A polymerization process final polymerization reactor

Abstract

The application discloses a polymerization process final polymerization reaction kettle, which comprises a horizontal kettle body and a stirring shaft installed on the kettle body, and further comprises a heat exchange pipeline installed at the bottom of the kettle body and surrounding the bottom of the kettle body, wherein the bottom of the kettle body is connected with the inner cavity of the heat exchange pipeline through a plurality of gas guide holes; a spraying pipe is installed at the top of the inner cavity of the kettle body, the bottom of the spraying pipe is provided with a spraying nozzle, a plurality of feeding ports are installed on the spraying pipe, and a control valve body is installed on each feeding port. The application has the advantages of high utilization rate of heat exchange gas, high temperature regulation efficiency, energy saving and environmental protection, high heat utilization rate, temperature rising and falling control of the polymer in the kettle, online regulation of the viscosity of the polymer in the kettle, uniform distribution of the polymer raw materials in the kettle, improvement of the component proportion of the polymer raw materials such as PDO, BDO and EG, reduction of the polymerization viscosity in the kettle, high utilization rate of the raw materials and high polymerization conversion rate in the kettle.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of final polymerization reactors, in particular to a final polymerization reactor for a polymerization process. BACKGROUND

[0002] In the petrochemical industry, the polymerization process is a relatively mature process. The last step of the polymerization process in the petrochemical industry is basically completed by a polycondensation reactor with stirring. The polycondensation reaction is stable, the catalyst has excellent performance and high efficiency, but the conversion rate of the raw material is limited. Because the polycondensation reactor is in a vacuum state, the light components in the reactor will be vaporized into the vacuum system due to the vacuum. The viscosity of the polymer in the reactor is difficult to adjust, and the conversion rate is low. In the polymerization process, the reaction temperature in the reactor needs to be adjusted. Usually, heating wires or circulating water are arranged on the outer ring of the reactor body to adjust the temperature. Because the heating assembly cannot directly contact the reaction material, the reactor body is heated first, and then the heat is transmitted to the reaction material in the reactor body. The temperature adjustment is not timely, the purpose of flexible adjustment of the reaction conditions of the raw material cannot be achieved, and a large amount of energy is consumed for temperature adjustment, which does not meet the current low-carbon and environmentally-friendly production requirements. SUMMARY

[0003] Therefore, it is necessary to provide a final polymerization reactor for a polymerization process in view of the above technical problems. The heat exchange pipeline is installed at the bottom of the reactor body and is in communication with the inner cavity of the reactor body through the gas guide holes. Hot nitrogen enters the final polymerization reactor from the heat exchange pipeline at the bottom of the reactor body. The hot nitrogen does not enter the vacuum system at the top of the inner cavity of the reactor body instantaneously. The utilization rate of the hot nitrogen is high, the temperature adjustment efficiency is high, energy saving and environmental protection are achieved, the temperature of the polymer in the reactor is controlled, the online viscosity adjustment of the polymer in the reactor is achieved, the quality of the polymer product is improved through the online viscosity adjustment, a plurality of polymer raw materials enter the spraying pipes at the top of the inner cavity of the reactor body through the feeding ports at the top, the addition time and the addition amount of the polymer raw materials can be flexibly controlled, the polymer raw materials are uniformly distributed in the reactor, the polymer raw materials are in more uniform contact with the polymer in the reactor, the component proportion of the polymer raw materials such as PDO, BDO and EG is improved, the polymerization viscosity in the reactor is reduced, the utilization rate of the raw material is high, and the polymerization conversion rate in the reactor is high.

[0004] In order to solve the above technical problems, the application adopts the technical scheme as follows:

[0005] A final polymerization reactor for a polymerization process comprises a horizontal reactor body and a stirring shaft installed on the reactor body, and further comprises:

[0006] A heat exchange pipeline is installed at the bottom of the reactor body and is installed in a surrounding manner at the bottom of the reactor body. The bottom of the reactor body is in communication with the inner cavity of the heat exchange pipeline through a plurality of gas guide holes.

[0007] The spray pipe is installed at the top of the inner cavity of the kettle body, the bottom of the spray pipe is provided with a spray nozzle, a plurality of feeding ports are installed on the spray pipe, and a control valve body is installed on each feeding port.

