CN119303503A - Polymerization reaction stabilizer filling method - Google Patents
Polymerization reaction stabilizer filling method Download PDFInfo
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- CN119303503A CN119303503A CN202411846921.XA CN202411846921A CN119303503A CN 119303503 A CN119303503 A CN 119303503A CN 202411846921 A CN202411846921 A CN 202411846921A CN 119303503 A CN119303503 A CN 119303503A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/02—Feed or outlet devices; Feed or outlet control devices for feeding measured, i.e. prescribed quantities of reagents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/405—Methods of mixing liquids with liquids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/43—Mixing liquids with liquids; Emulsifying using driven stirrers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/211—Measuring of the operational parameters
- B01F35/2111—Flow rate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/211—Measuring of the operational parameters
- B01F35/2117—Weight
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/83—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices
- B01F35/832—Flow control by weighing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/008—Feed or outlet control devices
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/02—Ethene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/2204—Mixing chemical components in generals in order to improve chemical treatment or reactions, independently from the specific application
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- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
Abstract
本发明涉及一种聚合反应稳定剂的加注方法，包括：将抗静电剂输送到稀释容器中；将稀释剂输送到稀释容器中；在稀释容器中，将抗静电剂与稀释剂混合，获得混合溶液；将混合溶液输送至聚合反应容器中。
The invention relates to a method for filling a polymerization stabilizer, comprising: conveying an antistatic agent into a dilution container; conveying a diluent into the 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.
Description
Technical Field
The invention relates to the technical field of liquid filling, in particular to a filling method of a polymerization stabilizer.
Background
Currently, in the related art, a polyethylene plant fluidized bed reactor generates a large amount of static electricity enrichment during operation. Antistatic agents are generally added into a polymerization reactor to improve the conductivity of the polymerization system, so that static electricity generated in the polymerization process is eliminated in time, and enrichment of the static electricity is reduced, but the antistatic agents have poor fluidity in a low-temperature environment, and the antistatic agents cannot be stably added into the polymerization reactor due to the fact that the antistatic agents are directly added into the polymerization reactor.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art or related art.
In view of this, a first aspect of the present invention proposes a method of filling a polymerization stabilizer.
Specifically, the invention is realized by the following technical scheme:
according to a first aspect of the present invention, there is provided a method of charging a polymerization stabilizer comprising feeding an antistatic agent into a diluting container, feeding a diluent into the diluting container, mixing the antistatic agent with the diluent in the diluting container to obtain a mixed solution, and feeding the mixed solution into a polymerization container.
In this embodiment, the method for charging the polymerization stabilizer includes feeding an antistatic agent into a dilution vessel, feeding a diluent into the dilution vessel, thereby achieving feeding of both the antistatic agent and the diluent into the dilution vessel, mixing the antistatic agent and the diluent together in the dilution vessel, thereby obtaining a mixed solution after mixing, and feeding the mixed solution into the polymerization vessel, thereby enabling the mixed solution to eliminate static electricity generated in the polymerization vessel during polymerization, reducing enrichment of static electricity, thereby maintaining stability of the polymerization process, enabling a polymerization apparatus to be stably operated for a long time, and producing a stable and high-quality product. According to the application, the antistatic agent and the diluent are mixed together for filling, so that the antistatic agent can be diluted, the fluidity of the diluted antistatic agent can be increased, the technical problem that the antistatic agent has poor fluidity in a low-temperature environment and is difficult to fill can be solved, the dispersibility of the antistatic agent can be ensured, and the static electricity generated in the running process of a polymerization reaction container can be effectively eliminated.
In addition, the filling method in the above embodiment provided by the present invention may further have the following additional technical features:
In some embodiments of the invention, the method of filling further comprises placing the antistatic agent in a storage container, and incubating the antistatic agent in the storage container, prior to delivering the antistatic agent to the dilution container.
In this embodiment, before the antistatic agent is transferred into the dilution vessel, the antistatic agent is placed in the storage vessel to achieve storage of the antistatic agent, so that the storage vessel can store the antistatic agent, and the temperature of the antistatic agent is prevented from being lowered due to direct exposure of the antistatic agent to an external space, thereby preventing the temperature of the antistatic agent from being too low to lower the fluidity of the antistatic agent. The heat-insulating treatment is performed on the antistatic agent in the storage container before the antistatic agent is filled in the dilution container, so that the situation that the filling difficulty is caused by the excessive viscosity of the antistatic agent when the antistatic agent is filled in the dilution container can be prevented, and therefore, the fluidity of the antistatic agent during filling can be increased and the filling efficiency of the antistatic agent can be improved by placing the antistatic agent in the storage container and performing the heat-insulating treatment.
In some embodiments of the invention, the method of filling further comprises pre-treating the antistatic agent to reduce the water content of the antistatic agent prior to delivering the antistatic agent to the dilution vessel.
In this embodiment, since the antistatic agent absorbs moisture in the air during transportation, the excessive moisture of the antistatic agent may affect the polymerization reaction, and thus, the antistatic agent is pretreated before being transported into the dilution vessel, and the water content in the antistatic agent is reduced by the pretreatment, so that the mixed solution formed by the antistatic agent is prevented from entering the polymerization reaction vessel to affect the polymerization reaction, thereby ensuring that the antistatic agent can remove static electricity in the polymerization reaction vessel without affecting the polymerization reaction.
In some embodiments of the invention, pre-treating the antistatic agent to reduce the water content in the antistatic agent includes adsorbing the moisture in the antistatic agent with a 5A molecular sieve.
In the embodiment, the water content in the antistatic agent is reduced by preprocessing the antistatic agent in a specific mode that the 5A molecular sieve is used for adsorbing the water in the antistatic agent, and the 5A molecular sieve has the characteristics of high adsorptivity and high adsorption speed, so that the water content in the antistatic agent can be greatly reduced by adopting the mode that the 5A molecular sieve is used for absorbing the water.
