occurrence of polymer deposition can be reduced, the cleaning cycle of the operator can be shortened, and the homogeneous state of the emulsion can be better maintained. The turbine blade 132 can generate a large centrifugal force, and the fluid is thrown to the inner wall of the reactor body 10 by stirring, forming a fluid circulation, which can significantly increase the fluid velocity in the area of the cooling coil 20.

[0052] In some embodiments, as Figure 2 shown, the reactor body 10 further includes a baffle 14. The baffle 14 is fixedly arranged on the inner side wall of the kettle body 11, and the length direction of the baffle 14 is parallel to or at an angle to the axis of the rotating rod 131. The angular arrangement can be an acute angle arrangement or an obtuse angle arrangement. Through the action of the baffle 14, the formation of eddy currents inside the reaction chamber 10a can be avoided, the vertical axial movement of the materials can be enhanced, and the complete realization of the flow pattern can be promoted. In some embodiments, as Figure 2 shown, the baffle 14 is vertically arranged, and the length direction of the baffle 14 is parallel to the axis of the rotating rod 131.

[0053] The number of blades on each of the turbine blade 132 and the inclined blades 133 is not limited in this application. The number of the turbine blade 132 and the inclined blades 133 is also not limited in this application. In some embodiments, the stirrer 13 includes two inclined blades 133 and one turbine blade 132. The turbine blade 132 is located between the two inclined blades 133. The turbine blade 132 is located in the middle of the reaction chamber 10a, and the two inclined blades 133 are respectively located in the upper and lower parts of the reaction chamber 10a. After such a design, the two inclined blades 133 respectively stir the upper and lower parts of the reaction chamber 10a, and the turbine blade 132 stirs the middle part of the reaction chamber 10a, simultaneously stirring the upper, middle and lower parts of the reactor, ensuring the mixing performance of the kettle-type reactor of this application, and at the same time streamlining the structure of the stirrer 13, which is convenient for the processing of the stirrer 13.

[0054] In some embodiments, there are 4 blades provided on the inclined impeller 133, and the deflection angle of the blades is 45°, which facilitates the machining and manufacturing of the agitator 13. In some embodiments, there are 6 blades provided on the turbine impeller 132, which further simplifies the structure of the agitator 13.

[0055] In some embodiments, the reverse emulsion polymerization reaction of the present application's autoclave reactor is used to produce ultra-high molecular weight polyacrylamide. The nominal volume of the autoclave reactor is 10 m 3 , the height-diameter ratio of the autoclave reactor is 2:1, the diameter is 1750 mm, the height of the autoclave is 3500 mm, the upper and lower heads are elliptical heads, and the material of the autoclave reactor is 316L. There are two inclined impellers 133 and one turbine impeller 132 provided on the agitator 13. The turbine impeller 132 is located between the two inclined impellers 133. The inclined impeller 133 is an upward-turning four-blade inclined impeller 133 with a deflection angle of 45°. The turbine impeller 132 is a six-blade turbine impeller 132 with an arc-shaped surface. The diameter of the upper-layer inclined impeller 133 is 850 mm, the diameter of the lower-layer inclined impeller 133 is 600 mm, and the diameter of the middle turbine impeller 132 is 910 mm. There are baffles 14 provided in the reactor. There are 4 baffles 14, and the size of the baffles 14 is 140 mm × 2750 mm. The four baffles 14 are arranged at equal intervals on the inner wall of the reaction chamber 10a. The agitator 13 rotates counterclockwise at a speed of 100 rpm. After such design, the vertical axial movement of the material is significantly enhanced, avoiding bad flow states such as the material swirling. The middle turbine impeller of the combined impeller generates a large centrifugal force, and the fluid is thrown to the inner wall of the reactor body 10 by stirring, forming a fluid circulation, and the fluid velocity near the cooling coil 20 increases significantly. In addition, after using the combined impeller formed by the inclined impeller 133 and the turbine impeller 132, the shearing effect of the fluid is significantly enhanced, the turbulence at the gap between the cooling coil 20 and the inner wall of the reactor body 10 is enhanced, and the mixing time is significantly reduced, which is beneficial to maintaining the homogeneity of the emulsion. At the same time, after such design, the flow dead zone at the bottom of the reaction chamber 10a is eliminated, the situation of material deposition in the gap of the cooling coil 20 is improved, and the cleaning cycle of the operator is increased from 7 days to 15 days, improving the production efficiency. After detection, the colloid content in the product drops from 0.4% - 1% to 0.2% - 0.3%, and the product quality is improved.

