Filling method of polymerization reaction stabilizer

Abstract

The invention relates to a method for filling a polymerization reaction stabilizer. The method comprises the following steps: conveying an antistatic agent into a dilution container; delivering a diluent into a dilution container; in a dilution container, an antistatic agent and a diluent are mixed, and a mixed solution is obtained; and conveying the mixed solution into a polymerization reaction vessel.

Description

Technical Field

[0001] The invention relates to the technical field of liquid filling, and in particular to a filling method of a polymerization reaction stabilizer. Background Art

[0002] At present, in the related technology, a large amount of static electricity is generated during the operation of the fluidized bed reactor of the polyethylene device. Antistatic agents are usually added to the polymerization reactor to improve the conductivity of the polymerization system, so that the static electricity generated during the polymerization process can be eliminated in time and the accumulation of static electricity can be reduced. However, the antistatic agent has poor fluidity in a low temperature environment. The method of directly adding the antistatic agent to the polymerization reactor results in that the antistatic agent cannot be stably added to the polymerization reactor. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] In view of this, a first aspect of the present invention provides a method for adding a polymerization reaction stabilizer.

[0005] Specifically, the present invention is achieved through the following technical solutions: According to a first aspect of the present invention, a method for filling a polymerization reaction stabilizer is provided, comprising: conveying an antistatic agent into a dilution container; conveying a diluent into a dilution container; in the dilution container, mixing the antistatic agent and the diluent to obtain a mixed solution; and conveying the mixed solution into a polymerization reaction container.

[0006] In this embodiment, the filling method of the polymerization stabilizer includes: conveying the antistatic agent to the dilution container; conveying the diluent to the dilution container, and then realizing that both the antistatic agent and the diluent are conveyed to the dilution container, in the dilution container, the antistatic agent and the diluent are mixed together, so that a mixed solution can be obtained; conveying the mixed solution to the polymerization reaction container, so that the mixed solution can eliminate the static electricity generated by the polymerization reaction container during the polymerization process, reduce the enrichment of static electricity, thereby maintaining the stability of the polymerization process, and enable the polymerization device to operate stably for a long time, and produce stable and high-quality products. The present application mixes the antistatic agent and the diluent together for filling, and then dilutes the antistatic agent, so that the diluted antistatic agent can increase fluidity, thereby solving the technical problem that the antistatic agent has poor fluidity in a low temperature environment, resulting in difficulty in filling, and the diluted antistatic agent can ensure the dispersibility of the antistatic agent, effectively eliminating the static electricity generated during the operation of the polymerization reaction container.

[0007] In addition, the filling method in the above embodiment provided by the present invention may also have the following additional technical features: In some embodiments of the present invention, before the antistatic agent is transported to the dilution container, the filling method further includes: placing the antistatic agent in a storage container; and performing heat preservation treatment on the antistatic agent in the storage container.

[0008] In this embodiment, before the antistatic agent is transported to the dilution container, the antistatic agent is placed in a storage container to store the antistatic agent, so that the storage container can store the antistatic agent, and avoid the antistatic agent being directly exposed to the external space, which causes the temperature of the antistatic agent to decrease, thereby preventing the antistatic agent from being too low in temperature and reducing the fluidity of the antistatic agent. Before the antistatic agent is added to the dilution container, the antistatic agent is heat-insulated in the storage container to prevent the antistatic agent from being difficult to add to the dilution container due to the excessive viscosity of the antistatic agent. Therefore, by placing the antistatic agent in the storage container for heat-insulation, the fluidity of the antistatic agent during filling can be increased, thereby improving the filling efficiency of the antistatic agent.

[0009] In some embodiments of the present invention, before conveying the antistatic agent to the dilution container, the filling method further comprises: pre-treating the antistatic agent to reduce the water content in the antistatic agent.

[0010] In this embodiment, since the antistatic agent absorbs moisture in the air during transportation, the antistatic agent with too much moisture will affect the polymerization reaction. Therefore, before the antistatic agent is transported to the dilution container, the antistatic agent is pretreated. The pretreatment reduces the water content in the antistatic agent, thereby preventing the antistatic agent from forming a mixed solution and entering the polymerization reaction container to affect the polymerization reaction, thereby ensuring that the antistatic agent can remove static electricity in the polymerization reaction container without affecting the polymerization reaction.

[0011] In some embodiments of the present invention, the antistatic agent is pretreated to reduce the water content in the antistatic agent, including: using 5A molecular sieve to adsorb the water in the antistatic agent.

[0012] In this embodiment, the specific method of reducing the water content in the antistatic agent by pretreating the antistatic agent is: using 5A molecular sieve to adsorb the moisture in the antistatic agent. Since 5A molecular sieve has the characteristics of high adsorption and fast adsorption speed, the method of using 5A molecular sieve to absorb moisture can greatly reduce the water content in the antistatic agent.

[0013] In some embodiments of the present invention, after pre-treating the antistatic agent to reduce the water content in the antistatic agent, the filling method further includes: drying the antistatic agent.

[0014] In this embodiment, the antistatic agent is pretreated to reduce the water content in the antistatic agent, and then the antistatic agent is dried, so that the moisture can be removed again before the antistatic agent enters the dilution container, thereby avoiding excessive moisture in the antistatic agent from being injected into the polymerization reaction container and causing adverse effects on the reaction activity.

[0015] In some embodiments of the present invention, delivering the diluent to the dilution container includes: determining the content of the diluent added to the dilution container according to the content of the antistatic agent in the dilution container.

[0016] In this embodiment, since the amount of antistatic agent added needs to be precisely controlled during the polymerization reaction, the amount of mixed solution added to the polymerization reaction container must be accurate. Therefore, in the process of transporting the diluent to the dilution container, the content of the diluent added to the dilution container is determined according to the content of the antistatic agent in the dilution container, so that the content of the diluent can be determined, and the amount of the mixed solution added can be determined, thereby achieving accuracy in the filling of the mixed solution.

[0017] In some embodiments of the present invention, determining the content of the diluent added to the dilution container according to the content of the antistatic agent in the dilution container includes: weighing a first mass of the antistatic agent delivered to the dilution container; and determining a second mass of the diluent according to the first mass.

[0018] In this embodiment, the specific method of determining the content of the diluent added to the dilution container according to the content of the antistatic agent in the dilution container includes: weighing the first mass of the antistatic agent delivered to the dilution container to obtain the weight of the antistatic agent, and then determining the second mass of the diluent by the weight of the antistatic agent, and adding the second mass of the diluent into the dilution container to achieve the purpose of accurately controlling the amount of diluent added, thereby achieving the accuracy of the dilution concentration of the antistatic agent.