[0008] As a preferred embodiment of the polymerization process final polymerization reaction kettle, the inner cavity of the kettle body is provided with a stirring frame connected with the stirring shaft, the lower end of the stirring frame is attached to the bottom of the inner cavity of the kettle body, the stirring frame is composed of a plurality of frames, adjacent frames are connected in series through cross bars, the cross bars are fixed with stirring rods, when the stirring shaft rotates, the stirring frame will rotate synchronously through the synchronous sliding block, and the stirring frame can be controlled to move along the synchronous sliding block and move along the axial direction of the stirring shaft, the stirring frame rotates in the inner cavity of the kettle body through the rotation of the stirring shaft, thereby mixing and stirring the polymer raw materials, and the bottom of the stirring frame is attached to the bottom of the inner cavity of the kettle body, which can scrape off the polymer raw materials at the bottom of the kettle body, avoid uneven mixing of the polymer raw materials, improve the flowability of the polymer in the kettle, reduce the adhesion of the polymer to the kettle wall, and improve the flow condition of the polymer in the kettle, thereby effectively improving the mixing and mass transfer between materials, improving the conversion efficiency of the raw materials, and improving the product quality.

[0009] As a preferred embodiment of the polymerization process final polymerization reaction kettle, the stirring shaft is fixed with a synchronous sliding block along the axial direction, the stirring frame is slidingly connected with the stirring shaft along the synchronous sliding block, the stirring frame is fixed with a reset spiral vane which is sleeved with the stirring shaft, when the stirring shaft drives the stirring frame to rotate, the reset spiral vane on the stirring frame will rotate, and since the reset spiral vane is a spiral vane structure, it will provide a certain thrust to the stirring frame when rotating, thereby pushing the stirring frame to one side.

[0010] As a preferred embodiment of the polymerization process final polymerization reaction kettle, one side of the stirring frame is fixed with a side blocking ring, a side pushing pipe is arranged outside the side blocking ring, a cross pushing rod is inserted into the end of the side pushing pipe and connected with the side blocking ring, and a pressure relief hole one is formed in the end of the side pushing pipe, by arranging the cross pushing rod on one side of the side blocking ring, inputting gas into the side pushing pipe can gradually increase the internal pressure of the side pushing pipe, gradually push the cross pushing rod to one side of the side blocking ring, and push the stirring frame to move along the axial direction of the stirring shaft, thereby improving the mixing and stirring effect of the stirring frame and uniformly distributing the polymer raw materials such as PDO, BDO and EG in the kettle.

[0011] As a preferred embodiment of the polymerization process final polymerization reactor provided by the present application, the heat exchange pipeline is connected with the spray pipe through the branch pipeline, the branch pipeline is slidably inserted with the intercepting plate, the intercepting plate is provided with the flow-through groove matched with the inner cavity of the branch pipeline, and one side of the intercepting plate is connected with the guide rod two. The intercepting plate plays a role of cutting off the two ends of the branch pipeline and the spray pipe, and the flow-through groove is matched with the through hole of the branch pipeline by moving the intercepting plate, so that the purpose of controlling the communication between the branch pipeline and the spray pipe is realized. Through the communication between the branch pipeline and the spray pipe, after the inner cavity of the kettle body is quantitatively added with the polymer raw material through the feed inlet and the spray pipe, part of the gas in the heat exchange pipeline can enter the spray pipe through the branch pipeline, so that the raw material in the spray pipe is quickly discharged into the inner cavity of the kettle body through the spray nozzle, thereby avoiding the situation that the raw material is left in the inner cavity of the spray pipe.

[0012] As a preferred embodiment of the polymerization process final polymerization reactor provided by the present application, the heat exchange pipeline is connected with the spray pipe through the branch pipeline, the branch pipeline is slidably inserted with the intercepting plate, the intercepting plate is provided with the flow-through groove matched with the inner cavity of the branch pipeline, and one side of the intercepting plate is connected with the guide rod two. The intercepting plate plays a role of cutting off the two ends of the branch pipeline and the spray pipe, and the flow-through groove is matched with the through hole of the branch pipeline by moving the intercepting plate, so that the purpose of controlling the communication between the branch pipeline and the spray pipe is realized. Through the communication between the branch pipeline and the spray pipe, after the inner cavity of the kettle body is quantitatively added with the polymer raw material through the feed inlet and the spray pipe, part of the gas in the heat exchange pipeline can enter the spray pipe through the branch pipeline, so that the raw material in the spray pipe is quickly discharged into the inner cavity of the kettle body through the spray nozzle, thereby avoiding the situation that the raw material is left in the inner cavity of the spray pipe.