[0056] In summary, the autoclave reactor of the present application includes a reactor body 10, a cooling coil 20, a heating jacket 30, a first electric control valve 40, a second electric control valve 50, a plurality of thermocouple thermometers 130, and a control module 70. The first electric control valve 40, the second electric control valve 50, and the plurality of thermocouple thermometers 130 are all electrically connected to the control module 70. The design of the plurality of thermocouple thermometers 130 is beneficial to improving the accuracy of temperature detection. After the autoclave reactor of the present application is designed in this way, the control module 70 automatically adjusts the opening degrees of the first electric control valve 40 and the second electric control valve 50 according to the temperature values collected by the plurality of thermocouple thermometers 130, and controls the temperature in the reaction chamber 10a to make the temperature meet the reaction requirements. The autoclave reactor of the present application has high adjustment accuracy and fast adjustment speed, which helps to save manpower, improve the production efficiency of polyacrylamide, and improve the automation degree of the process of producing polyacrylamide by the inverse emulsion method. Through the design of the third electric control valve 60 and the inhibitor feed port 10b, the autoclave reactor of the present application can automatically add inhibitors, quickly block the continuation of the reaction, prevent polymer explosion polymerization from occurring, ensure the safe progress of the reaction, and improve the automation degree of the autoclave reactor of the present application. Through the arrangement of the inclined paddle 133 and the turbine paddle 132, the flow of the material can be strengthened, the mixing performance can be enhanced, the fluid shear efficiency can be improved, and the fluid dead zone in the local area can be effectively avoided, the occurrence of polymer deposition can be reduced, the cleaning cycle of the operator can be shortened, and the homogeneous state of the emulsion can be better maintained. The turbine paddle 132 can generate a large centrifugal force, and the fluid is thrown to the inner wall of the reactor body 10 by stirring to form a fluid circulation, which can significantly increase the fluid velocity in the area of the cooling coil 20.

[0057] Based on the same inventive concept, the embodiment of the present application also provides a control method, which is implemented based on the autoclave reactor provided above in the present application. The method includes the following steps:

[0058] First, S100, set the lowest temperature value A, the highest temperature value B, and the runaway temperature value C that can ensure the stable progress of the reaction for the reaction chamber 10a;

[0059] Next, S200, the control module 70 obtains the temperature values at various places in the reaction chamber 10a through the plurality of thermocouple thermometers 130;

[0060] Then, S300, the control module 70 obtains the average value D of the plurality of temperature values and the highest value E among the plurality of temperature values based on the obtained plurality of temperature values;

[0061] Finally, in S400, the control module 70 controls the first electric control valve 40, the second electric control valve 50, and the third electric control valve 60 based on the average value D and the highest value E. Specifically, if A ≤ D ≤ B, it indicates that the temperature in the reaction chamber 10a is normal and can meet the requirements for stable reaction, then the first electric control valve 40, the second electric control valve 50, and the third electric control valve 60 do not act; if D ≤ A, it indicates that the temperature in the reaction chamber 10a is relatively low, then the opening of the second electric control valve 50 is increased, so that the flow rate of the heat medium in the heating jacket 30 increases, heating and raising the temperature of the reaction chamber 10a to make A ≤ D ≤ B; if D ≥ B, it indicates that the temperature in the reaction chamber 10a is relatively high, then the opening of the first electric control valve 40 is increased, so that the flow rate of the refrigerant in the cooling coil 20 increases, cooling the reaction chamber 10a to make A ≤ D ≤ B; if E ≥ C, it indicates that the reaction in the reaction chamber 10a has got out of control and runaway temperature has occurred, then the third electric control valve 60 is opened to inject polymerization inhibitor into the reaction chamber 10a, quickly terminating the reaction to avoid explosive polymerization; if E ≤ C, the third electric control valve 60 does not act and remains closed.