[0019] In some embodiments of the present invention, the dilution container is provided with a first flow detection device and a first flow regulation device. After determining the second mass of the diluent according to the first mass, it includes: transporting the second mass of the diluent to the dilution container according to the first flow detection device and the first flow regulation device.

[0020] In this embodiment, the dilution container is provided with a first flow detection device and a first flow regulation device. By providing the first flow detection device and the first flow regulation device, the second mass of diluent can be delivered to the dilution container by adjusting the first flow detection device and the first flow regulation device, thereby improving the accuracy of diluent filling, thereby achieving the accuracy of the dilution concentration of the antistatic agent.

[0021] In some embodiments of the present invention, the antistatic agent and the diluent are mixed to obtain a mixed solution, which includes: stirring the antistatic agent and the diluent in a dilution container for a preset time.

[0022] In this embodiment, the antistatic agent and the diluent are respectively added into the dilution container, and the antistatic agent and the diluent in the dilution container are stirred for a preset time, so that the antistatic agent and the diluent form a mixed solution to achieve dilution of the antistatic agent, and by continuously stirring the mixed solution formed by the antistatic agent and the diluent, it is possible to prevent the mixed solution from stratifying and the filling amount from varying. Therefore, by stirring the antistatic agent and the diluent for a preset time, it is possible to ensure that the antistatic agent and the diluent are fully integrated, thereby achieving sufficient dilution of the antistatic agent.

[0023] In some embodiments of the present invention, the mixed solution is transported to the polymerization reaction container, including: using a filling pump to extract the mixed solution in the dilution container; adjusting the pressure of the mixed solution; when the pressure of the mixed solution reaches a first pressure threshold, the filling pump transports the mixed solution to the polymerization reaction container.

[0024] In this embodiment, the mixed solution in the dilution container is extracted by a filling pump, and then the mixed solution in the dilution container can be transported, so that the mixed solution can be added to the polymerization reaction container to adjust the pressure of the mixed solution; when the pressure of the mixed solution reaches a first pressure threshold, the filling pump transports the mixed solution to the polymerization reaction container, and the pressure of the mixed solution is adjusted by the filling pump, thereby ensuring that the mixed solution in the dilution container can enter the polymerization reaction container to achieve the filling of the mixed solution.

[0025] In some embodiments of the present invention, the first pressure threshold is greater than 2200 kPa and less than or equal to 2400 kPa.

[0026] In this embodiment, the pressure of the mixed solution is regulated by setting the first pressure threshold to be greater than 2200 kPa and less than or equal to 2400 kPa, and the first pressure threshold is set to 2200 kPa to 2400 kPa to ensure that the mixed solution in the dilution container can enter the polymerization reaction container to achieve the filling of the mixed solution.

[0027] In some embodiments of the present invention, after the mixed solution is transported to the polymerization reaction container, the filling method further includes: detecting a first pressure value at an outlet of the filling pump; and closing the outlet of the filling pump when the first pressure value is less than or equal to a second pressure threshold.

[0028] In this embodiment, after the mixed solution is transported to the polymerization reaction container, the first pressure value at the filling pump outlet is detected. When the first pressure value is less than or equal to the second pressure threshold, that is, the pressure at the filling pump outlet is lower than the normal value at this time, the filling pump outlet needs to be stopped to stop filling the mixed solution into the polymerization reaction container, thereby preventing the medium in the polymerization reaction container from flowing back into the pipeline for injecting the mixed solution into the polymerization reaction container and causing pipeline blockage.

[0029] In some embodiments of the present invention, after the filling pump delivers the mixed solution to the polymerization reaction container, the filling method further includes: detecting a filling speed of the mixed solution entering the polymerization reaction container; and determining an injection amount of the mixed solution according to the filling speed.

[0030] In this embodiment, after the filling pump delivers the mixed solution to the polymerization reaction container, the filling speed of the mixed solution entering the polymerization reaction container is detected, and the injection amount of the mixed solution is determined according to the filling speed, thereby ensuring the accuracy of the filling amount of the mixed solution containing the antistatic agent. By accurately controlling the filling amount of the mixed solution, the purpose of controlling the static electricity in the reactor can be achieved.

[0031] In some embodiments of the present invention, after the mixed solution is transported into the polymerization reaction container, the filling method further comprises: transporting reaction raw materials into the polymerization reaction container, and mixing the reaction raw materials with the mixed solution.

[0032] In this embodiment, after the mixed solution is transported to the polymerization reaction container, the reaction raw materials are transported to the polymerization reaction container, and the reaction raw materials are mixed with the mixed solution, so that the mixed solution containing the antistatic agent can improve the conductivity in the polymerization system, eliminate the static electricity generated in the polymerization process in time, and reduce the accumulation of static electricity, thereby maintaining the stability of the polymerization process, allowing the polymerization device to operate stably for a long time and produce stable and high-quality resin products.

[0033] In some embodiments of the present invention, the ratio of the injection amount of the antistatic agent in the mixed solution delivered to the polymerization reaction container to the injection amount of the reaction raw materials delivered to the polymerization reaction container is greater than or equal to 0.002% and less than or equal to 0.01%.

[0034] In this embodiment, the ratio of the injection amount of the antistatic agent in the mixed solution delivered to the polymerization reaction container to the injection amount of the reaction raw materials delivered to the polymerization reaction container is greater than or equal to 0.002% and less than or equal to 0.01%, thereby achieving control of the injection amount of the mixed solution. The purpose of controlling the static electricity in the reactor is achieved by setting the ratio of the injection amount of the antistatic agent in the mixed solution delivered to the polymerization reaction container to the injection amount of the reaction raw materials delivered to the polymerization reaction container to 0.002% to 0.01%.

[0035] In some embodiments of the present invention, the temperature of the antistatic agent in the storage container is greater than or equal to 30°C and less than or equal to 40°C.

[0036] In this embodiment, the temperature of the antistatic agent in the storage container is greater than or equal to 30°C and less than or equal to 40°C to achieve the adjustment of the heating temperature of the antistatic agent. By setting the temperature of the antistatic agent in the storage container to 30°C to 40°C, it is possible to prevent difficulties in filling due to excessive viscosity of the antistatic agent during filling.

[0037] In some embodiments of the present invention, the heat preservation time of the antistatic agent is greater than or equal to 6 hours and less than or equal to 10 hours.

[0038] In this embodiment, the heat preservation time of the antistatic agent is greater than or equal to 6 hours and less than or equal to 10 hours, so as to adjust the heat preservation or heating time of the antistatic agent before it is added to the dilution container. By setting the heat preservation time of the antistatic agent to 6 hours to 10 hours, the fluidity of the antistatic agent during filling can be improved, the viscosity of the antistatic agent can be reduced, and the filling difficulty caused by the excessive viscosity of the antistatic agent can be prevented, so as to facilitate the filling of the antistatic agent.