In some embodiments of the invention, the method of priming further comprises drying the antistatic agent after the antistatic agent is pre-treated to reduce the water content in the antistatic agent.
In this example, the antistatic agent was pretreated, the antistatic agent was dried after the water content in the antistatic agent was reduced, and then the moisture could be removed again before the antistatic agent entered the dilution vessel, so that adverse effect on the reactivity after the excessive moisture in the antistatic agent was injected into the polymerization vessel could be avoided.
In some embodiments of the invention, delivering the diluent into the dilution vessel includes determining the amount of diluent added to the dilution vessel based on the amount of antistatic agent in the dilution vessel.
In this embodiment, since the addition amount of the antistatic agent needs to be precisely controlled during the polymerization reaction, the addition amount of the mixed solution to be charged into the polymerization reaction vessel must be precise, and therefore, the content of the diluent to be charged into the dilution vessel is determined according to the content of the antistatic agent in the dilution vessel during the transfer of the diluent into the dilution vessel, so that the content of the diluent can be determined, whereby the addition amount of the mixed solution can be determined, and thus the accuracy of the addition of the mixed solution can be achieved.
In some embodiments of the invention, determining the amount of diluent added to the dilution vessel based on the amount of antistatic agent in the dilution vessel includes weighing a first mass of antistatic agent delivered to the dilution vessel and determining a second mass of diluent based on the first mass.
In this embodiment, the specific manner of determining the content of the diluent added to the diluting container according to the content of the antistatic agent in the diluting container includes weighing a first mass of the antistatic agent fed to the diluting container, so that the weight of the antistatic agent can be obtained, and thus a second mass of the diluent can be determined by the weight of the antistatic agent, and the purpose of precisely controlling the diluent addition amount can be achieved by adding the second mass of the diluent to the diluting container, thereby achieving the accuracy of the dilution concentration of the antistatic agent.
In some embodiments of the invention the dilution vessel is provided with a first flow detection means and a first flow adjustment means, after determining a second mass of diluent from the first mass, comprising delivering the second mass of diluent into the dilution vessel in accordance with the first flow detection means and the first flow adjustment means.
In this embodiment, the dilution vessel is provided with the first flow rate detecting means and the first flow rate adjusting means, and by providing the first flow rate detecting means and the first flow rate adjusting means, the second mass of the diluent can be further conveyed into the dilution vessel by adjusting the first flow rate detecting means and the first flow rate adjusting means, so that the accuracy of the filling of the diluent can be improved, and the accuracy of the diluted concentration of the antistatic agent can be realized.
In some embodiments of the invention, mixing the antistatic agent with the diluent to obtain a mixed solution includes stirring the antistatic agent and the diluent in a dilution vessel for a preset time.
In this embodiment, the mixed solution is diluted by adding the antistatic agent and the diluent to the dilution vessel separately and stirring the antistatic agent and the diluent in the dilution vessel for a preset time, so that the mixed solution is formed by the antistatic agent and the diluent, and the mixed solution is prevented from being layered by continuously stirring the mixed solution formed by the antistatic agent and the diluent, and the filling amount is deteriorated, so that by stirring the antistatic agent and the diluent for the preset time, sufficient fusion of the antistatic agent and the diluent can be ensured, and thus sufficient dilution of the antistatic agent can be achieved.
In some embodiments of the invention, delivering the mixed solution to the polymerization vessel includes withdrawing the mixed solution in the dilution vessel with a fill pump, adjusting the pressure of the mixed solution, and delivering the mixed solution to the polymerization vessel with the fill pump if the pressure of the mixed solution reaches a first pressure threshold.
In the embodiment, the mixed solution in the dilution vessel is pumped by the filling pump, so that the mixed solution in the dilution vessel can be conveyed, the mixed solution can be filled into the polymerization vessel, the pressure of the mixed solution is regulated, and when the pressure of the mixed solution reaches a first pressure threshold value, the mixed solution is conveyed into the polymerization vessel by the filling pump, and the pressure of the mixed solution is regulated by the filling pump, so that the mixed solution in the dilution vessel can be ensured to enter the polymerization vessel, and the filling of the mixed solution is realized.
In some embodiments of the invention, the first pressure threshold is greater than 2200kPa and less than or equal to 2400kPa.
In this embodiment, the adjustment of the pressure of the mixed solution is achieved by setting the first pressure threshold to be greater than 2200kPa and less than or equal to 2400kPa, and the filling of the mixed solution is achieved by setting the first pressure threshold to be 2200kPa to 2400kPa to ensure that the mixed solution in the dilution vessel can enter the polymerization vessel.
In some embodiments of the invention, the method of priming further comprises detecting a first pressure value at the outlet of the priming pump after the mixed solution is delivered to the polymerization vessel, and closing the outlet of the priming pump if the first pressure value is less than or equal to a second pressure threshold value.
In this embodiment, after the mixed solution is fed into the polymerization reaction vessel, the first pressure value detection at the outlet of the filling pump is performed, and in the case where the first pressure value is equal to or less than the second pressure threshold value, that is, when the pressure at the outlet of the filling pump is lower than the normal value, the outlet of the filling pump is required to stop the filling of the mixed solution into the polymerization reaction vessel, so that the back channeling of the medium in the polymerization reaction vessel into the line where the mixed solution is injected into the polymerization reaction vessel can be prevented from causing the line blockage.
In some embodiments of the present invention, the method of filling further comprises detecting a fill rate of the mixed solution into the polymerization vessel after the filling pump delivers the mixed solution into the polymerization vessel, and determining an injection amount of the mixed solution based on the fill rate.
In this embodiment, after the filling pump conveys the mixed solution into the polymerization reaction vessel, the filling speed of the mixed solution into the polymerization reaction vessel is detected, and the filling amount of the mixed solution is determined according to the filling speed, so that the accuracy of the filling amount of the mixed solution containing the antistatic agent can be ensured, and the purpose of controlling the static electricity of the reactor can be achieved by precisely controlling the filling amount of the mixed solution.
