CN116836493A - Polymer composite material for cables and preparation method thereof - Google Patents
Polymer composite material for cables and preparation method thereof Download PDFInfo
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- CN116836493A CN116836493A CN202310963212.9A CN202310963212A CN116836493A CN 116836493 A CN116836493 A CN 116836493A CN 202310963212 A CN202310963212 A CN 202310963212A CN 116836493 A CN116836493 A CN 116836493A
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- polymerization kettle
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- 239000002131 composite material Substances 0.000 title claims abstract description 28
- 229920000642 polymer Polymers 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 124
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 113
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 113
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000000178 monomer Substances 0.000 claims abstract description 66
- 239000000463 material Substances 0.000 claims abstract description 57
- 229920000915 polyvinyl chloride Polymers 0.000 claims abstract description 30
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 24
- 239000012752 auxiliary agent Substances 0.000 claims description 23
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 229920005989 resin Polymers 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 14
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 13
- 238000009792 diffusion process Methods 0.000 claims description 13
- 230000009471 action Effects 0.000 claims description 11
- BSVQJWUUZCXSOL-UHFFFAOYSA-N cyclohexylsulfonyl ethaneperoxoate Chemical compound CC(=O)OOS(=O)(=O)C1CCCCC1 BSVQJWUUZCXSOL-UHFFFAOYSA-N 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 7
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 claims description 5
- 239000003963 antioxidant agent Substances 0.000 claims description 5
- 230000003078 antioxidant effect Effects 0.000 claims description 5
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 claims description 5
- 235000011187 glycerol Nutrition 0.000 claims description 5
- 239000003999 initiator Substances 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 238000012858 packaging process Methods 0.000 claims description 5
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 10
- 238000012662 bulk polymerization Methods 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 7
- 239000003513 alkali Substances 0.000 description 5
- 238000013459 approach Methods 0.000 description 5
- 239000003595 mist Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 229910001374 Invar Inorganic materials 0.000 description 3
- 238000010924 continuous production Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 238000010558 suspension polymerization method Methods 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000004063 acid-resistant material Substances 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
-
- 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
-
- 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
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
-
- 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
- C08F114/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
- C08F114/02—Monomers containing chlorine
- C08F114/04—Monomers containing two carbon atoms
- C08F114/06—Vinyl chloride
-
- 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
- C08F2/00—Processes of polymerisation
- C08F2/01—Processes of polymerisation characterised by special features of the polymerisation apparatus used
-
- 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
- B01J2204/00—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices
- B01J2204/002—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices the feeding side being of particular interest
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The application relates to the technical field of polymer composite material production, in particular to a polymer composite material for a cable and a preparation method thereof. In order to ensure that the pH value of vinyl chloride monomer is in the range of 4.5-6 during polymerization reaction, the pH value detection equipment and the material regulating device are arranged in the polymerization kettle, the pH value detection equipment is used for detecting the pH value of vinyl chloride monomer, the material regulating device regulates the volume of nitric acid entering the polymerization kettle to be matched with the pH value of vinyl chloride monomer according to the numerical value of the pH value detection equipment, the production efficiency of polyvinyl chloride is improved, and the phenomenon that the pH value of vinyl chloride monomer is possibly not in the range of 4.5-6 due to the fact that the prior polyvinyl chloride production is to add quantitative nitric acid according to the volume of the polymerization kettle is avoided, so that serious kettle sticking phenomenon is caused.
Description
Technical Field
The application relates to the technical field of polymer composite material production, in particular to a polymer composite material for cables and a preparation method thereof.
Background
In order to meet different use conditions, the existing cable can use different polymer composite materials to manufacture protective sleeves, such as polyethylene, polyvinyl chloride, polypropylene, teflon and the like. The existing polyvinyl chloride is generally prepared by adopting a suspension polymerization method and a bulk polymerization method, wherein the suspension polymerization method accounts for 80% of the polyvinyl chloride production in China, compared with the suspension polymerization method, the bulk polymerization method can be free of medium water, a drying process is omitted, the process is simpler, the technology of the bulk polymerization method is not mature enough, and the bulk polymerization method is still in a rapid development stage.