[0039] In some embodiments of the present invention, in the mixed solution, the concentration of the antistatic agent is greater than or equal to 10% and less than or equal to 20%.

[0040] In this embodiment, the concentration of the antistatic agent in the mixed solution is greater than or equal to 10% and less than or equal to 20%, so as to adjust the concentration of the antistatic agent in the mixed solution. The concentration of the antistatic agent solution is very important. If the concentration is too high, the fluidity of the solution will not be improved enough, affecting the injection. If the concentration is too low, the amount of solution added will be too large, resulting in the accumulation of recombinant components. By setting the concentration of the antistatic agent to 10% to 20%, the fluidity of the antistatic agent after dilution can be increased, avoiding the phenomenon of difficulty in filling during the filling process.

[0041] In some embodiments of the present invention, the antistatic agent and the diluent are stirred by a stirrer.

[0042] In this embodiment, the antistatic agent and the diluent are stirred by a stirrer, so that the antistatic agent and the diluent respectively added into the dilution container can be fully mixed together, so that the mixed solution will be stratified. In addition, the antistatic agent and the diluent are stirred by a stirrer, so that the formation of the mixed solution is more convenient and quick.

[0043] In some embodiments of the present invention, the diluent is isopentane.

[0044] In this embodiment, isopentane is an inert component for the polymerization reaction. Therefore, by setting the diluent to isopentane, the polymerization reaction will not be adversely affected after being injected into the polymerization reaction vessel. The dilution concentration of isopentane is moderate, taking into account the fluidity of the solution and the operation requirements of the polymerization reaction vessel. The problem of poor fluidity of the pure antistatic agent is solved, the dispersibility of the antistatic agent can be guaranteed, and the static electricity generated during the operation of the fluidized bed reactor is effectively eliminated.

[0045] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0048] Figure 1 One of the flow charts of a filling method according to an embodiment of the present invention is shown; Figure 2 A second flowchart of a filling method according to an embodiment of the present invention is shown; Figure 3 A third flowchart of a filling method according to an embodiment of the present invention is shown; Figure 4 A fourth flowchart of a filling method according to an embodiment of the present invention is shown; Figure 5 A fifth flowchart of a filling method according to an embodiment of the present invention is shown; Figure 6 A sixth flowchart of a filling method according to an embodiment of the present invention is shown; Figure 7 A schematic diagram of a process flow of an antistatic agent dilution system according to an embodiment of the present invention is shown; Figure 8 A schematic flow chart of an antistatic agent dilution system according to an embodiment of the present invention is shown.

[0049] in, Figure 7 and Figure 8 The corresponding relationship between the reference numerals and component names in the figure is: 102 antistatic agent, 104 diluent, 106 drying bed, 108 dilution container, 110 filling pump, 112 polymerization reaction container, 114 storage container, 116 first pipeline, 118 refining tank, 120 buffer container, 122 pneumatic isolation valve, M agitator, LE1 first liquid level display component, LE2 second liquid level display component, PV1 first pressure regulating valve, PV2 second pressure regulating valve, FV flow valve, FE1 first flow regulating valve, FE2 second flow regulating valve, FL pressure regulator. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] Refer to the following Figures 1 to 8 A method for injecting a polymerization reaction stabilizer according to some embodiments of the present invention is described.

[0052] The first aspect of the present invention provides a method for adding a polymerization stabilizer, such as Figure 1 As shown, the filling methods include: S202, transporting the antistatic agent 102 to the dilution container 108; S204, conveying the diluent 104 into the dilution container 108; S206, in the dilution container 108, the antistatic agent 102 and the diluent 104 are mixed to obtain a mixed solution; S208, transporting the mixed solution to the polymerization reaction vessel 112.

[0053] In this embodiment, the filling method of the polymerization reaction stabilizer includes: conveying the antistatic agent 102 to the dilution container 108; conveying the diluent 104 to the dilution container 108, and then conveying both the antistatic agent 102 and the diluent 104 to the dilution container 108, and mixing the antistatic agent 102 and the diluent 104 together in the dilution container 108, so as to obtain a mixed solution; conveying the mixed solution to the polymerization reaction container 112, so that the mixed solution can eliminate the static electricity generated in the polymerization reaction container 112 during the polymerization process, reduce the enrichment of static electricity, thereby maintaining the stability of the polymerization process, and enabling the polymerization device to operate stably for a long time and produce stable and high-quality products. The present application mixes the antistatic agent 102 and the diluent 104 together for filling, thereby diluting the antistatic agent 102, so that the diluted antistatic agent 102 can increase fluidity, thereby solving the technical problem that the antistatic agent 102 has poor fluidity in a low temperature environment, resulting in difficulty in filling, and the diluted antistatic agent 102 can ensure the dispersibility of the antistatic agent 102, and effectively eliminate the static electricity generated during the operation of the polymerization reaction container 112.

[0054] Specifically, the diluent 104 is isopentane.

[0055] Specifically, the antistatic agent 102 is an ionic liquid type polymer stabilizer.

[0056] Specifically, a large amount of static electricity will be generated during the operation of the fluidized bed reactor of the polyethylene device. If the static electricity fluctuates greatly, the polyethylene fine powder and catalyst particles in the reactor are easily adsorbed onto the reactor wall to form a non-fluidized layer. The fine powder containing the catalyst continues to react here. Due to the loss of fluidization, the heat of the polymerization reaction cannot be discharged, which will cause the non-fluidized layer to melt and form flakes. When the flakes hanging on the wall grow to a certain thickness and fall on the distribution plate, they are easy to block the distribution plate, thereby affecting the fluidization state of the reaction bed and blocking the reactor distribution plate or the discharge system. Long-term high static electricity fluctuations will deteriorate the fluidization state, and the reactor may even be forced to stop for manual cleaning. At present, the polymerization process usually adds an ionic liquid type polymerization stabilizer to the polymerization reaction vessel 112 to improve the conductivity of the polymerization system, eliminate the static electricity generated during the polymerization process in time, reduce the enrichment of static electricity, thereby maintaining the stability of the polymerization process, and enabling the polymerization device to operate stably for a long time and produce stable and high-quality resin products. The main components of the ionic liquid type polymerization stabilizer are: organic ammonium salt, castor oil, long-chain alkylbenzene sulfonic acid, n-heptane, cyclohexane, petroleum ether, etc. Since the viscosity of ionic liquid type polymerization stabilizer is relatively large, the fluidity is very poor in low temperature environment, which makes the continuity of ionic liquid type polymerization stabilizer filling worse in winter, the reactor appears flaking, and even forced to stop. The present application mixes the antistatic agent 102 and the diluent 104 together for filling, and then dilutes the antistatic agent 102, so that the diluted antistatic agent 102 can increase the fluidity, thereby solving the problem of poor fluidity and unstable injection of ionic liquid type polymerization stabilizer in low temperature environment.