[0013] As a preferred embodiment of the polymerization process final polymerization reactor provided by the present application, the heat exchange pipeline is connected with the spray pipe through the branch pipeline, the branch pipeline is slidably inserted with the intercepting plate, the intercepting plate is provided with the flow-through groove matched with the inner cavity of the branch pipeline, and one side of the intercepting plate is connected with the guide rod two. The intercepting plate plays a role of cutting off the two ends of the branch pipeline and the spray pipe, and the flow-through groove is matched with the through hole of the branch pipeline by moving the intercepting plate, so that the purpose of controlling the communication between the branch pipeline and the spray pipe is realized. Through the communication between the branch pipeline and the spray pipe, after the inner cavity of the kettle body is quantitatively added with the polymer raw material through the feed inlet and the spray pipe, part of the gas in the heat exchange pipeline can enter the spray pipe through the branch pipeline, so that the raw material in the spray pipe is quickly discharged into the inner cavity of the kettle body through the spray nozzle, thereby avoiding the situation that the raw material is left in the inner cavity of the spray pipe.

[0014] As a preferred embodiment of the polymerization process final polymerization reactor provided by the present application, the heat exchange pipeline is connected with the spray pipe through the branch pipeline, the branch pipeline is slidably inserted with the intercepting plate, the intercepting plate is provided with the flow-through groove matched with the inner cavity of the branch pipeline, and one side of the intercepting plate is connected with the guide rod two. The intercepting plate plays a role of cutting off the two ends of the branch pipeline and the spray pipe, and the flow-through groove is matched with the through hole of the branch pipeline by moving the intercepting plate, so that the purpose of controlling the communication between the branch pipeline and the spray pipe is realized. Through the communication between the branch pipeline and the spray pipe, after the inner cavity of the kettle body is quantitatively added with the polymer raw material through the feed inlet and the spray pipe, part of the gas in the heat exchange pipeline can enter the spray pipe through the branch pipeline, so that the raw material in the spray pipe is quickly discharged into the inner cavity of the kettle body through the spray nozzle, thereby avoiding the situation that the raw material is left in the inner cavity of the spray pipe.

[0015] As a preferred embodiment of the polymeric process final polymerization reactor provided by the application, one side of each of the control valve bodies is provided with a communication pipe and a stop plate, a plurality of communication pipes are arranged between the branch pipes and the spray pipes, the communication pipes are arranged in correspondence with the stop plates, and each control valve body is provided with a communication pipe.

[0016] As a preferred embodiment of the polymeric process final polymerization reactor provided by the application, the side pushing pipe is connected with the branch pipe through the air duct two, and the air duct one is installed at the top of the kettle body, so that when the addition of raw materials is completed, the hot nitrogen gas is introduced into the side pushing pipe through the air duct two when the branch pipe and the spray pipe are controlled to be conducted by rotating the control valve body, and the horizontal pushing rod drives the stirring frame to move horizontally, so that the added polymer raw materials are quickly mixed and stirred, the inner cavity of the kettle body and the heat exchange pipe form a loop, and the hot nitrogen circulation is introduced.

[0017] Compared with the prior art, the application has the following beneficial effects:

[0018] The polymeric process final polymerization reactor provided by the application has the following advantages: the heat exchange pipe is installed at the bottom of the kettle body, the materials in the horizontal kettle body are located at the bottom, the gas for heat exchange, such as hot nitrogen, can be introduced through the heat exchange pipe, the hot nitrogen enters the final polymerization kettle from the bottom heat exchange pipe of the kettle body, the hot nitrogen does not enter the top vacuum system in the inner cavity of the kettle body instantaneously, the utilization rate of the hot nitrogen is high, the temperature regulation efficiency is high, energy saving and environmental protection are achieved, the temperature of the polymer in the kettle is controlled, the online adjustment of the viscosity of the polymer in the kettle is achieved, the quality of the polymer product is improved through the online adjustment of the viscosity, a plurality of polymer raw materials enter the spray pipes through the feed inlet at the top, enter the inner cavity of the kettle through the plurality of spray nozzles at the bottom of the spray pipes, the addition time and the addition amount of the polymer raw materials can be flexibly controlled, the polymer raw materials are uniformly distributed in the kettle, the polymer raw materials are more uniformly contacted with the polymer in the kettle, the component proportion of the polymer raw materials such as PDO, BDO and EG is improved, the polymerization viscosity in the kettle is reduced, the utilization rate of the raw materials is high, and the polymerization conversion rate in the kettle is high.