The preparation process of the bulk polymerization method comprises the steps of adding 1/3-1/2 of vinyl chloride monomer and auxiliary agent into a prepolymerization kettle for polymerization, so that 8% -12% of vinyl chloride monomer is polymerized to generate polyvinyl chloride, transferring all materials in the prepolymerization kettle into a post polymerization kettle, adding the rest 1/2-2/3 of vinyl chloride and auxiliary agent into the post polymerization kettle for polymerization, and finally obtaining the conversion rate of 50% -65%. After polymerization, removing unreacted vinyl chloride, condensing and recycling, then, steam stripping the polyvinyl chloride resin, sending the polyvinyl chloride resin to a post-treatment process by a discharging fan, grading and homogenizing to obtain a finished product, and sending the finished product to a packaging process for packaging.
The prior bulk polymerization method adds nitric acid for adjusting pH value and reducing the condition of sticking the material to the kettle when pre-polymerization and post-polymerization are carried out, but the prior production is carried out according to the volume of the polymerization kettle and the average experimental pH value of vinyl chloride monomer after alkali drying, and the specific reference can be made to the reasons and countermeasures of sticking the kettle in the production of polyvinyl chloride by bulk method, but in actual production, the addition of quantitative nitric acid according to the average experimental pH value of vinyl chloride monomer can cause the overall pH value of vinyl chloride to be not in the optimal range of 4.5-6, and even if the effect of nitric acid exists in the condition, serious kettle sticking condition still occurs, so that frequent shutdown is required to treat the kettle sticking, thereby seriously affecting the production efficiency of polyvinyl chloride.
Therefore, a polymer composite material for cables and a preparation method thereof are provided, and the specific pH value of a polyethylene monomer is detected to adjust the adding amount of nitric acid, so that the pH value of vinyl chloride is ensured to be in an optimal range when polymerization reaction occurs.
Disclosure of Invention
The application aims to provide a high polymer composite material for cables and a preparation method thereof, which can furthest reduce the condition of sticking a kettle in a vinyl chloride polymerization reaction by controlling the volume of nitric acid added in each polymerization reaction when a vinyl chloride monomer is in an optimal pH value range, avoid frequent shutdown treatment and kettle sticking during production, and further improve the production efficiency of polyvinyl chloride; the application solves the problems in the background technology by arranging the material adjusting device between the first nitric acid-introducing pipe and the first through hole, and detecting the volume of nitric acid entering the polymerization kettle to participate in the reaction when the pH value of the hypochlorous ethylene monomer is adjusted according to the pH value detection equipment on the feeding pipe by the material adjusting device.
In order to achieve the above purpose, the present application provides the following technical solutions:
a polymer composite material for cables and a preparation method thereof are provided, which comprises the following steps:
s: introducing/-/vinyl chloride monomer of the current polymerization reaction into a prepolymerization reactor, detecting the pH value of the current vinyl chloride monomer by a pH value detection device positioned on a feed pipe, and arranging a material adjusting device between a first pipe for introducing nitric acid and a first through hole, wherein the material adjusting device adjusts the volume of nitric acid which can enter the liner of the prepolymerization reactor according to the pH value;
s: introducing auxiliary agents such as a composite initiator, nitric acid and the like into the liner of the prepolymerization kettle through a plurality of pipes I by a pressure pump, and performing prepolymerization reaction on vinyl chloride and the auxiliary agents under the action of the prepolymerization kettle to generate part of polyvinyl chloride resin;
s: introducing all materials of the prepolymerization reaction and the rest/-/vinyl chloride monomer into a post-polymerization kettle, detecting the pH value of the vinyl chloride monomer by a pH value detection device positioned on a feed pipe, and arranging a material adjusting device between a first pipe for introducing nitric acid and a first through hole, wherein the material adjusting device adjusts the volume of nitric acid which can enter the liner of the post-polymerization kettle according to the pH value;
s: the pressure pump introduces auxiliary agents such as a composite initiator and nitric acid into the liner of the polymerization kettle through a plurality of pipes, and vinyl chloride and the auxiliary agents undergo post polymerization reaction under the action of the post polymerization kettle to generate polyvinyl chloride resin;
s: removing unreacted vinyl chloride monomer in the polymerized material, condensing and recovering, steam stripping polyvinyl chloride resin, conveying to post-treatment process by a discharging fan, grading and homogenizing to obtain the finished product, and conveying to packaging process for packaging.
The existing bulk polymerization method for preparing polyvinyl chloride is generally divided into two steps of prepolymerization and post polymerization, and the two steps are respectively carried out in different polymerization kettles. When the pre-polymerization is carried out, 1/3-1/2 of vinyl chloride monomer of the polymerization reaction is led into a pre-polymerization kettle, and nitric acid (the mass fraction is 20%), PDEH and acetyl-cyclohexyl-sulfonyl peroxide (ACSP) are added to assist in initiating the polymerization reaction, and the conversion rate of the pre-polymerization is generally 8-12%.