[0057] In addition, the filling method in the above embodiment provided by the present invention may also have the following additional technical features: In some embodiments of the present invention, Figure 2 As shown, the filling method also includes: S302, placing the antistatic agent 102 in the storage container 114; S304, heat-insulating the antistatic agent 102 in the storage container 114; S306, transporting the antistatic agent 102 to the dilution container 108; S308, conveying the diluent 104 into the dilution container 108; S310, in the dilution container 108, mixing the antistatic agent 102 and the diluent 104 to obtain a mixed solution; S312, transporting the mixed solution to the polymerization reaction container 112.

[0058] In this embodiment, before the antistatic agent 102 is transported to the dilution container 108, the antistatic agent 102 is placed in the storage container 114 to store the antistatic agent 102, so that the storage container 114 can store the antistatic agent 102, and avoid the antistatic agent 102 being directly exposed to the external space, which causes the temperature of the antistatic agent 102 to decrease, thereby preventing the antistatic agent 102 from being too low and reducing the fluidity of the antistatic agent 102. Before the antistatic agent 102 is added to the dilution container 108, the antistatic agent 102 is heat-insulated in the storage container 114, which can prevent the difficulty of filling the antistatic agent 102 into the dilution container 108 due to the excessive viscosity of the antistatic agent 102. Therefore, by placing the antistatic agent 102 in the storage container 114 for heat-insulation, the fluidity of the antistatic agent 102 during filling can be increased, thereby improving the filling efficiency of the antistatic agent 102.

[0059] Specifically, the storage container 114 is a warm room, and hot water is used to maintain the temperature in the warm room at 30° C. to 40° C. Before the antistatic agent 102 is added, the barrel storing the antistatic agent 102 is placed in the warm room to heat up, so as to prevent the difficulty of filling due to the excessive viscosity of the antistatic agent 102 during filling, and ensure that the antistatic agent 102 is smoothly filled from the packaging iron barrel into the dilution container 108, thereby ensuring the accuracy of the dilution concentration of the antistatic agent 102.

[0060] In some embodiments of the present invention, Figure 3 As shown, the filling method also includes: S402, placing the antistatic agent 102 in the storage container 114; S404, performing heat preservation treatment on the antistatic agent 102 in the storage container 114; S406, pre-treating the antistatic agent 102 to reduce the water content in the antistatic agent 102; S408, transporting the antistatic agent 102 to the dilution container 108; S410, conveying the diluent 104 into the dilution container 108; S412, in the dilution container 108, mixing the antistatic agent 102 and the diluent 104 to obtain a mixed solution; S414, transporting the mixed solution to the polymerization reaction vessel 112.

[0061] In this embodiment, since the antistatic agent 102 absorbs moisture in the air during transportation, the antistatic agent 102 with too much moisture will affect the polymerization reaction. Therefore, before the antistatic agent 102 is transported to the dilution container 108, the antistatic agent 102 is pretreated. The water content in the antistatic agent 102 is reduced by the pretreatment, thereby preventing the antistatic agent 102 from forming a mixed solution and entering the polymerization reaction container 112 to affect the polymerization reaction, thereby ensuring that the antistatic agent 102 can remove static electricity in the polymerization reaction container 112 without affecting the polymerization reaction.

[0062] Specifically, the pretreatment includes a refining treatment, so that the water content in the antistatic agent 102 can be reduced.

[0063] Specifically, since the antistatic agent 102 contains alkylbenzene sulfonic acid, which is a substance that easily absorbs water, in order to prevent the antistatic agent 102 from absorbing moisture in the air during transportation and storage, and causing an adverse effect on the reaction activity after being injected into the polymerization reaction container 112, the antistatic agent 102 is refined before being added to the antistatic agent 102 dilution buffer tank to reduce the water content therein, thereby ensuring that the water content of the system meets the requirements of the polymerization reaction container 112.

[0064] In some embodiments of the present invention, the antistatic agent 102 is pretreated to reduce the water content in the antistatic agent 102 , including: using 5A molecular sieve to adsorb the water in the antistatic agent 102 .

[0065] In this embodiment, the specific method of reducing the water content in the antistatic agent 102 by pre-treating the antistatic agent 102 is: using 5A molecular sieve to adsorb the moisture in the antistatic agent 102. Since 5A molecular sieve has the characteristics of high adsorption and fast adsorption speed, the method of using 5A molecular sieve to absorb moisture can greatly reduce the water content in the antistatic agent 102.

[0066] In some embodiments of the present invention, after pre-treating the antistatic agent 102 to reduce the water content in the antistatic agent 102 , the filling method further includes: drying the antistatic agent 102 .

[0067] In this embodiment, the antistatic agent 102 is pretreated to reduce the water content in the antistatic agent 102, and then the antistatic agent 102 is dried, and the moisture can be removed again before the antistatic agent 102 enters the dilution container 108, thereby avoiding excessive moisture in the antistatic agent 102 from being injected into the polymerization reactor and causing adverse effects on the reaction activity.

[0068] In some embodiments of the present invention, Figure 4As shown, the filling method also includes: S502, transporting the antistatic agent 102 to the dilution container 108; S504, determining the content of the diluent 104 added to the dilution container 108 according to the content of the antistatic agent 102 in the dilution container 108; S506, in the dilution container 108, the antistatic agent 102 and the diluent 104 are mixed to obtain a mixed solution; S508 , transporting the mixed solution to the polymerization reaction vessel 112 .

[0069] In this embodiment, since the amount of antistatic agent 102 added needs to be precisely controlled during the polymerization reaction, the amount of mixed solution added to the polymerization reaction container 112 must be precise. Therefore, in the process of conveying the diluent 104 to the dilution container 108, the content of the diluent 104 added to the dilution container 108 is determined according to the content of the antistatic agent 102 in the dilution container 108, so that the content of the diluent 104 can be determined, and the amount of the mixed solution added can be determined, thereby achieving the accuracy of the mixed solution filling.

[0070] In some embodiments of the present invention, Figure 5 As shown, the filling method also includes: S602, transporting the antistatic agent 102 to the dilution container 108; S604, weighing the first mass of the antistatic agent 102 delivered to the dilution container 108; S606, determining a second mass of the diluent 104 according to the first mass; S608, in the dilution container 108, the antistatic agent 102 and the diluent 104 are mixed to obtain a mixed solution; S610, transporting the mixed solution to the polymerization reaction container 112.