[0019] The polymeric process final polymerization reactor provided by the application can drive the stirring frame to rotate synchronously through the synchronous slider when the stirring shaft rotates, and can control the stirring frame to move along the synchronous slider and move along the axial direction of the stirring shaft, the stirring frame is fixed with reset helical blades which are sleeved with the stirring shaft, the reset helical blades on the stirring frame are driven to rotate when the stirring shaft drives the stirring frame to rotate, the reset helical blades provide a certain thrust to the stirring frame when rotating, so that the stirring frame is pushed to one side, a horizontal pushing rod is arranged on one side of the side retaining ring, the internal pressure of the side pushing pipe is gradually increased by inputting gas in the side pushing pipe, the horizontal pushing rod is gradually pushed to one side of the side retaining ring, and the stirring frame is moved along the axial direction of the stirring shaft, so that the mixing and stirring effect of the stirring frame is improved, the polymer raw materials such as PDO, BDO and EG are uniformly distributed in the reactor, when the rear end of the horizontal pushing rod moves to the position of the pressure relief hole, the gas in the side pushing pipe is discharged, the thrust received by the horizontal pushing rod is reduced, and the rotation of the reset helical blades reversely pushes the side retaining ring to move to the horizontal pushing rod to reset the horizontal pushing rod, so that the stirring frame is reciprocally moved through the interaction of the horizontal pushing rod and the reset helical blades to improve the mixing and stirring effect.

[0020] The polymeric process final polymerization reactor provided by the application can drive the stirring frame to rotate synchronously through the synchronous slider when the stirring shaft rotates, and can control the stirring frame to move along the synchronous slider and move along the axial direction of the stirring shaft, the stirring frame is fixed with reset helical blades which are sleeved with the stirring shaft, the reset helical blades on the stirring frame are driven to rotate when the stirring shaft drives the stirring frame to rotate, the reset helical blades provide a certain thrust to the stirring frame when rotating, so that the stirring frame is pushed to one side, a horizontal pushing rod is arranged on one side of the side retaining ring, the internal pressure of the side pushing pipe is gradually increased by inputting gas in the side pushing pipe, the horizontal pushing rod is gradually pushed to one side of the side retaining ring, and the stirring frame is moved along the axial direction of the stirring shaft, so that the mixing and stirring effect of the stirring frame is improved, the polymer raw materials such as PDO, BDO and EG are uniformly distributed in the reactor, when the rear end of the horizontal pushing rod moves to the position of the pressure relief hole, the gas in the side pushing pipe is discharged, the thrust received by the horizontal pushing rod is reduced, and the rotation of the reset helical blades reversely pushes the side retaining ring to move to the horizontal pushing rod to reset the horizontal pushing rod, so that the stirring frame is reciprocally moved through the interaction of the horizontal pushing rod and the reset helical blades to improve the mixing and stirring effect of the stirring frame. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the schemes in the application, the following will briefly introduce the drawings needed to be used in the embodiments, and obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to the drawings without any creative effort.

[0022] Figure 1 The overall structure schematic diagram provided by the application;

[0023] Figure 2 The side view of the stirring frame provided by the application;

[0024] Figure 3 The internal structure schematic diagram provided by the application;

[0025] Figure 4 The communication pipe and the stop plate structure schematic diagram provided by the application.