After the prepolymerization reaction is finished, all materials in the prepolymerization reactor and the rest 1/2-2/3 of vinyl chloride monomer are introduced into a post-polymerization reactor, and lauroyl peroxide (LP 0), crotonic acid, an antioxidant (BHT), nitric acid (mass fraction is 20%) and glycerol are added for auxiliary reaction, wherein the conversion rate of the post-polymerization reaction is generally 50-65%. After the polymerization reaction is finished, polyvinyl chloride resin and vinyl chloride monomer which does not participate in the reaction exist in a post-polymerization kettle, at the moment, most of the vinyl chloride monomer is recovered through condensation, and because the vinyl chloride monomer has toxicity, the polyvinyl chloride is required to reach the use standard and the value of the vinyl chloride monomer which is required to be removed to be mixed is less than 5ppm, so that the polyvinyl chloride resin is led into a stripping tower to further remove the vinyl chloride monomer which is mixed in the polyvinyl chloride resin, the polyvinyl chloride resin which comes out of the stripping tower is sent to a post-treatment process by a discharging fan, and a finished product is obtained through classification and homogenization and is sent to a packaging process for packaging.
The nitric acid plays a role in regulating the pH value in the polymerization reaction, the existing fresh vinyl chloride monomer is dried by adopting solid alkali, and the recycled vinyl chloride monomer is subjected to alkali washing treatment, so that alkali liquor is easily brought into the vinyl chloride monomer, the vinyl chloride monomer is more alkaline, when the pH value of the vinyl chloride monomer participating in the reaction is in the range of 4.5-6, the kettle sticking phenomenon of the polymerization reaction is very slight, and meanwhile, the nitric acid is also an anti-kettle sticking agent for the vinyl chloride polymerization reaction, so that the kettle sticking degree can be further reduced. However, in the existing process, the quantitative nitric acid is generally added according to the volume of the polymerization kettle when the nitric acid is added, but the pH value of the vinyl chloride monomer is not completely fixed when the vinyl chloride monomer is produced, and the vinyl chloride monomer produced at different times is changed, so that the final pH value of the vinyl chloride monomer is possibly caused to be not within the range of 4.5-6 by adding the quantitative nitric acid, serious kettle sticking phenomenon is caused, the effect of adding the nitric acid is completely opposite to the envisaged effect, frequent cleaning of the polymerization kettle is required, the production efficiency is reduced, and a large amount of manpower and material resources are wasted. The application is characterized in that a material adjusting device is arranged between the first nitric acid-introducing pipe and the first through hole, and the material adjusting device detects that the pH value of the vinyl chloride monomer is adjusted to the volume of nitric acid which enters the polymerization kettle to participate in the reaction according to the pH value detection equipment on the feeding pipe, so that the pH value of the vinyl chloride monomer in each polymerization reaction is ensured to be within the range of 4.5-6.
Preferably, the material adjusting device comprises a piston cylinder fixedly arranged at the top of the inner container of the polymerization kettle, one end of the piston cylinder is fixedly provided with one end of a second pipe and one end of a third pipe, the other end of the second pipe is fixedly connected with one end of the first pipe, the other end of the third pipe is fixedly connected with one end of a through hole, a second check valve is arranged in the third pipe, a first check valve is arranged in the second pipe, the first check valve is opposite to the second check valve in direction, a piston is slidably arranged in the piston cylinder, one end of the piston cylinder, far away from the second pipe, is provided with a second through hole, one side of the piston cylinder is provided with a linear driving unit, the output end of the linear driving unit is in interference fit with the second through hole, an approach switch is arranged on the end face of the output end of the linear driving unit in an embedded mode, the approach switch is positioned in the end face of the output end face of the linear driving unit, the approach switch is electrically connected with a pressure pump, and the pressure required for opening the second check valve is larger than the resistance of the piston when the piston moves in the piston cylinder.