[0071] In this embodiment, the specific method of determining the content of the diluent 104 added to the dilution container 108 according to the content of the antistatic agent 102 in the dilution container 108 includes: weighing the first mass of the antistatic agent 102 delivered to the dilution container 108, so as to obtain the weight of the antistatic agent 102, and then determining the second mass of the diluent 104 by the weight of the antistatic agent 102, and by adding the second mass of the diluent 104 to the dilution container 108, so as to achieve the purpose of accurately controlling the filling amount of the diluent 104, thereby achieving the accuracy of the dilution concentration of the antistatic agent 102.

[0072] Specifically, the amount of antistatic agent 102 added is measured by using a weighing scale to measure the weight of the antistatic agent 102 added, and the weight of isopentane that needs to be added is determined by the actual amount of antistatic agent 102 added, and then the weight of isopentane is measured and added by a mass flow meter and a flow control valve to achieve the purpose of accurately controlling the amount of pentane added, thereby achieving the accuracy of the dilution concentration of the antistatic agent 102.

[0073] Specifically, the refined isopentane in the polymerization reaction vessel 112 is an inert component for the ethylene polymerization reaction, and the isopentane has been dehydrated, and its purity meets the requirements of the fluidized bed polymerization reactor for raw materials. After being injected into the reactor, it will not cause adverse effects on the polymerization reaction. Therefore, this patent uses isopentane as an organic solvent as a diluent 104 for the antistatic agent 102 to increase the fluidity of the antistatic agent 102 in a low temperature environment.

[0074] In some embodiments of the present invention, the dilution container 108 is provided with a first flow detection device and a first flow regulation device. After determining the second mass of the diluent 104 according to the first mass, it includes: transporting the second mass of the diluent 104 to the dilution container 108 according to the first flow detection device and the first flow regulation device.

[0075] In this embodiment, the dilution container 108 is provided with a first flow detection device and a first flow regulation device. By providing the first flow detection device and the first flow regulation device, the second mass of the diluent 104 can be delivered to the dilution container 108 by adjusting the first flow detection device and the first flow regulation device, thereby improving the accuracy of the filling of the diluent 104, thereby achieving the accuracy of the dilution concentration of the antistatic agent 102.

[0076] In some embodiments of the present invention, the antistatic agent 102 and the diluent 104 are mixed to obtain a mixed solution, which includes: stirring the antistatic agent 102 and the diluent 104 in the dilution container 108 for a preset time.

[0077] In this embodiment, the antistatic agent 102 and the diluent 104 are added to the dilution container 108 respectively, and the antistatic agent 102 and the diluent 104 in the dilution container 108 are stirred for a preset time, so that the antistatic agent 102 and the diluent 104 form a mixed solution to achieve dilution of the antistatic agent 102, and by continuously stirring the mixed solution formed by the antistatic agent 102 and the diluent 104, the mixed solution can be prevented from stratifying and the filling amount can be prevented from being deteriorated. Therefore, by stirring the antistatic agent 102 and the diluent 104 for a preset time, it is possible to ensure that the antistatic agent 102 and the diluent 104 are fully integrated, thereby achieving sufficient dilution of the antistatic agent 102.

[0078] In some embodiments of the present invention, Figure 6 As shown, the filling method also includes: S702, transporting the antistatic agent 102 to the dilution container 108; S704, conveying the diluent 104 into the dilution container 108; S706, in the dilution container 108, the antistatic agent 102 and the diluent 104 are mixed to obtain a mixed solution; S708, using the filling pump 110 to extract the mixed solution in the dilution container 108; adjusting the pressure of the mixed solution; S710 , when the pressure of the mixed solution reaches a first pressure threshold, the filling pump 110 delivers the mixed solution to the polymerization reaction container 112 .

[0079] In this embodiment, the filling pump 110 is used to extract the mixed solution in the dilution container 108, and then the mixed solution in the dilution container 108 can be transported, so that the mixed solution can be added to the polymerization reaction container 112 to adjust the pressure of the mixed solution; when the pressure of the mixed solution reaches the first pressure threshold, the filling pump 110 transports the mixed solution to the polymerization reaction container 112, and the pressure of the mixed solution is adjusted by the filling pump 110, so as to ensure that the mixed solution in the dilution container 108 can enter the polymerization reaction container 112 to achieve the filling of the mixed solution.

[0080] In some embodiments of the present invention, the first pressure threshold is greater than 2200 kPa and less than or equal to 2400 kPa.

[0081] In this embodiment, the pressure of the mixed solution is regulated by setting the first pressure threshold to be greater than 2200 kPa and less than or equal to 2400 kPa, and the first pressure threshold is set to 2200 kPa to 2400 kPa to ensure that the mixed solution in the dilution container 108 can enter the polymerization reaction container 112 to achieve the filling of the mixed solution.

[0082] In some embodiments of the present invention, after the mixed solution is transported to the polymerization reaction container 112, the filling method further includes: detecting a first pressure value at the outlet of the filling pump 110; and closing the outlet of the filling pump 110 when the first pressure value is less than or equal to a second pressure threshold.

[0083] In this embodiment, after the mixed solution is transported to the polymerization reaction container 112, the first pressure value at the outlet of the filling pump 110 is detected. When the first pressure value is less than or equal to the second pressure threshold, that is, the pressure at the outlet of the filling pump 110 is lower than the normal value, the outlet of the filling pump 110 needs to be stopped, and the filling of the mixed solution into the polymerization reaction container 112 is stopped, thereby preventing the medium in the polymerization reaction container 112 from flowing back into the pipeline through which the mixed solution is injected into the polymerization reaction container 112 and causing pipeline blockage.

[0084] Specifically, the filling pump 110 is a metering pump. In order to prevent pressure backflow, a safety interlock is set at the outlet of the metering pump. When the pump outlet pressure is lower than the normal value, the interlock will close the injection valve to prevent the medium in the reactor from backflowing into the pipeline of the mixed solution injected into the polymerization reaction container 112 and causing pipeline blockage.

[0085] In some embodiments of the present invention, after the filling pump 110 delivers the mixed solution to the polymerization reaction container 112, the filling method further includes: detecting the filling speed of the mixed solution entering the polymerization reaction container 112; and determining the injection amount of the mixed solution according to the filling speed.

[0086] In this embodiment, after the filling pump 110 delivers the mixed solution to the polymerization reaction container 112, the filling speed of the mixed solution entering the polymerization reaction container 112 is detected, and the injection amount of the mixed solution is determined according to the filling speed, thereby ensuring the accuracy of the filling amount of the mixed solution containing the antistatic agent 102. By accurately controlling the filling amount of the mixed solution, the purpose of controlling the static electricity in the reactor can be achieved.