[0026] The mark in the drawing is as follows:

[0027] 1, kettle body; 2, heat exchange pipeline; 3, stirring shaft; 4, branch pipe; 5, feed inlet; 6, control valve body; 7, air pipe one; 8, air pipe two; 9, stirring frame; 10, side retaining ring; 11, side push pipe; 12, reset spiral blade; 13, stirring rod; 14, horizontal push rod; 15, spray pipe; 16, synchronous slider; 17, spray nozzle; 18, pressure relief hole one; 19, guide rod one; 20, communication pipe; 21, guide rod two; 22, reset spring; 23, flow-through groove; 24, pressure relief hole two; 25, stop board. Embodiment

[0028] In order to make the person skilled in the art better understand the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0029] As described in the background, the conversion rate of raw materials is limited, because the inside of the polycondensation kettle is in a vacuum state, the light components in the kettle will be gasified into the vacuum system due to the vacuum, the viscosity of the polymer in the kettle is difficult to adjust, the conversion rate is low, and more energy is consumed for temperature adjustment, which does not meet the current low-carbon and environmentally friendly production demand.

[0030] In order to solve this technical problem, the present application provides a polymerization process final polymerization kettle, which is applied to the technical field of final polymerization kettle.

[0031] Specifically, please refer to Figures 1 to 4 A polymerization process final polymerization kettle, comprising: a horizontal kettle body 1 and a stirring shaft 3 installed on the kettle body 1, further comprising:

[0032] A heat exchange pipeline 2 is installed at the bottom of the kettle body 1 and is installed around the bottom of the kettle body 1, and the bottom of the kettle body 1 is connected with the inner cavity of the heat exchange pipeline 2 through a plurality of gas guide holes;

[0033] A spray pipe 15 is installed at the top of the inner cavity of the kettle body 1, the bottom of the spray pipe 15 is provided with a spray nozzle 17, a plurality of feed inlets 5 are installed on the spray pipe 15, and a control valve body 6 is installed on each feed inlet 5.

[0034] The polymeric process final polymerization kettle provided by the application is characterized in that: a heat exchange pipeline 2 is installed at the bottom of the kettle body 1 and is communicated with the inner cavity of the kettle body 1 through a gas guide hole, the material in the horizontal kettle body 1 is at the bottom, the heat exchange gas such as hot nitrogen can be introduced through the heat exchange pipeline 2, the hot nitrogen enters the final polymerization kettle from the bottom heat exchange pipeline 2 of the kettle body 1, the hot nitrogen does not enter the vacuum system at the top of the inner cavity of the kettle body 1 instantaneously, the utilization rate of the hot nitrogen is high, the temperature adjustment efficiency is high, energy saving and environmental protection are achieved, the temperature of the polymer in the kettle is controlled, the on-line adjustment of the viscosity of the polymer in the kettle is achieved, the quality of the polymer product is improved through the on-line adjustment of the viscosity, a plurality of polymer raw materials enter the spray pipe 15 at the top of the inner cavity of the kettle body 1 through the top feed port 5, the addition time and the addition amount of the polymer raw materials can be flexibly controlled, the polymer raw materials enter the inner cavity of the kettle body 1 through the plurality of spray nozzles 17 at the bottom of the spray pipe 15, the polymer raw materials are uniformly distributed in the kettle and are in more uniform contact with the polymer in the kettle, the component proportion of the polymer raw materials such as PDO, BDO and EG is improved, the polymerization viscosity in the kettle is reduced, the utilization rate of the raw materials is high, and the polymerization conversion rate in the kettle is high.

[0035] In order for those skilled in the art to better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings.

[0036] It should be noted that the embodiments in the present application and the features and technical schemes in the embodiments can be combined with each other without conflict.