In some embodiments of the present invention, the method of filling further comprises, after delivering the mixed solution to the polymerization vessel, delivering the reaction feed to the polymerization vessel, and mixing the reaction feed with the mixed solution.
In this embodiment, after the mixed solution is transferred to the polymerization reaction vessel, the reaction raw material is transferred to the polymerization reaction vessel, and the reaction raw material is mixed with the mixed solution, so that the mixed solution containing the antistatic agent can improve the conductivity in the polymerization system, timely eliminate static electricity generated in the polymerization process, and reduce the enrichment of static electricity, thereby maintaining the stability of the polymerization process, enabling the polymerization apparatus to operate stably for a long time, and producing a stable high-quality resin product.
In some embodiments of the present invention, the ratio of the injection amount of the antistatic agent in the mixed solution to the injection amount of the reaction raw material into the polymerization reaction vessel is 0.002% or more and 0.01% or less.
In this embodiment, the ratio of the injection amount of the antistatic agent in the mixed solution to the injection amount of the reaction raw material in the polymerization reaction vessel is 0.002% or more and 0.01% or less, thereby realizing the control of the injection amount of the mixed solution.
In some embodiments of the invention, the temperature of the antistatic agent in the storage container is greater than or equal to 30 ℃ and less than or equal to 40 ℃.
In this embodiment, the temperature of the antistatic agent in the storage container is 30 ℃ or more and 40 ℃ or less to achieve adjustment of the heating temperature of the antistatic agent, and by setting the temperature of the antistatic agent in the storage container to 30 ℃ to 40 ℃, it is possible to prevent the difficult filling due to excessive viscosity of the antistatic agent at the time of filling.
In some embodiments of the invention, the incubation time of the antistatic agent is greater than or equal to 6 hours and less than or equal to 10 hours.
In this example, the incubation time of the antistatic agent was 6 hours or more and 10 hours or less to achieve adjustment of the incubation or warming time of the antistatic agent before filling into the dilution vessel. By setting the heat preservation time of the antistatic agent to be 6 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 situation that filling is difficult due to overlarge viscosity of the antistatic agent during filling can be prevented, so that the antistatic agent can be conveniently filled.
In some embodiments of the invention, the concentration of antistatic agent in the mixed solution is 10% or more and 20% or less.
In this example, the concentration of the antistatic agent in the mixed solution was 10% or more and 20% or less to achieve the adjustment of the concentration of the antistatic agent in the mixed solution. The concentration is very important for the concentration of the antistatic agent solution, and too high concentration can lead to insufficient improvement of the fluidity of the solution, influence injection, and too low concentration can lead to accumulation of heavy components due to too large addition amount of the solution. By setting the concentration of the antistatic agent to 10-20%, the fluidity of the antistatic agent after dilution can be further increased, and the phenomenon of difficult filling in the filling process can be avoided.
In some embodiments of the invention, the antistatic agent and the diluent are stirred using a stirrer.
In this embodiment, through utilizing the agitator to stir antistatic agent and diluent, and then can be with the antistatic agent and the diluent that fill respectively in diluting container fully mix together to the layering phenomenon appears in the solution after mixing, and, adopt the mode of agitator to stir antistatic agent and diluent, and then make the formation of mixed solution more convenient, swift.
In some embodiments of the invention, the diluent is isopentane.
In this example, isopentane is an inert component for the polymerization reaction, so that by setting the diluent to isopentane, the polymerization reaction is not adversely affected after injection into the polymerization reaction vessel, isopentane is used as the diluent for the antistatic agent, the dilution concentration is moderate, and the solution fluidity and the running requirement of the polymerization reaction vessel are both considered. Solves the problem of poor fluidity of the pure antistatic agent, can ensure the dispersibility of the antistatic agent and effectively eliminates the static electricity generated in the operation process of the fluidized bed reactor.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
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.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the related art will be briefly described below, and it will be apparent to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 illustrates one of the flow charts of a filling method according to one embodiment of the invention;
FIG. 2 shows a second flow chart of a method of filling according to one embodiment of the invention;
FIG. 3 shows a third flow chart of a method of filling according to one embodiment of the invention;
FIG. 4 shows a fourth flow chart of a method of filling according to one embodiment of the invention;
FIG. 5 shows a fifth flow chart of a method of filling according to one embodiment of the invention;
FIG. 6 shows a sixth flowchart of a method of filling according to one embodiment of the invention;
FIG. 7 shows a schematic flow diagram of an antistatic agent dilution system according to one embodiment of the invention;
FIG. 8 shows a schematic flow diagram of an antistatic agent dilution system according to one embodiment of the invention.
Wherein, the correspondence between the reference numerals and the component names in fig. 7 and 8 is:
102 antistatic agent, 104 diluent, 106 dry bed, 108 dilution vessel, 110 fill pump, 112 polymerization vessel, 114 storage vessel, 116 first line, 118 refining tank, 120 buffer vessel, 122 pneumatic isolation valve, M stirrer, LE1 first liquid level display part, LE2 second liquid level display part, 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
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Methods of filling polymerization stabilizers according to some embodiments of the present invention are described below with reference to fig. 1 to 8.
A first aspect of the present invention provides a method of filling a polymerization stabilizer, as shown in fig. 1, the method comprising:
S202, conveying the antistatic agent 102 into the dilution vessel 108;
s204, conveying the diluent 104 into the dilution vessel 108;
S206, mixing the antistatic agent 102 with the diluent 104 in the dilution vessel 108 to obtain a mixed solution;
s208, the mixed solution is transferred to the polymerization vessel 112.