[0087] Specifically, a mass flow meter is provided at the outlet of the metering pump, and cascade control is performed through conversion with the ethylene feed amount in the polymerization reaction vessel 112, thereby achieving control of the injection amount of the mixed solution and the flow rate of the raw ethylene, thereby achieving the purpose of controlling the static electricity of the reactor.

[0088] In some embodiments of the present invention, after the mixed solution is transported to the polymerization reaction container 112, the filling method further includes: transporting reaction raw materials to the polymerization reaction container 112, and mixing the reaction raw materials with the mixed solution.

[0089] In this embodiment, after the mixed solution is transported to the polymerization reaction container 112, the reaction raw materials are transported to the polymerization reaction container 112, and the reaction raw materials are mixed with the mixed solution, so that the mixed solution containing the antistatic agent 102 can improve the conductivity in the polymerization system, eliminate the static electricity generated in the polymerization process in time, and reduce the accumulation of static electricity, thereby maintaining the stability of the polymerization process, allowing the polymerization device to operate stably for a long time and produce stable and high-quality resin products.

[0090] In an embodiment of the present invention, the ratio of the amount of the antistatic agent 102 in the mixed solution delivered to the polymerization reaction container 112 to the amount of the reaction raw materials delivered to the polymerization reaction container 112 is greater than or equal to 0.002% and less than or equal to 0.01%. In this embodiment, the ratio of the amount of the antistatic agent 102 in the mixed solution delivered to the polymerization reaction container 112 to the amount of the reaction raw materials delivered to the polymerization reaction container 112 is greater than or equal to 0.002% and less than or equal to 0.01%, thereby achieving control of the amount of the mixed solution added, by setting the ratio of the amount of the antistatic agent 102 in the mixed solution delivered to the polymerization reaction container 112 to the amount of the reaction raw materials delivered to the polymerization reaction container 112 to 0.002% to 0.01%, thereby achieving the purpose of controlling the static electricity of the reactor.

[0091] Specifically, the ratio of the injection amount of the antistatic agent 102 in the mixed solution delivered to the polymerization reaction container 112 to the injection amount of the reaction raw materials delivered to the polymerization reaction container 112 is equal to 0.002%.

[0092] Specifically, the ratio of the injection amount of the antistatic agent 102 in the mixed solution delivered to the polymerization reaction container 112 to the injection amount of the reaction raw materials delivered to the polymerization reaction container 112 is equal to 0.005%.

[0093] Specifically, the ratio of the injection amount of the antistatic agent 102 in the mixed solution delivered to the polymerization reaction container 112 to the injection amount of the reaction raw materials delivered to the polymerization reaction container 112 is equal to 0.01%.

[0094] In some embodiments of the present invention, the temperature of the antistatic agent 102 in the storage container 114 is greater than or equal to 30° C. and less than or equal to 40° C.

[0095] In this embodiment, the temperature of the antistatic agent 102 in the storage container is greater than or equal to 30°C and less than or equal to 40°C to adjust the heating temperature of the antistatic agent 102. By setting the temperature of the antistatic agent 102 in the storage container 114 to 30°C to 40°C, it is possible to prevent difficulties in filling due to excessive viscosity of the antistatic agent 102.

[0096] Specifically, the temperature of the antistatic agent 102 in the storage container is equal to 30°C.

[0097] Specifically, the temperature of the antistatic agent 102 in the storage container is equal to 40°C.

[0098] In some embodiments of the present invention, the heat preservation time of the antistatic agent 102 is greater than or equal to 6 hours and less than or equal to 10 hours.

[0099] In this embodiment, the heat preservation time of the antistatic agent 102 is greater than or equal to 6 hours and less than or equal to 10 hours, so as to adjust the heat preservation or heating time of the antistatic agent 102 before it is added to the dilution container 108. By setting the heat preservation time of the antistatic agent 102 to 6 hours to 10 hours, the fluidity of the antistatic agent 102 during filling can be improved, the viscosity of the antistatic agent 102 can be reduced, and the situation of difficulty in filling due to excessive viscosity of the antistatic agent 102 during filling can be prevented, so as to facilitate the filling of the antistatic agent 102.

[0100] Specifically, the heat preservation time of the antistatic agent 102 is 6 hours, which can improve the fluidity of the antistatic agent 102 during filling and reduce the viscosity of the antistatic agent 102 .

[0101] Specifically, the heat preservation time of the antistatic agent 102 is 8 hours, which can improve the fluidity of the antistatic agent 102 during filling and reduce the viscosity of the antistatic agent 102 .

[0102] Specifically, the heat preservation time of the antistatic agent 102 is 10 hours, which can improve the fluidity of the antistatic agent 102 during filling and reduce the viscosity of the antistatic agent 102 .

[0103] In some embodiments of the present invention, in the mixed solution, the concentration of the antistatic agent 102 is greater than or equal to 10% and less than or equal to 20%.

[0104] In this embodiment, the concentration of the antistatic agent 102 in the mixed solution is greater than or equal to 10% and less than or equal to 20%, so as to adjust the concentration of the antistatic agent 102 in the mixed solution. The concentration is very important for the concentration of the antistatic agent 102 solution. If the concentration is too high, the fluidity of the solution will not be improved enough, affecting the injection. If the concentration is too low, the amount of solution added will be too large, resulting in the accumulation of recombinant components. By setting the concentration of the antistatic agent 102 to 10% to 20%, the fluidity of the antistatic agent 102 after dilution can be increased, avoiding the phenomenon of difficulty in filling during the filling process.

[0105] Specifically, the concentration of the antistatic agent 102 in the mixed solution is equal to 10%, thereby increasing the fluidity of the antistatic agent 102 after dilution.

[0106] Specifically, the concentration of the antistatic agent 102 in the mixed solution is equal to 15%, thereby increasing the fluidity of the antistatic agent 102 after dilution.

[0107] Specifically, the concentration of the antistatic agent 102 in the mixed solution is equal to 20%, thereby increasing the fluidity of the antistatic agent 102 after dilution.

[0108] In some embodiments of the present invention, a stirrer M is used to stir the antistatic agent 102 and the diluent 104 .

[0109] In this embodiment, the antistatic agent 102 and the diluent 104 are stirred by using the stirrer M, so that the antistatic agent 102 and the diluent 104 respectively added to the dilution container 108 can be fully mixed together, so that the mixed solution is stratified, and the antistatic agent 102 and the diluent 104 are stirred by the stirrer M, so that the formation of the mixed solution is more convenient and quick.