[0037] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. Embodiments

[0038] Please refer to Figures 1 to 4The utility model provides an end polymerization reaction kettle of polymerization process, include: horizontal kettle body 1 and install on the stirring shaft 3 of kettle body 1, the inner chamber of kettle body 1 is equipped with the stirring frame 9 connected with stirring shaft 3, the lower end of stirring frame 9 is in line with the inner chamber bottom of kettle body 1, the rotation of stirring shaft 3 drives stirring frame 9 to rotate in the inner chamber of kettle body 1 to carry out mixing and stirring to polymer raw materials, and the bottom of stirring frame 9 is in line with the inner chamber bottom of kettle body 1, can scrape off the polymer raw materials at the bottom of kettle body 1, avoid the uneven mixing of polymer raw materials deposition, can improve the flowability of polymer in kettle, have less polymer in the adhesion of kettle wall, and improve the flow condition of polymer in kettle, can effectively improve the mixing, mass transfer between materials, improve the conversion efficiency of raw materials, improve product quality, stirring frame 9 is composed of multiple frames, and adjacent frames are connected by cross bar, so that stirring frame 9 is an integral structure, which is convenient for adjusting the position of stirring frame 9, the stirring rod 13 is fixed on the cross bar, the synchronous sliding block 16 is fixed on the stirring shaft 3 along the axial direction, the stirring frame 9 is slidingly connected with the stirring shaft 3 along the synchronous sliding block 16, when the stirring shaft 3 rotates, the stirring frame 9 is driven to rotate synchronously by the synchronous sliding block 16, and the stirring frame 9 can be controlled to move along the synchronous sliding block 16 and move along the axial direction of the stirring shaft 3, the reset helical blade 12 is fixed on the stirring frame 9 and is sleeved with the stirring shaft 3, when the stirring shaft 3 drives the stirring frame 9 to rotate, the reset helical blade 12 on the stirring frame 9 is driven to rotate, since the reset helical blade 12 is a helical blade structure, when rotating, a certain thrust is provided to the stirring frame 9, so that the stirring frame 9 is pushed to one side.

[0039] It is worth mentioning that, as shown in Figure 3 , one side of the stirring frame 9 is fixed with a side blocking ring 10, a side pushing pipe 11 is arranged outside the side blocking ring 10, an end of the side pushing pipe 11 is inserted with a horizontal pushing rod 14 connected with the side blocking ring 10 at the end, and a pressure relief hole 1 8 is formed in the end of the side pushing pipe 11, by arranging the horizontal pushing rod 14 on one side of the side blocking ring 10, by inputting gas into the side pushing pipe 11, the internal pressure of the side pushing pipe 11 gradually increases, and gradually pushes the horizontal pushing rod 14 to one side of the side blocking ring 10, and pushes the stirring frame 9 to move along the axial direction of the stirring shaft 3, so as to improve the mixing and stirring effect of the stirring frame 9, so that the polymer raw materials such as PDO, BDO and EG are uniformly distributed in the kettle, when the rear end of the horizontal pushing rod 14 moves to the pressure relief hole 1 8, the gas in the side pushing pipe 11 is discharged, the thrust on the horizontal pushing rod 14 decreases, and the rotation of the reset helical blade 12 reversely pushes the side blocking ring 10 to move to the horizontal pushing rod 14 to reset the horizontal pushing rod 14, so as to reciprocate the stirring frame 9 by the interaction of the horizontal pushing rod 14 and the reset helical blade 12 to improve the stirring and mixing effect.

[0040] In addition, please refer to Figure 1 and Figure 3As shown, the heat exchange pipeline 2 is installed at the bottom of the kettle body 1, and is installed around the bottom of the kettle body 1, and the bottom of the kettle body 1 is connected with the inner cavity of the heat exchange pipeline 2 through a plurality of gas guide holes; the spray pipe 15 is installed at the top of the inner cavity of the kettle body 1, the bottom of the spray pipe 15 is provided with a spray nozzle 17, a plurality of feed ports 5 are installed on the spray pipe 15, and a control valve body 6 is installed on each feed port 5. By installing the heat exchange pipeline 2 at the bottom of the kettle body 1 and connecting the inner cavity of the kettle body 1 through the gas guide hole, the material in the horizontal kettle body 1 is at the bottom, and the gas used for heat exchange, such as hot nitrogen, can be introduced through the heat exchange pipeline 2. The utilization rate of hot nitrogen is high, the temperature regulation efficiency is high, it is energy-saving and environment-friendly, a plurality of polymer raw materials enter the spray pipe 15 located at the top of the inner cavity of the kettle body 1 through the feed ports 5 at the top, so that the polymer raw materials are uniformly distributed in the kettle, and the polymer in the kettle is more uniformly contacted, the component ratio of PDO, BDO, EG and other polymer raw materials is improved, the polymerization viscosity in the kettle is reduced, the utilization rate of raw materials is high, and the polymerization conversion rate in the kettle is high.