In this embodiment, the method of adding the polymerization stabilizer comprises transferring the antistatic agent 102 into the dilution vessel 108, transferring the diluent 104 into the dilution vessel 108, thereby transferring both the antistatic agent 102 and the diluent 104 into the dilution vessel 108, mixing the antistatic agent 102 and the diluent 104 together in the dilution vessel 108, thereby obtaining a mixed solution, transferring the mixed solution into the polymerization vessel 112, thereby eliminating static electricity generated in the polymerization vessel 112 during polymerization, reducing enrichment of static electricity, thereby maintaining stability of the polymerization process, enabling the polymerization apparatus to operate stably for a long time, and producing a stable and high quality product. According to the application, the antistatic agent 102 and the diluent 104 are mixed together for filling, so that the antistatic agent 102 can be diluted, the fluidity of the diluted antistatic agent 102 can be increased, the technical problem that the antistatic agent 102 has poor fluidity in a low-temperature environment and is difficult to fill can be solved, the dispersibility of the antistatic agent 102 can be ensured by the diluted antistatic agent 102, and the static electricity generated in the running process of the polymerization reaction vessel 112 can be effectively eliminated.
Specifically, the diluent 104 is isopentane.
Specifically, the antistatic agent 102 is an ionic liquid type polymerization stabilizer.
In particular, polyethylene plant fluidized bed reactors produce a significant amount of static enrichment during operation. If the static fluctuation is large, the polyethylene fine powder and the catalyst particles in the reactor are easily adsorbed on the wall of the reactor to form a non-fluidized layer. The catalyst-containing fines continue to react here, and the heat of polymerization cannot be dissipated because of the loss of fluidization, which causes the non-fluidized bed to melt and form flakes, which grow to a certain thickness and fall onto the distribution plate, which tends to clog the distribution plate, thereby affecting the fluidization of the reaction bed and plugging the reactor distribution plate or discharge system. Long periods of high static electricity fluctuations deteriorate the fluidization conditions and the reactor is even forced to be shut down for manual cleaning. At present, the polymerization process is generally to fill an ionic liquid polymerization stabilizer in a polymerization reaction vessel 112 to improve the conductivity in a polymerization system, so that static electricity generated in the polymerization process is eliminated in time, and enrichment of the static electricity is reduced, thereby maintaining the stability of the polymerization process, enabling a polymerization device to run stably for a long time, and producing a stable high-quality resin product. The ionic liquid polymerization stabilizer comprises organic ammonium salt, castor oil, long-chain alkyl benzene sulfonic acid, n-heptane, cyclohexane, petroleum ether and the like. Because the viscosity of the ionic liquid type polymerization stabilizer is relatively large, the fluidity of the ionic liquid type polymerization stabilizer in a low-temperature environment is very poor, so that the filling continuity of the ionic liquid type polymerization stabilizer is poor in winter, and the reactor is blocked and even is forced to stop. According to the application, the antistatic agent 102 and the diluent 104 are mixed together for filling, so that the antistatic agent 102 can be diluted, the fluidity of the diluted antistatic agent 102 can be increased, and the problems of poor fluidity and unstable injection of the ionic liquid polymerization stabilizer in a low-temperature environment are solved.
In addition, the filling method in the above embodiment provided by the present invention may further have the following additional technical features:
in some embodiments of the present invention, as shown in fig. 2, the filling method further includes:
s302, placing the antistatic agent 102 in the storage container 114;
S304, carrying out heat preservation treatment on the antistatic agent 102 in the storage container 114;
S306, conveying the antistatic agent 102 into the dilution vessel 108;
S308, delivering the diluent 104 into the dilution vessel 108;
s310, mixing the antistatic agent 102 with the diluent 104 in the dilution vessel 108 to obtain a mixed solution;
s312, the mixed solution is fed into the polymerization vessel 112.
In this embodiment, before the antistatic agent 102 is transferred into the dilution vessel 108, the antistatic agent 102 is placed in the storage vessel 114 to enable storage of the antistatic agent 102, so that the storage vessel 114 can store the antistatic agent 102, and the temperature of the antistatic agent 102 is prevented from being lowered due to direct exposure of the antistatic agent 102 to an external space, thereby preventing the temperature of the antistatic agent 102 from being too low to lower the fluidity of the antistatic agent 102. The heat-insulating treatment of the antistatic agent 102 in the storage container 114 before the antistatic agent 102 is filled into the dilution container 108 can prevent the difficult filling of the antistatic agent 102 due to excessive viscosity of the antistatic agent 102 when the antistatic agent 102 is filled into the dilution container 108, and therefore, by placing the antistatic agent 102 in the storage container 114 and performing the heat-insulating treatment, the fluidity of the antistatic agent 102 at the time of filling can be increased, and the filling efficiency of the antistatic agent 102 can be improved.
Specifically, the storage container 114 is a thermal insulation greenhouse, and the temperature in the greenhouse is maintained at 30 ℃ to 40 ℃ using the heat tracing water. Before the antistatic agent 102 is filled, the barrel for storing the antistatic agent 102 is placed in a heat-insulating greenhouse to heat, so that the situation that the filling is difficult due to the fact that the viscosity of the antistatic agent 102 is too high during filling is prevented, the antistatic agent 102 is ensured to be smoothly filled into the diluting container 108 from the packaging iron barrel, and the accuracy of the dilution concentration of the antistatic agent 102 is further ensured.
In some embodiments of the present invention, as shown in fig. 3, the filling method further comprises:
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, preprocessing the antistatic agent 102 to reduce the water content in the antistatic agent 102;
S408, conveying the antistatic agent 102 into the dilution vessel 108;
s410, conveying the diluent 104 into the dilution vessel 108;
s412, mixing the antistatic agent 102 with the diluent 104 in the dilution vessel 108 to obtain a mixed solution;
S414, the mixed solution is transferred to the polymerization vessel 112.
In this embodiment, since the antistatic agent 102 absorbs moisture in the air during transportation, the antistatic agent 102 with excessive moisture may affect the polymerization reaction, and thus, the antistatic agent 102 is pretreated before the antistatic agent 102 is transported into the dilution vessel 108, and the water content in the antistatic agent 102 is reduced by the pretreatment, so that the mixed solution formed by the antistatic agent 102 is prevented from entering the polymerization reaction vessel 112 to affect the polymerization reaction, thereby ensuring that the antistatic agent 102 can remove static electricity in the polymerization reaction vessel 112 without affecting the polymerization reaction.