[0110] In some embodiments of the present invention, the diluent 104 is isopentane.

[0111] In this embodiment, isopentane is an inert component for the polymerization reaction, therefore, by setting the diluent 104 to be isopentane, the polymerization reaction will not be adversely affected after being injected into the polymerization reaction vessel 112, and isopentane is used as the diluent 104 of the antistatic agent 102, and the dilution concentration is moderate, taking into account the fluidity of the solution and the operation requirements of the polymerization reaction vessel 112. The problem of poor fluidity of the pure antistatic agent 102 is solved, the dispersibility of the antistatic agent 102 can be guaranteed, and the static electricity generated during the operation of the fluidized bed reactor is effectively eliminated.

[0112] In some embodiments of the present invention, a remote liquid level display is provided on the dilution container 108, so that the main operator can arrange the external operator to perform the dilution operation of the antistatic agent 102 according to the liquid level of the dilution container 108, so as to prevent the antistatic agent 102 from being interrupted due to the empty filling of the antistatic agent 102, resulting in the shutdown of the polymerization reactor. In order to ensure the continuous feeding of the antistatic agent 102 in the reactor during the dilution process of the antistatic agent 102, a metering vertical pipe is added to the side of the dilution container 108, and a liquid level gauge is added to the metering vertical pipe to monitor the liquid level change of the metering vertical pipe. Before the dilution operation of the antistatic agent 102 is performed, the antistatic agent 102 solution is filled into the metering vertical pipe to maintain the reactor feeding. A pressure control system is provided at the top of the dilution container 108, which is used for nitrogen pressure maintenance and pressure-lift replacement of the system, so as to prevent the air from entering during the filling process from affecting the polymerization reaction.

[0113] In some embodiments of the present invention, in order to reduce the impact of the low temperature environment on the antistatic agent 102 and prevent problems such as solvent volatilization caused by local overheating, circulating water heating is added between the storage container 114, the dilution container 108 and the polymerization reaction container 112, and a 200 mm thick insulation layer is set to ensure the stable injection of the antistatic agent 102 when the temperature is low in winter, thereby solving the problem of poor fluidity of the antistatic agent 102 caused by insufficient local heating or excessive heating due to electric heating.

[0114] Specifically, in the related art, the barreled pure liquid polymerization stabilizer (antistatic agent 102) is pressurized by a pneumatic barrel pump and then filled into a high-pressure nitrogen-sealed storage tank through a drying bed 106; the high-pressure nitrogen at the top of the high-pressure nitrogen-sealed storage tank is used to pressurize the storage tank to 2700kPa, and the antistatic agent 102 is pressed into a fluidized bed reactor at about 2000kPa. A 1-meter-long vertical pipe is provided at the bottom of the high-pressure nitrogen-sealed storage tank to maintain continuous feeding to the reactor when the antistatic agent 102 is filled in the high-pressure nitrogen-sealed storage tank; a pentane flushing line and a high-pressure nitrogen purge line are added to the injection pipeline of the antistatic agent 102 to flush and purge the injection pipeline to prevent the pipeline from being blocked; in addition, since the antistatic agent 102 has poor fluidity in a low-temperature environment, electric heating is added to the system pipelines and equipment to maintain a control of about 40°C, and an insulation layer is provided to maintain the pipeline temperature. However, the above method has the following problems: 1. Due to the high viscosity of the ionic liquid type polymerization stabilizer, the fluidity is poor in a low temperature environment, resulting in frequent injection instability and difficulty in filling of the antistatic agent 102, resulting in an increase in bulk materials in the reactor, which seriously affects the smooth operation of the reactor. When the temperature drops, the feed flow is unstable, the flow meter is blocked, the wall temperature and static electricity of the fluidized bed reactor fluctuate frequently, the bulk materials in the reactor suddenly increase, and the discharge line is frequently blocked. In this application, the antistatic agent 102 is mixed with the diluent 104 for filling, and then the antistatic agent 102 can be diluted, so that the diluted antistatic agent 102 can increase the fluidity, thereby reducing the generation of bulk materials and avoiding the blockage of the discharge line. 2. When the ambient temperature is low, when filling the high-pressure nitrogen-sealed storage tank, the antistatic agent 102 has poor fluidity in a low temperature environment, causing the pneumatic pump to fail to increase the amount and filling to be difficult. In this application, the antistatic agent 102 is diluted, which can improve the fluidity of the antistatic agent 102. 3. Although the pipelines and equipment of the system use electric heating and are equipped with insulation layers, the inaccurate measurement of the temperature sensor and incomplete heating cause the temperature of the local pipeline to be low or high, resulting in an increase in the viscosity of the antistatic agent 102, which affects the injection. In the present application, the antistatic agent 102 is diluted, which can improve the fluidity of the antistatic agent 102, reduce the viscosity of the antistatic agent, and facilitate the injection of the antistatic agent 102. 4. Due to the excessive viscosity of the antistatic agent 102, the on-site magnetic flap liquid level gauge displays inaccurately. When the antistatic agent 102 is added to the high-pressure nitrogen-sealed storage tank, the actual liquid level of the vertical pipe cannot be accurately displayed, and there is a risk of the vertical pipe running out of liquid. The present application sets a remote liquid level display and adds a liquid level gauge to monitor the liquid level changes of the metering vertical pipe to prevent the antistatic agent 102 from being interrupted due to the antistatic agent 102 being filled out.

[0115] like Figure 7 and Figure 8 As shown, Figure 7 and Figure 8This is a flow diagram of the antistatic agent dilution system in the present application. After the antistatic agent 102 is dried by the drying bed 106, it enters the dilution container 108, and then the diluent 104 is added to the dilution container 108, and the antistatic agent 102 and the diluent 104 are mixed to form a mixed solution, which is then added to the polymerization reaction container 112 through the filling pump 110. During the process of injecting the diluent 104 into the dilution container 108, the filling of the diluent is controlled by the first flow detection device and the first flow regulating device, the first flow detection device is a flow valve FV, and the first flow regulating device is a first flow regulating valve FE1; the storage container 114 is a warm room, so that the warm room can keep the antistatic agent 102 warm. In the process of refining the antistatic agent 102, the antistatic agent 102 is transported to the refining tank 118 through the first pipeline 116 for refining, and the refined antistatic agent 102 can be transported to the dilution container 108. The first pipeline 116 can be heated by circulating water to keep the antistatic agent 102 in the first pipeline 116 warm, thereby enhancing the fluidity of the antistatic agent 102. The antistatic agent 102 and the diluent 104 transported to the dilution container 108 can be stirred by the stirrer M provided in the dilution container 108, so that the antistatic agent 102 and the diluent 104 are fully mixed into a mixed solution. A pressure control system is provided at the top of the dilution container 108, and nitrogen N2 can be input into the dilution container 108 for pressure maintenance. A first pressure regulating valve PV1 is provided on the nitrogen N2 transport pipeline, and the pressure control system also includes a pressure regulator FL and a second pressure regulating valve PV2 to facilitate pressure regulation. A buffer container 120 is added to the side of the dilution container 108, and a first liquid level display component LE1 is provided on the buffer container 120 to facilitate observation of changes in the liquid level in the buffer container 120. The buffer container 120 is provided to ensure the stability of the mixed solution filling operation. A second liquid level display component LE2 is also provided on the dilution container 108 to facilitate observation of changes in the liquid level in the dilution container 108.