[0041] When the polymer raw material enters the spray pipe 15 through the feed port 5 and is quantitatively added to the inner cavity of the kettle body 1 through the spray nozzle 17, part of the raw material will remain in the inner cavity of the spray pipe 15 and cannot be added to the kettle body 1, so that the component ratio of the polymer raw material has an error, which affects the product preparation. Therefore, the following examples are given: Example

[0042] In this embodiment, as shown in Figure 1 and Figure 4 As shown, the heat exchange pipeline 2 is connected with the spray pipe 15 through the branch pipe 4, the branch pipe 4 is slidably inserted with a stop plate 25 along the radial direction, the stop plate 25 is provided with a flow-through groove 23 matched with the inner cavity of the branch pipe 4, and one side of the stop plate 25 is connected with a guide rod two 21. The stop plate 25 plays a role of cutting off the two ends of the branch pipe 4 and the spray pipe 15, and by moving the stop plate 25, the flow-through groove 23 is matched with the through hole of the branch pipe 4, so as to realize the purpose of controlling the communication between the branch pipe 4 and the spray pipe 15. By connecting the branch pipe 4 with the spray pipe 15, after the polymer raw material is quantitatively added to the inner cavity of the kettle body 1 through the feed port 5 and the spray pipe 15, part of the gas in the heat exchange pipeline 2 can enter the spray pipe 15 through the branch pipe 4, so as to quickly discharge the raw material in the spray pipe 15 into the inner cavity of the kettle body 1 through the spray nozzle 17, thereby avoiding the situation that the raw material remains in the inner cavity of the spray pipe 15.

[0043] In addition, as shown in Figure 4As shown, one end of the communication pipe 20 is inserted with the guide rod one 19, the other end of the communication pipe 20 is inserted with the guide rod two 21, the end of the rotating shaft of the control valve body 6 is connected with the guide rod one 19 through the gear and rack set, the end of the communication pipe 20 close to the guide rod two 21 is provided with the pressure relief hole two 24, the guide rod two 21 and the guide rod one 19 are both inserted with the insertion rod and the communication pipe 20, the end of the insertion rod on the communication pipe 20 is installed with the reset spring 22, when the feeding port 5 is filled with materials, the passage of the feeding port 5 is closed by rotating the control valve body 6, at this time, the control valve body 6 is rotated and the guide rod one 19 is moved by the gear and rack set, the guide rod one 19 moves to the inner cavity of the communication pipe 20, so as to increase the inner cavity pressure of the communication pipe 20, so as to move the guide rod two 21 at the other end of the communication pipe 20, move the intercepting plate 25 and the flow-through groove 23, so as to connect the branch pipe 4 and the spraying pipe 15, push the residual materials in the spraying pipe 15 into the inner cavity of the kettle body 1, so that the polymer raw material component ratio meets the preparation requirements, at this time, the tail end of the guide rod two 21 moves to the pressure relief hole two 24, the gas of the communication pipe 20 is slowly relieved through the pressure relief hole two 24, and the intercepting plate 25 is slowly pulled back by the guide rod two 21 through the action of the reset spring 22, so that the branch pipe 4 and the spraying pipe 15 can be connected and then closed in the set time, when the control valve body 6 is rotated to open the passage of the feeding port 5 and reset the guide rod two 21, the above operation can be repeated. Embodiment

[0044] The polymerization process final polymerization reactor provided in embodiment 2 is further optimized, like Figure 1 and Figure 3As shown, one side of each control valve body 6 is provided with a communication pipe 20 and a stop plate 25, a plurality of communication pipes 20 are arranged between the branch pipe 4 and the spray pipe 15, the communication pipes 20 are arranged in correspondence with the stop plates 25, the control valve body 6 is arranged in correspondence with the communication pipe 20, the raw material is added through the feed port 5 each time, the control valve body 6 is closed, and the raw material in the inner cavity of the spray pipe 15 is quickly discharged into the inner cavity of the kettle body 1, so that the proportion of the polymer raw material components meets the preparation requirements, the side push pipe 11 is connected with the branch pipe 4 through the air duct two 8, when the branch pipe 4 and the spray pipe 15 are conducted through the rotation of the control valve body 6, hot nitrogen gas enters the side push pipe 11 through the air duct two 8, and drives the horizontal push rod 14 to move horizontally, so that the added raw material is quickly mixed and stirred, the air duct one 7 is installed at the top of the kettle body 1, the inner cavity of the kettle body 1 and the heat exchange pipe 2 form a loop through the installed air duct one 7, and hot nitrogen is conveniently circulated and introduced.