Specifically, the pretreatment includes a refining treatment, so that the water content in the antistatic agent 102 can be reduced.
Specifically, since the antistatic agent 102 contains alkylbenzenesulfonic acid, which is a very water-absorbing substance, in order to prevent the antistatic agent 102 from absorbing moisture in the air during transportation and storage, the reactivity is adversely affected after injection into the polymerization vessel 112, and thus the antistatic agent 102 is refined to reduce the water content therein before the antistatic agent 102 is injected into the diluting buffer tank of the antistatic agent 102, ensuring that the water content of the system satisfies the requirements of the polymerization vessel 112.
In some embodiments of the invention, pre-treating the antistatic agent 102 to reduce the water content in the antistatic agent 102 includes adsorbing the moisture in the antistatic agent 102 with a 5A molecular sieve.
In this embodiment, the water content in the antistatic agent 102 can be greatly reduced by pretreating the antistatic agent 102 to reduce the water content in the antistatic agent 102 in such a way that the 5A molecular sieve is used for adsorbing the water in the antistatic agent 102, and the 5A molecular sieve has the characteristics of high adsorptivity and high adsorption speed.
In some embodiments of the invention, after pre-treating the antistatic agent 102 to reduce the water content in the antistatic agent 102, the method of priming further comprises drying the antistatic agent 102.
In this embodiment, the antistatic agent 102 is pretreated, the antistatic agent 102 is dried after the water content in the antistatic agent 102 is reduced, and then the moisture can be removed again before the antistatic agent 102 enters the dilution vessel 108, so that adverse effects on the reactivity after the excessive moisture in the antistatic agent 102 is injected into the polymerization reactor can be avoided.
In some embodiments of the present invention, as shown in fig. 4, the filling method further comprises:
s502, conveying the antistatic agent 102 into the dilution vessel 108;
s504, determining the content of the diluent 104 added into the dilution vessel 108 according to the content of the antistatic agent 102 in the dilution vessel 108;
S506, mixing the antistatic agent 102 with the diluent 104 in the dilution vessel 108 to obtain a mixed solution;
S508, the mixed solution is transferred to the polymerization vessel 112.
In this embodiment, since the addition amount of the antistatic agent 102 needs to be precisely controlled during the polymerization reaction, the addition amount of the mixed solution to be charged into the polymerization reaction vessel 112 must be precisely controlled, and thus the content of the diluent 104 to be charged into the dilution vessel 108 is determined according to the content of the antistatic agent 102 in the dilution vessel 108 during the transfer of the diluent 104 into the dilution vessel 108, so that the content of the diluent 104 can be determined, whereby the addition amount of the mixed solution can be determined, and thus the accuracy of the addition of the mixed solution can be achieved.
In some embodiments of the present invention, as shown in fig. 5, the filling method further comprises:
S602, conveying the antistatic agent 102 into the dilution vessel 108;
s604, weighing a first mass of the antistatic agent 102 conveyed into the dilution vessel 108;
S606, determining a second mass of the diluent 104 according to the first mass;
S608, mixing the antistatic agent 102 with the diluent 104 in the dilution vessel 108 to obtain a mixed solution;
s610, the mixed solution is transferred to the polymerization vessel 112.
In this embodiment, the specific manner of determining the amount of the diluent 104 added to the dilution vessel 108 based on the amount of the antistatic agent 102 in the dilution vessel 108 includes weighing a first mass of the antistatic agent 102 delivered to the dilution vessel 108, such that a weight of the antistatic agent 102 may be obtained, a second mass of the diluent 104 may be determined by the weight of the antistatic agent 102, and an accuracy of the dilution concentration of the antistatic agent 102 may be achieved by accurately controlling the amount of the diluent 104 added by injecting the second mass of the diluent 104 into the dilution vessel 108.
Specifically, the adding amount of the antistatic agent 102 is measured by using a measuring scale to measure the adding weight of the antistatic agent 102, the weight of isopentane required to be added is determined by the actual adding amount of the antistatic agent 102, and then the weight of isopentane is measured and injected by a mass flowmeter and a flow regulating valve, so that the aim of accurately controlling the pentane adding amount is fulfilled, and the accuracy of the dilution concentration of the antistatic agent 102 is realized.
Specifically, isopentane refined in the polymerization vessel 112 belongs to an inert component for ethylene polymerization, and the isopentane is dehydrated, the purity of the isopentane meets the requirement of a fluidized bed polymerization reactor on raw materials, and the isopentane does not have adverse effect on the polymerization reaction after being injected into the reactor, so that isopentane is adopted as an organic solvent as a diluent 104 of the antistatic agent 102, and the fluidity of the antistatic agent 102 in a low-temperature environment is increased.
In some embodiments of the invention, the dilution vessel 108 is provided with a first flow detection device and a first flow adjustment device, after determining a second mass of the diluent 104 based on the first mass, comprising delivering the second mass of the diluent 104 into the dilution vessel 108 based on the first flow detection device and the first flow adjustment device.
In this embodiment, the dilution vessel 108 is provided with the first flow rate detecting means and the first flow rate adjusting means, by providing the first flow rate detecting means and the first flow rate adjusting means, and further, the second mass of the diluent 104 can be conveyed into the dilution vessel 108 by adjusting the first flow rate detecting means and the first flow rate adjusting means, so that the accuracy of the filling of the diluent 104 can be improved, thereby realizing the accuracy of the diluted concentration of the antistatic agent 102.
In some embodiments of the present invention, mixing the antistatic agent 102 with the diluent 104 to obtain a mixed solution includes stirring the antistatic agent 102 and the diluent 104 in the dilution vessel 108 for a preset time.
In this embodiment, by adding the antistatic agent 102 and the diluent 104 to the dilution vessel 108, respectively, and stirring the antistatic agent 102 and the diluent 104 in the dilution vessel 108 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 layering, and the filling amount is deteriorated, and therefore, by stirring the antistatic agent 102 and the diluent 104 for a preset time, sufficient fusion of the antistatic agent 102 and the diluent 104 can be ensured, whereby sufficient dilution of the antistatic agent 102 can be achieved.