[0116] The dilution container 108 delivers the mixed solution to the filling pump 110, and the filling pump 110 delivers the mixed solution to the polymerization reaction container 112 through the pipeline, so that the antistatic agent 102 can remove the static electricity generated during the polymerization reaction. A second flow control valve FE2 and a pneumatic isolation valve 122 are provided on the pipeline between the filling pump 110 and the polymerization reaction container 112 to control the delivery of the mixed solution to the polymerization reaction container 112.

[0117] Although this specification includes many specific implementation details, these should not be interpreted as limiting the scope of any invention or the scope of protection claimed, but are mainly used to describe the features of the specific embodiments of specific inventions. Certain features described in multiple embodiments in this specification may also be implemented in combination in a single embodiment. On the other hand, the various features described in a single embodiment may also be implemented separately in multiple embodiments or in any suitable sub-combination. In addition, although features may work in certain combinations as described above and even initially claim protection, one or more features from the claimed combination may be removed from the combination in some cases, and the claimed combination may point to a sub-combination or a variation of a sub-combination.

[0118] Similarly, although operations are depicted in a particular order in the accompanying drawings, this should not be understood as requiring that these operations be performed in the particular order shown or performed sequentially, or requiring that all illustrated operations be performed to achieve the desired results. In some cases, multitasking and parallel processing may be advantageous. In addition, the separation of various system modules and components in the above-described embodiments should not be understood as requiring such separation in all embodiments, and it should be understood that the described program components and systems can generally be integrated together in a single software product, or packaged into multiple software products.

[0119] Thus, specific embodiments of the subject matter have been described. Other embodiments are within the scope of the appended claims. In some cases, the actions recited in the claims can be performed in a different order and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the particular order or sequential order shown to achieve the desired results. In some implementations, multitasking and parallel processing may be advantageous.

[0120] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0121] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for adding a polymerization stabilizer, characterized in that: include: delivering the antistatic agent to a dilution container; delivering a diluent into the dilution container; In the dilution container, the antistatic agent and the diluent are mixed to obtain a mixed solution; conveying the mixed solution into a polymerization reaction vessel; The delivering the diluent into the dilution container includes: determining the content of the diluent added into the dilution container according to the content of the antistatic agent in the dilution container.

2. The filling method according to claim 1, characterized in that: Before delivering the antistatic agent into the dilution container, the filling method further comprises: placing the antistatic agent in a storage container; The antistatic agent is subjected to heat preservation treatment in the storage container.

3. The filling method according to claim 2, characterized in that: Before delivering the antistatic agent into the dilution container, the filling method further comprises: The antistatic agent is pretreated to reduce the water content in the antistatic agent.

4. The filling method according to claim 3, characterized in that: Pre-treating the antistatic agent to reduce the water content in the antistatic agent comprises: 5A molecular sieve is used to absorb the moisture in the antistatic agent.

5. The filling method according to claim 3, characterized in that: After pre-treating the antistatic agent to reduce the water content in the antistatic agent, the filling method further comprises: The antistatic agent is dried.

6. The filling method according to claim 1, characterized in that: Determining the content of the diluent added to the dilution container according to the content of the antistatic agent in the dilution container comprises: weighing a first mass of the antistatic agent delivered to the dilution container; A second mass of the diluent is determined based on the first mass.

7. The filling method according to claim 6, characterized in that: The dilution container is provided with a first flow detection device and a first flow regulation device. After determining the second mass of the diluent according to the first mass, the filling method comprises: The second mass of the diluent is delivered to the dilution container according to the first flow detection device and the first flow regulation device.

8. The filling method according to claim 1, characterized in that: The antistatic agent is mixed with the diluent to obtain a mixed solution, comprising: The antistatic agent and the diluent in the dilution container are stirred for a preset time.

9. The filling method according to claim 1, characterized in that: The mixed solution is transported to a polymerization reaction vessel, comprising: Using a filling pump to extract the mixed solution in the dilution container; adjusting the pressure of the mixed solution; When the pressure of the mixed solution reaches a first pressure threshold, the filling pump delivers the mixed solution to a polymerization reaction container.

10. The filling method according to claim 9, characterized in that: The first pressure threshold is greater than 2200 kPa and less than or equal to 2400 kPa.

11. The filling method according to claim 9, characterized in that: After the mixed solution is transported to the polymerization reaction container, the filling method further comprises: Detecting a first pressure value at an outlet of the filling pump; When the first pressure value is less than or equal to a second pressure threshold, the outlet of the filling pump is closed.

12. The filling method according to claim 9, characterized in that: After the filling pump delivers the mixed solution to the polymerization reaction container, the filling method further comprises: Detecting the filling speed of the mixed solution into the polymerization reaction container; The injection amount of the mixed solution is determined according to the injection speed.

13. The filling method according to claim 12, characterized in that: After the filling pump delivers the mixed solution to the polymerization reaction container, the filling method further comprises: The reaction raw materials are transported to a polymerization reaction vessel, and the reaction raw materials are mixed with the mixed solution.

14. The filling method according to claim 13, characterized in that: The ratio of the amount of the antistatic agent in the mixed solution delivered to the polymerization reaction container to the amount of the reaction raw materials delivered to the polymerization reaction container is greater than or equal to 0.002% and less than or equal to 0.01%.

15. The filling method according to claim 2, characterized in that: The temperature of the antistatic agent in the storage container is greater than or equal to 30° C. and less than or equal to 40° C.

16. The filling method according to claim 2, characterized in that: The heat preservation time of the antistatic agent is greater than or equal to 6 hours and less than or equal to 10 hours.

17. The filling method according to claim 1, characterized in that: In the mixed solution, the concentration of the antistatic agent is greater than or equal to 10% and less than or equal to 20%.

18. The filling method according to claim 1, characterized in that: The antistatic agent and the diluent are stirred by a stirrer.

19. The filling method according to claim 1, characterized in that: The diluent is isopentane.

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