In general, the piston is attached to one side, close to the second pipe, of the inner side wall of the piston cylinder, the linear driving unit adjusts the expansion degree of the output end of the linear driving unit along with the pH value detected by the pH value detecting device, and when the pH value detected by the pH value detecting device is higher, the output end of the linear driving unit is closer to the linear driving unit. When the pressure pump is used for introducing nitric acid into the polymerization kettle, nitric acid can enter the pipe II through the pipe I, then enters the piston cylinder from the pipe II, and pipeline connection modes such as flange connection, clamp connection, welding and the like can be adopted between the pipe I and the pipe II. When the pressure pump stops running, the linear driving unit is started, the output end of the linear driving unit is controlled to push the piston to move towards the direction close to the second pipe, and at the moment, the second pipe is already sealed by the first check valve, so that when the pressure in the piston cylinder is greater than the opening pressure of the second check valve, nitric acid enters the polymerization kettle through the second pipe to participate in polymerization reaction. When the next feeding port is used for feeding again, the output end of the linear driving unit contracts according to the pH value, the pressure pump can be controlled to be started at the moment, the output end of the linear driving unit is not connected with the piston, and therefore the piston cannot move.
When the linear driving unit pushes the piston to move towards the direction close to the second pipe, the piston is stopped when contacting with the inner side wall of the piston cylinder, at the moment, part of nitric acid stays in the second through hole, the third pipe and the second pipe, and during continuous production, the amount of nitric acid entering the polymerization kettle is equal each time because the amount of nitric acid remained in the second through hole, the third pipe and the second pipe is the adjusted adaptive amount of the material adjusting device, but when the material adjusting unit is used for the first time, the third pipe and the second through hole are not provided with nitric acid, so that part of nitric acid is consumed, the quality of nitric acid entering the polymerization kettle is insufficient, and therefore, the material adjusting device needs to perform test operation, and the third pipe and the second through hole are filled with nitric acid to be normally used.
Compared with the flow valve, after the flow valve is closed, the liquid in the pipeline can still continuously flow under the action of other factors such as gravity, inertia and the like, so that the flow valve cannot accurately ensure the volume of nitric acid entering the polymerization kettle, and the material adjusting device is designed.
The linear driving unit can be a device with high linear movement precision such as an electric push rod, a linear motor and the like, so that the error of the linear driving unit is avoided, and the error of the volume of nitric acid entering the polymerization kettle is avoided. The parts of the material adjusting device are made of nitric acid corrosion resistant materials or covered with corrosion resistant coatings, such as ceramics, high polymer materials and the like.
After the application is used for continuous production for 3 months, the frequency of cleaning the adhesive kettle by stopping the polymerization kettle 1 is changed from 1 time per month to 1 time a month, the improvement effect is obvious, the manpower and material resources required for cleaning the adhesive kettle are reduced, the maintenance cost is reduced, and the production efficiency is improved.
Preferably, the second through hole is arranged on one side of the inner side wall of the inner container of the polymerization kettle, and a liquid diffusion unit for enabling nitric acid to uniformly diffuse to all positions of the inner container of the polymerization kettle when entering the inner container of the polymerization kettle is arranged on one side of the inner side wall of the inner container of the polymerization kettle.
The prior polymerization kettle is introduced with nitric acid, the nitric acid only falls on one place in the kettle, and when the polymerization reaction occurs, the stirring unit in the polymerization kettle can uniformly mix all auxiliary agents with the vinyl chloride monomer. However, a certain time is required for uniformly mixing nitric acid and vinyl chloride monomer, and partial kettle sticking can possibly occur in the time period, so that in order to reduce the time required for uniformly mixing nitric acid and improve the effect of reducing the kettle sticking of nitric acid, a liquid diffusion unit is arranged on one side of the inner side wall of the through hole two-position inner container of the polymerization kettle, when nitric acid enters the polymerization kettle from the through hole two-position inner container, the nitric acid can strike the liquid diffusion unit to form splash to be sputtered on most of the area in the kettle instead of only falling on a small area, and at the moment, the nitric acid and the vinyl chloride monomer can be uniformly mixed in a shorter time by stirring, so that the kettle sticking is reduced.
The liquid diffusion unit can be used at the second through hole of the nitric acid and the second through hole of other auxiliary agents, so that the effect of the other auxiliary agents is further improved.
The liquid diffusion unit can be a circular plate arranged at the outlet of the through hole II through the support, a plurality of notches are uniformly formed in the circular plate, when nitric acid impacts the circular plate, circular water mist is formed under the action of the circular plate to sputter around, so that the nitric acid is uniformly scattered into the polymerization kettle, and the polymerization kettle is particularly similar to a fire-fighting nozzle. Or an atomization nozzle can be arranged in the second through hole to spray the nitric acid in a mist form, and the nitric acid is diffused around by taking the second through hole as the center of a circle, so that the nitric acid is uniformly scattered into the polymerization kettle.