In some embodiments of the present invention, as shown in fig. 6, the filling method further comprises:
s702, conveying the antistatic agent 102 into the dilution vessel 108;
s704, delivering the diluent 104 into the dilution vessel 108;
S706, mixing the antistatic agent 102 with the diluent 104 in the dilution vessel 108 to obtain a mixed solution;
S708, pumping the mixed solution in the dilution vessel 108 by using the filling pump 110;
At S710, in the case where the pressure of the mixed solution reaches the first pressure threshold, the filling pump 110 delivers the mixed solution into the polymerization vessel 112.
In this embodiment, the filling pump 110 is used to pump the mixed solution in the dilution vessel 108, so that the mixed solution in the dilution vessel 108 can be conveyed, and thus the mixed solution can be filled into the polymerization vessel 112, and the pressure of the mixed solution is regulated, and when the pressure of the mixed solution reaches the first pressure threshold, the filling pump 110 conveys the mixed solution into the polymerization vessel 112, and the pressure of the mixed solution is regulated by the filling pump 110, so that the mixed solution in the dilution vessel 108 can be ensured to enter the polymerization vessel 112, and the filling of the mixed solution is realized.
In some embodiments of the invention, the first pressure threshold is greater than 2200kPa and less than or equal to 2400kPa.
In this embodiment, the adjustment of the pressure of the mixed solution is achieved by setting the first pressure threshold to be greater than 2200kPa and less than or equal to 2400kPa, and the filling of the mixed solution is achieved by setting the first pressure threshold to be 2200kPa to 2400kPa to ensure that the mixed solution in the dilution vessel 108 can enter the polymerization vessel 112.
In some embodiments of the present invention, after delivering the mixed solution into the polymerization vessel 112, the method further comprises detecting a first pressure value at the outlet of the filling pump 110 and closing the outlet of the filling pump 110 if the first pressure value is less than or equal to a second pressure threshold.
In this embodiment, after the mixed solution is fed into the polymerization reaction vessel 112, the first pressure value detection at the outlet of the filling pump 110 is detected, and when the first pressure value is equal to or less than the second pressure threshold value, that is, when the pressure at the outlet of the filling pump 110 is lower than the normal value, the outlet of the filling pump 110 is required to be filled, and the filling of the mixed solution into the polymerization reaction vessel 112 is stopped, so that the backflow of the medium in the polymerization reaction vessel 112 into the line where the mixed solution is injected into the polymerization reaction vessel 112 can be prevented, and the line is blocked.
Specifically, the filling pump 110 is a metering pump, and in order to prevent pressure backflow, a safety interlock is provided at the outlet of the metering pump, and when the pressure of the pump outlet is lower than a normal value, the interlock closes the injection valve, preventing backflow of the medium in the reactor into the line of the mixing solution injection polymerization vessel 112, which would cause line blockage.
In some embodiments of the present invention, the method of filling after the filling pump 110 delivers the mixed solution into the polymerization vessel 112 further comprises detecting a filling rate of the mixed solution into the polymerization vessel 112 and determining an injection amount of the mixed solution based on the filling rate.
In this embodiment, after the filling pump 110 delivers the mixed solution into the polymerization vessel 112, the filling speed of the mixed solution into the polymerization vessel 112 is detected, and the filling amount of the mixed solution is determined according to the filling speed, so that the accuracy of the filling amount of the mixed solution containing the antistatic agent 102 can be ensured, and the purpose of controlling the static electricity of the reactor can be achieved by precisely controlling the filling amount of the mixed solution.
Specifically, a mass flowmeter is arranged at the outlet of the metering pump, and cascade control is performed on the ethylene feeding amount in the polymerization reaction vessel 112 through conversion, so that the injection amount of the mixed solution and the flow of raw material ethylene are controlled, and the purpose of controlling the static electricity of the reactor is achieved.
In some embodiments of the present invention, the method of filling further comprises, after delivering the mixed solution to the polymerization vessel 112, delivering the reaction raw material to the polymerization vessel 112, and mixing the reaction raw material with the mixed solution.
In this embodiment, after the mixed solution is transferred to the polymerization reaction vessel 112, the reaction raw material is transferred to the polymerization reaction vessel 112, and the reaction raw material is mixed with the mixed solution, so that the mixed solution containing the antistatic agent 102 can improve the conductivity in the polymerization system, timely eliminate static electricity generated in the polymerization process, reduce the enrichment of static electricity, thereby maintaining the stability of the polymerization process, enabling the polymerization apparatus to operate stably for a long time, and producing a stable high-quality resin product.
In the embodiment of the present invention, the ratio of the injection amount of the antistatic agent 102 into the polymerization vessel 112 in the mixed solution to the injection amount of the reaction raw material into the polymerization vessel 112 is 0.002% or more and 0.01% or less. In this embodiment, the ratio of the injection amount of the antistatic agent 102 in the mixed solution to the injection amount of the reaction raw material in the polymerization reaction vessel 112 is 0.002% or more and 0.01% or less, thereby realizing the control of the injection amount of the mixed solution, and the purpose of controlling the reactor static electricity is achieved by setting the ratio of the injection amount of the antistatic agent 102 in the mixed solution to the injection amount of the reaction raw material in the polymerization reaction vessel 112 to 0.002% to 0.01%.
Specifically, the ratio of the injection amount of the antistatic agent 102 into the polymerization vessel 112 in the mixed solution to the injection amount of the reaction raw material into the polymerization vessel 112 was equal to 0.002%.
Specifically, the ratio of the injection amount of the antistatic agent 102 into the polymerization vessel 112 to the injection amount of the reaction raw material into the polymerization vessel 112 in the mixed solution was equal to 0.005%.