[0062] In some embodiments, when D ≤ A, the opening of the first electric control valve 40 is simultaneously reduced or the first electric control valve 40 is closed, so that the temperature in the reaction chamber 10a rises rapidly to make A ≤ D ≤ B. When D ≥ B, the opening of the second electric control valve 50 is simultaneously reduced or the second electric control valve 50 is closed, so that the temperature in the reaction chamber 10a drops rapidly to make A ≤ D ≤ B.

[0063] In some embodiments, when E ≥ C, the opening of the second electric control valve 50 is simultaneously reduced or the second electric control valve 50 is closed, and the opening of the first electric control valve 40 is increased to prevent the heat exchange jacket from continuing to heat the reaction chamber 10a.

[0064] In some embodiments, the lowest temperature value A is 40 °C, the highest temperature value B is 45 °C, and the runaway temperature value is 65 °C.

[0065] Those skilled in the art can design and manufacture the control module 70 in the autoclave reactor of the present application according to the above description of the present application and the common general knowledge in the art. In some embodiments of the present application, as Figure 1 shown, the control module 70 includes a temperature transmitter TT, a temperature display interlock alarm TISA, a temperature average value calculator TY, and a temperature command controller TICA that are electrically connected in sequence. The thermocouple thermometer 130 is electrically connected to the temperature average value calculator TY, the first electric control valve 40, the second electric control valve 50 are electrically connected to the temperature command controller TICA, and the third electric control valve 60 is electrically connected to the temperature display interlock alarm TISA.

[0066] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0067] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0068] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A batch reactor, characterized in that, it includes: A reactor body (10) provided with a reaction chamber (10a); A cooling coil (20) located within the reaction chamber (10a), one end of the cooling coil (20) being provided with a first water inlet (20a) and the other end being provided with a first water outlet (20b); A heating jacket (30) sleeved outside the reactor body (10), one side of the heating jacket (30) being provided with a second water inlet (30a) and the other side being provided with a second water outlet (30b); A first electric control valve (40) provided on the side of the first water inlet (20a) or the first water outlet (20b); A second electric control valve (50) provided on the side of the second water inlet (30a) or the second water outlet (30b); A plurality of thermocouple thermometers (130) spaced apart within the reaction chamber (10a); A control module (70) electrically connected to the first electric control valve (40), the second electric control valve (50) and the plurality of thermocouple thermometers (130), to adjust the opening degrees of the first electric control valve (40) and the second electric control valve (50) according to the average value of the temperature values collected by the plurality of thermocouple thermometers (130).

2. The batch reactor according to claim 1, characterized in that, The reactor body (10) is further provided with a polymerization inhibitor inlet (10b) communicating with the reaction chamber (10a), and the polymerization inhibitor inlet (10b) is used for communicating with a polymerization inhibitor; The batch reactor further includes a third electric control valve (60), and the third electric control valve (60) is provided on the side of the polymerization inhibitor inlet (10b); the control module (70) is electrically connected to the third electric control valve (60) to control the opening and closing of the third electric control valve (60) according to the highest value of the temperature values collected by the plurality of thermocouple thermometers (130).