Preferably, a conical tube for increasing the spraying pressure of nitric acid is arranged at one end of the through hole II, which is close to the inner side wall of the inner container of the polymerization kettle, and each support is positioned at the edge of one side of the discharge hole of the conical tube, one end of the discharge hole of the conical tube is inclined towards the center direction of the inner container of the polymerization kettle, and the inclination angle is an arctangent function of the distance between the through hole I and the axis of the inner container of the polymerization kettle and the height of the inner container of the polymerization kettle.
In order to increase the kinetic energy of the nitric acid striking the liquid diffusion unit so that the nitric acid becomes more uniform in the form of a mist, the power of the linear driving unit may be increased to increase the moving speed of the piston, and the pressure to which the nitric acid is subjected when entering the polymerizer, thereby increasing the kinetic energy of the nitric acid, but this requires a higher cost to be increased. The application installs a conical tube for increasing the spraying pressure of the nitric acid at one end of the through hole II near the inner side wall of the inner container of the polymerization kettle, one end of the large opening of the conical tube is connected with the through hole II, and one end of the small opening faces into the polymerization kettle, when the output end of the linear driving unit pushes the piston, the nitric acid enters the conical tube from the through hole II and advances along the conical tube, but the speed of the nitric acid is increased and the kinetic energy of the nitric acid is also increased according to Bernoulli principle because the sectional area of the conical tube is smaller and smaller. The cost required for this approach is not high, but the conical tube needs to be made of a nitric acid resistant material.
Because the stirring device is rotatably arranged at the position of the center of the polymerization kettle to stir and mix the vinyl chloride monomer and various auxiliary agents, the first pipe and the first through hole are generally arranged at the eccentric position of the top of the liner, so that nitric acid can vertically fall into the polymerization kettle from the second through hole under normal conditions and cannot uniformly scatter in the polymerization kettle. Under the action of the conical tube and the liquid diffusion unit, nitric acid can be diffused and sputtered to the periphery in a mist form by taking the second through hole as the center of a circle, but because the second through hole is eccentrically arranged at the top of the inner container, nitric acid in the region with the second through hole and the center of the circle being symmetrical still cannot be well scattered. Therefore, the application makes the taper pipe inclined, the inclination angle is the arc tangent function of the distance between the through hole and the axis of the polymerization liner and the height of the polymerization kettle linerWhen the distance from the first through hole to the axis of the polymerization liner is x=1m, the height of the polymerization liner is y=3m, and the inclination angle is alpha=18.44 DEG, so that the small opening of the conical tube is realizedThe opening faces the center of the bottom wall of the inner side of the inner container of the polymerization kettle, and uniformity of nitric acid scattering is improved.
Preferably, a first magnet is embedded at the end part of the output end of the linear driving unit, a second magnet which is mutually exclusive with the first magnet is embedded at one side of the piston close to the linear driving unit, and the first magnet and the second magnet are used for reducing impact between the piston and the output end of the linear driving unit.
In order to prevent the piston from being damaged by the piston or the output end of the linear driving unit due to the fact that larger impact is formed between the piston and the output end of the linear driving unit when the piston moves towards the direction close to the linear driving unit under the action of the pressure pump and nitric acid, the first magnet is arranged at the end part of the output end of the linear driving unit, the second magnet is embedded in one side of the piston close to the linear driving unit, when the piston moves towards the direction close to the linear driving unit, repulsive force is applied, and the repulsive force is larger when the piston is closer to the output end of the linear driving unit, so that the kinetic energy of the piston is reduced, and the impact with the output end of the linear driving unit is reduced. The maximum repulsive force between the first magnet and the second magnet plus the resistance force when the piston moves is smaller than the opening pressure of the one-way valve II.
Preferably, a circular ring for increasing stability of the piston during movement is arranged at the edge of the piston, which is close to the second side of the through hole, and the output end of the linear driving unit and the piston are coaxial.
Because the piston is slidably arranged in the piston cylinder and is not connected with any other connecting rod, in order to increase the stability of the piston during movement and prevent the piston from being blocked, the edge of the piston, which is close to one side of the through hole II, is provided with the circular ring, so that the contact area between the piston and the piston cylinder is increased, and the coaxiality of the piston and the piston cylinder is ensured. Material consumption and cost are reduced compared to increasing the length of the piston. Meanwhile, the output end of the linear driving unit and the piston are arranged to be coaxial, so that the center of the piston is stressed when the output end of the linear driving unit pushes the piston to move, the whole stress of the piston is uniform, and the situation that the piston is blocked due to uneven stress is prevented, so that the material adjusting device is invalid.