Specifically, the ratio of the injection amount of the antistatic agent 102 into the polymerization vessel 112 in the mixed solution to the injection amount of the reaction raw material into the polymerization vessel 112 was equal to 0.01%.
In some embodiments of the invention, the temperature of the antistatic agent 102 in the storage container 114 is greater than or equal to 30 ℃ and less than or equal to 40 ℃.
In this embodiment, the temperature of the antistatic agent 102 in the storage container is 30 ℃ or more and 40 ℃ or less to achieve adjustment of the heating temperature of the antistatic agent 102, and by setting the temperature of the antistatic agent 102 in the storage container 114 to 30 ℃ to 40 ℃, it is possible to prevent the difficult filling due to excessive viscosity of the antistatic agent 102 at the time of filling.
Specifically, the temperature of the antistatic agent 102 in the storage container is equal to 30 ℃.
Specifically, the temperature of the antistatic agent 102 in the storage container is equal to 40 ℃.
In some embodiments of the invention, the hold time of the antistatic agent 102 is greater than or equal to 6 hours and less than or equal to 10 hours.
In this embodiment, the hold time of the antistatic agent 102 is greater than or equal to 6 hours and less than or equal to 10 hours to achieve adjustment of the hold or warm-up time of the antistatic agent 102 prior to filling into the dilution vessel 108. By setting the heat-insulating 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 difficult filling caused by the excessive viscosity of the antistatic agent 102 during filling can be prevented, so that the antistatic agent 102 can be conveniently filled.
Specifically, the heat preservation time of the antistatic agent 102 is 6 hours, so that the fluidity of the antistatic agent 102 during filling can be improved, and the viscosity of the antistatic agent 102 can be reduced.
Specifically, the heat preservation time of the antistatic agent 102 is 8 hours, so that the fluidity of the antistatic agent 102 during filling can be improved, and the viscosity of the antistatic agent 102 can be reduced.
Specifically, the heat preservation time of the antistatic agent 102 is 10 hours, so that the fluidity of the antistatic agent 102 during filling can be improved, and the viscosity of the antistatic agent 102 can be reduced.
In some embodiments of the invention, the concentration of antistatic agent 102 in the mixed solution is 10% or more and 20% or less.
In this embodiment, the concentration of the antistatic agent 102 in the mixed solution is 10% or more and 20% or less to achieve adjustment of 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, and too high a concentration can lead to insufficient improvement of the fluidity of the solution, affect injection, and too low a concentration can lead to accumulation of heavy components due to too large addition amount of the solution. By setting the concentration of the antistatic agent 102 to 10% to 20%, the fluidity of the antistatic agent 102 after dilution can be further increased, and the phenomenon of difficult filling in the filling process can be avoided.
Specifically, the concentration of the antistatic agent 102 in the mixed solution is equal to 10%, and thus the fluidity of the antistatic agent 102 after dilution can be increased.
Specifically, the concentration of the antistatic agent 102 in the mixed solution is 15% or more, and thus the fluidity of the antistatic agent 102 after dilution can be increased.
Specifically, the concentration of the antistatic agent 102 in the mixed solution is equal to 20%, and thus the fluidity of the antistatic agent 102 after dilution can be increased.
In some embodiments of the invention, the antistatic agent 102 and the diluent 104 are stirred using a stirrer M.
In this embodiment, the antistatic agent 102 and the diluent 104 are stirred by the stirrer M, so that the antistatic agent 102 and the diluent 104 respectively filled into the dilution vessel 108 can be sufficiently mixed together, so that the mixed solution is layered, and the antistatic agent 102 and the diluent 104 are stirred by the stirrer M, so that the mixed solution is more conveniently and rapidly formed.
In some embodiments of the invention, the diluent 104 is isopentane.
In this example, isopentane is an inert component for the polymerization reaction, and therefore, by setting the diluent 104 as isopentane, the polymerization reaction is not adversely affected after injection into the polymerization reaction vessel 112, isopentane is used as the diluent 104 of the antistatic agent 102, the dilution concentration is moderate, and the solution fluidity and the operation requirement of the polymerization reaction vessel 112 are considered. Solves the problem of poor fluidity of the pure antistatic agent 102, can ensure the dispersibility of the antistatic agent 102 and effectively eliminates the static electricity generated in the operation process of the fluidized bed reactor.
In some embodiments of the present invention, a remote level display is provided on the dilution vessel 108 to facilitate the dilution operation of the antistatic agent 102 by the main operation according to the level of the dilution vessel 108, and prevent interruption of the antistatic agent 102 due to emptying of the antistatic agent 102, resulting in shutdown of the polymerization reactor. To ensure continuous feeding of the antistatic agent 102 during dilution of the antistatic agent 102 in the reactor, a metering standpipe was added to the side of the dilution vessel 108, and a level gauge was added to the metering standpipe to monitor the level change of the metering standpipe. Prior to the dilution operation of the antistatic agent 102, the antistatic agent 102 solution was charged to the metering standpipe to maintain the reactor feed. The top of the dilution vessel 108 is provided with a pressure control system for use in maintaining nitrogen pressure and for pressure-increasing and pressure-decreasing replacement of the system, preventing the polymerization reaction from being affected by the air introduced during the filling process.
In some embodiments of the present invention, in order to reduce the influence of low temperature environment on the antistatic agent 102 and prevent the problems of solvent volatilization caused by local overheating, etc., circulating water heat tracing is added between the storage container 114, the dilution container 108 and the polymerization reaction container 112, and a heat insulation layer with the thickness of 200mm is provided, so that stable injection of the antistatic agent 102 is ensured when the temperature is low in winter, and the problem of poor fluidity of the antistatic agent 102 caused by insufficient local heat tracing of electric heat tracing or transitional heating is solved.