3. The batch reactor according to claim 2, characterized in that, The batch reactor further includes a first water inlet pipe (80), a first water outlet pipe (90), a second water inlet pipe (100), a second water outlet pipe (110) and a polymerization inhibitor feed pipe (120); one end of the first water inlet pipe (80) is communicated with the first water inlet (20a), and one end of the first water outlet pipe (90) is communicated with the first water outlet (20b); one end of the second water inlet pipe (100) is communicated with the second water inlet (30a), and one end of the second water outlet pipe (110) is communicated with the second water outlet (30b); one end of the polymerization inhibitor feed pipe (120) is communicated with the polymerization inhibitor inlet (10b); the first electric control valve (40) is provided on the first water outlet pipe (90), the second electric control valve (50) is provided on the second water outlet pipe (110), and the third electric control valve (60) is provided on the polymerization inhibitor feed pipe (120).

4. The batch reactor according to any one of claims 1-3, characterized in that, The reactor body (10) includes: A kettle body (11) and a kettle lid (12), the kettle lid (12) is detachably connected to the kettle body (11), and together with the kettle body (11) encloses to form the reaction chamber (10a); A stirrer (13), including a rotating rod (131), a turbine impeller (132) and a plurality of inclined impellers (133), one side of the rotating rod (131) is rotatably connected to the kettle lid (12), the inclined impellers (133) and the turbine impeller (132) are fixedly connected to the rotating rod (131), and the turbine impeller (132) is located between the plurality of inclined impellers (133).

5. The kettle reactor according to claim 4, characterized in that, The reactor body (10) further includes a baffle (14), the baffle (14) is fixedly arranged on the inner side wall of the kettle body (11), and the length direction of the baffle (14) is parallel to or at an angle to the axis of the rotating rod (131).

6. The kettle reactor according to claim 5, characterized in that, The stirrer (13) is provided with two of the inclined impellers (133) and one turbine impeller (132), the turbine impeller (132) is located between the two inclined impellers (133), the turbine impeller (132) is located in the middle of the reaction chamber (10a), and the two inclined impellers (133) are respectively located in the upper and lower parts of the reaction chamber (10a).

7. The kettle reactor according to claim 6, characterized in that, The inclined impeller (133) is provided with 4 blades, and the deflection angle of the blades is 45°.

8. A control method for a kettle reactor, characterized in that, This method is implemented based on the kettle reactor according to any one of claims 2-7, and this method includes the following steps: S100, set the minimum temperature value A, the maximum temperature value B and the runaway temperature value C in the reaction chamber (10a); S200, the control module (70) obtains the temperature values at various places in the reaction chamber (10a) through a plurality of the thermocouple thermometers (130); S300, the control module (70) obtains an average value D and a maximum value E based on the plurality of temperature values obtained in step S200; S400, the control module (70) controls the first electric control valve (40), the second electric control valve (50) and the third electric control valve (60) based on the average value D and the maximum value E: if A≤D≤B, then the first electric control valve (40), the second electric control valve (50) and the third electric control valve (60) do not act; if D≤A, then the control module (70) increases the opening degree of the second electric control valve (50) so that A≤D≤B; if D≥B, then the control module (70) increases the opening degree of the first electric control valve (40) so that A≤D≤B; if E≥C, then the control module (70) opens the third electric control valve (60); if E≤C, the third electric control valve (60) does not act and continues to be closed.

9. The control method for a kettle reactor according to claim 8, characterized in that, If D ≤ A, the control module (70) simultaneously reduces the opening degree of the first electronic control valve (40) or closes the first electronic control valve (40) to make A ≤ D ≤ B; If D ≥ B, the control module (70) simultaneously reduces the opening degree of the second electronic control valve (50) or closes the second electronic control valve (50) to make A ≤ D ≤ B.

10. The control method of the autoclave reactor according to claim 8, characterized in that If E ≥ C, the control module (70) simultaneously reduces the opening degree of the second electronic control valve (50) or closes the second electronic control valve (50), and increases the opening degree of the first electronic control valve (40).

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