[0045] The use process of the polymerization process final polymerization kettle provided by the application is as follows: the heat exchange pipe 2 is installed at the bottom of the kettle body 1 and is communicated with the inner cavity of the kettle body 1 through the gas guide hole, the material in the horizontal kettle body 1 is at the bottom, the gas used for heat exchange, such as hot nitrogen, can be introduced through the heat exchange pipe 2, the hot nitrogen enters the final polymerization kettle from the bottom heat exchange pipe 2 of the kettle body 1, the utilization rate of the hot nitrogen is high, the plurality of polymer raw materials enter the spray pipes 15 located at the top of the inner cavity of the kettle body 1 through the feed ports 5 at the top, the addition time and the addition amount of the polymer raw materials are flexibly controlled, and the polymer raw materials are evenly distributed in the kettle through the plurality of spray nozzles 17 at the bottom of the spray pipe 15.

[0046] In the application, unless otherwise clearly specified and limited, the terms "installation", "connection", "linkage", "fixation" and the like should be understood in a broad sense, for example, can be fixed connection, can be detachable connection, or can be integrated; can be mechanical connection, or can be electrical connection or communication with each other; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For ordinary skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0047] Obviously, the above-described embodiments are only some embodiments but not all the embodiments of the present application, the preferred embodiments of the present application are shown in the drawings, but do not limit the patent scope of the present application. The present application can be implemented in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing specific embodiments, or make equivalent replacements to some technical features therein. Any equivalent structure made by using the content of the present application specification and drawings, directly or indirectly applied to other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A final polymerization reactor for a polymerization process, comprising: The horizontal vessel body (1) and the stirring shaft (3) mounted on the vessel body (1) are characterized in that they further include: The heat exchange pipe (2) is installed at the bottom of the vessel body (1) and is installed around the bottom of the vessel body (1). The bottom of the vessel body (1) is connected to the inner cavity of the heat exchange pipe (2) through several air guide holes. A spray pipe (15) is installed at the top of the inner cavity of the vessel body (1). A spray nozzle (17) is installed at the bottom of the spray pipe (15). A plurality of feed inlets (5) are installed on the spray pipe (15), and a control valve body (6) is installed on each feed inlet (5). The inner cavity of the vessel body (1) is equipped with a stirring frame (9) connected to the stirring shaft (3). The lower end of the stirring frame (9) is attached to the bottom of the inner cavity of the vessel body (1). The stirring frame (9) is composed of multiple frames, and adjacent frames are connected in series by a crossbar. A stirring rod (13) is fixed on the crossbar. A synchronous slider (16) is fixed along the axial direction on the stirring shaft (3), and the stirring frame (9) is slidably connected to the stirring shaft (3) along the synchronous slider (16). A reset spiral blade (12) is fixed on the stirring frame (9) and sleeved with the stirring shaft (3). A side baffle ring (10) is fixed on one side of the stirring frame (9), and a side push tube (11) is provided on the outside of the side baffle ring (10). A horizontal push rod (14) with its end connected to the side baffle ring (10) is inserted into the end of the side push tube (11), and a pressure relief hole (18) is opened at the end of the side push tube (11). The heat exchange pipe (2) is connected to the spray pipe (15) through a branch pipe (4). A stop plate (25) is slidably inserted into the branch pipe (4) in the radial direction. A flow groove (23) matching the inner cavity of the branch pipe (4) is opened on the stop plate (25). A guide rod (21) is connected to one side of the stop plate (25). A connecting pipe (20) is provided, with a guide rod (19) inserted at one end and a guide rod (21) inserted at the other end. The shaft end of the control valve body (6) is connected to the guide rod (19) through a gear and rack assembly. A pressure relief hole (24) is provided at the end of the connecting pipe (20) near the guide rod (21). The second guide rod (21) and the first guide rod (19) are both connected to the connecting pipe (20) by inserting a rod. A return spring (22) is installed at the end of the insert rod located on the connecting pipe (20). A connecting pipe (20) and a stop plate (25) are provided on one side of each control valve body (6). Multiple connecting pipes (20) are provided between the branch pipe (4) and the spray pipe (15). The connecting pipes (20) and the stop plates (25) are provided in correspondence. The side push pipe (11) is connected to the branch pipe (4) through the second ventilation pipe (8), and the top of the vessel body (1) is equipped with the first ventilation pipe (7).

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