Specifically, in the related art, a pure liquid type polymerization stabilizer (antistatic agent 102) in a barrel is pressurized by a pneumatic barrel pump, then is filled into a high-pressure nitrogen-sealed tank through a drying bed 106, the tank is pressurized to 2700kPa by using high-pressure nitrogen gas at the top of the high-pressure nitrogen-sealed tank, and the antistatic agent 102 is pressurized and fed into a fluidized bed reactor of about 2000 kPa. The bottom of the high-pressure nitrogen seal storage tank is provided with a vertical pipe with the length of 1 meter for the purpose of continuously feeding the antistatic agent 102 to the reactor when the antistatic agent 102 is filled in the high-pressure nitrogen seal storage tank, a pentane flushing line and a high-pressure nitrogen purging line are added to an injection pipeline of the antistatic agent 102 for flushing and purging the injection pipeline to prevent the pipeline from being blocked, and in addition, because the antistatic agent 102 has poor fluidity in a low-temperature environment, electric tracing is added to the pipeline and equipment of the system, the control of about 40 ℃ is maintained, and meanwhile, an insulating layer is arranged for maintaining the temperature of the pipeline. However, the above-mentioned method has the problems that 1, the ionic liquid type polymerization stabilizer has high viscosity and poor fluidity in a low-temperature environment, so that the antistatic agent 102 is frequently unstable to be injected and difficult to be injected, the lump in the reactor is increased, and the stable operation of the reactor is seriously affected. When the temperature is reduced, the feeding flow is unstable, the flow meter is blocked, the wall temperature of the fluidized bed reactor is mild, the static fluctuation is frequent, the lump in the reactor is suddenly increased, and the discharge line is blocked frequently. 2. When the ambient temperature is low, the fluidity of the antistatic agent 102 is poor in the low-temperature environment when the high-pressure nitrogen-sealed storage tank is filled, so that the pneumatic pump is not in charge, and the filling is difficult, and the fluidity of the antistatic agent 102 can be improved by diluting the antistatic agent 102 in the application. 3. Although the pipeline and the equipment of the system adopt electric heat tracing and are provided with the heat insulation layer, the viscosity of the antistatic agent 102 is increased to influence the injection due to the phenomenon that the local pipeline is low or high in temperature caused by inaccurate measurement of a temperature sensor and incomplete heat tracing, and the antistatic agent 102 is diluted in the application, so that the fluidity of the antistatic agent 102 can be improved, the antistatic viscosity is reduced, and the injection of the antistatic agent 102 is facilitated. 4. Because the viscosity of the antistatic agent 102 is overlarge, the display of the on-site magnetic flap liquid level meter is inaccurate, the real liquid level of the vertical pipe cannot be accurately displayed when the antistatic agent 102 is filled into the high-pressure nitrogen-sealed storage tank, and the risk of empty vertical pipe exists.
As shown in fig. 7 and 8, fig. 7 and 8 are schematic flow charts of the antistatic agent diluting system of the present application, wherein the antistatic agent 102 is dried by the drying bed 106, and then enters the diluting container 108, and then the diluting agent 104 is added into the diluting container 108, and the antistatic agent 102 is mixed with the diluting agent 104 to form a mixed solution, and is injected into the polymerization container 112 by the injection pump 110. The diluent 104 is injected into the diluting container 108, and the diluent is injected by a first flow rate detecting device and a first flow rate regulating device, wherein the first flow rate detecting device is a flow valve FV, the first flow rate regulating device is a first flow rate regulating valve FE1, and the storage container 114 is a heat-preserving greenhouse, so that the heat-preserving greenhouse can preserve the antistatic agent 102. In the process of refining the antistatic agent 102, the antistatic agent 102 is conveyed to the refining tank 118 through the first pipeline 116 to be refined, the refined antistatic agent 102 can be conveyed to the dilution vessel 108, and the first pipeline 116 can keep the antistatic agent 102 in the first pipeline 116 warm in a circulating water heat tracing manner, so that the fluidity of the antistatic agent 102 is enhanced. The antistatic agent 102 and the diluent 104, which are fed into the dilution vessel 108, may be stirred by a stirrer M provided in the dilution vessel 108 so that the antistatic agent 102 and the diluent 104 are sufficiently mixed into a mixed solution. The top of the dilution vessel 108 is provided with a pressure control system, nitrogen N 2 can be input into the dilution vessel 108 for pressure maintaining, a first pressure regulating valve PV1 is arranged on a nitrogen N 2 conveying pipeline, and the pressure control system further comprises a pressure regulator FL and a second pressure regulating valve PV2 so as to regulate pressure. The buffer container 120 is added on the side surface of the dilution container 108, and the first liquid level display component LE1 is additionally arranged on the buffer container 120 so as to observe the change of the liquid level in the buffer container 120, and the stability of the mixed solution filling operation is further ensured by arranging the buffer container 120. A second level display means LE2 is also provided on the dilution vessel 108 in order to observe changes in the level of the liquid in the dilution vessel 108.
The diluting 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 a pipeline, thereby realizing that the antistatic agent 102 can remove static electricity generated during polymerization reaction. A second flow rate control valve FE2 and a pneumatic isolation valve 122 are provided in the line between the filling pump 110 and the polymerization vessel 112, so as to control the transfer of the mixed solution into the polymerization vessel 112.
While this specification contains many specific implementation details, these should not be construed as limitations on the scope of any invention or of what may be claimed, but rather as descriptions of features of specific embodiments of particular inventions. Certain features that are described in this specification in the context of separate embodiments can also be implemented in combination in a single embodiment. On the other hand, the various features described in the individual embodiments may also be implemented separately in the various embodiments or in any suitable subcombination. Furthermore, although features may be acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.
Similarly, although operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In some cases, multitasking and parallel processing may be advantageous. Moreover, the separation of various system modules and components in the embodiments described above 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.
Thus, particular embodiments of the subject matter have been described. Other embodiments are within the scope of the following claims. In some cases, the actions recited in the claims can be performed in a different order and still achieve desirable results. Furthermore, the processes depicted in the accompanying drawings are not necessarily required to be in the particular order shown, or sequential order, to achieve desirable results. In some implementations, multitasking and parallel processing may be advantageous.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (19)
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Application publication date: 20250114 |