Preferably, the piston and the piston cylinder are made of the same material with small thermal deformation coefficient, the bottom of the piston cylinder and the bottom of the linear driving unit are provided with heat insulation plates, and a plurality of cooling fins are fixedly arranged between one side of the heat insulation plates, which is far away from the piston cylinder, and the top of the inner container of the polymerization kettle.
The piston and the piston cylinder are made of the same material with low thermal deformation coefficient, such as alloy invar or PPS+GF30%, and the like, taking the alloy invar as an example, the linear expansion coefficient is 0.0000015/DEG C, the bulk expansion coefficient is 0.0000045/DEG C, the polymerization reaction can raise the polymerization kettle from normal temperature (15-30 ℃) to 62 ℃, and the alloy invar is approximately equal to unchanged under the change of tens of degrees. And install fin and heat insulating board between piston cylinder bottom and polymeric kettle inner bag, reduce the heat transfer of polymeric kettle inner bag to the piston cylinder, reduce the influence of the change of thermal deformation leading to piston cylinder volume to the error that the material adjusting device caused. Rock wool, glass wool and the like can be used as the heat insulating plate.
And when the thermal deformation occurs, the thermal deformation coefficients of the piston and the piston cylinder are equal, so that the situation that a gap is formed between the piston and the piston cylinder due to volume change, nitric acid enters one side of the piston, which is close to the second through hole, and an error occurs in the material adjusting device is avoided. The application adjusts the volume of nitric acid entering the polymerization kettle according to the direction that the final pH value of vinyl chloride monomer becomes the intermediate value of 4.5-6 and 5.25. The adjustment mode ensures that the pH value range of the vinyl chloride monomer does not exceed 4.5-6 even if the material adjustment device has a little deviation.
Preferably, the main component of the polymer composite material for the cable is vinyl chloride monomer during polymerization reaction, and the mass and the components of the auxiliary agent are respectively as follows: PDEH in 0.01-0.02 wt% of vinyl chloride monomer, acetyl Cyclohexyl Sulfonyl Peroxide (ACSP) in 0.01-0.04 wt% of vinyl chloride monomer, dodecanoyl peroxide (LP 0) in 01-0.4 wt% of vinyl chloride monomer, crotonic acid in 100-300g, antioxidant (BHT) in 1800-2000g, nitric acid in 700-800ml (20 wt%), and glycerin in 700-3000 ml.
PDEH, lauroyl peroxide (LP 0) and Acetyl Cyclohexyl Sulfonyl Peroxide (ACSP) are used as an initiator to initiate polymerization, crotonic acid is used as a thickener to adjust the viscosity, the porosity and the porosity of a product, an antioxidant (BHT) is used for preventing oxygen in a polymerization kettle from affecting the polymerization reaction, nitric acid (the mass fraction is 20%) is used for adjusting the pH value and preventing the kettle from being stuck, and glycerol is used as a lubricant to increase the fluidity of polyvinyl chloride resin in the discharging process.
Compared with the prior art, the application has the beneficial effects that:
1. in the existing preparation method of the polyvinyl chloride polymer composite material, nitric acid is required to be added to adjust the pH value of the vinyl chloride monomer during the polymerization reaction, so that the frequency of stopping and cleaning a sticking kettle is reduced, and the production efficiency is improved. According to the application, the material adjusting device is arranged between the first nitric acid-introduced pipe and the first through hole, the material adjusting device detects the volume of nitric acid which enters the polymerization kettle to participate in the reaction when the pH value of the hypochlorous ethylene monomer is adjusted according to the pH value detection equipment on the feed pipe, the pH value of the chloroethylene monomer in each polymerization reaction is ensured to be within the range of 4.5-6, the effect that the adhesion of the kettle cannot be reduced due to excessive or insufficient nitric acid is avoided, the frequency of stopping and cleaning the adhesion kettle is reduced, the production efficiency is ensured, meanwhile, the generation of adhesion kettle products by grafting polymerization between polyvinyl chloride and the kettle wall is reduced, and the yield of polyvinyl chloride is improved.
2. Through installing conical tube and liquid diffusion unit in the second one end that is close to the inner wall of the polymeric kettle inner bag of through-hole, the one end of liquid diffusion unit and conical tube discharge gate is toward polymeric kettle inner bag centre of a circle direction slope, when nitric acid from second entering polymeric kettle inner bag of through-hole, nitric acid can high-speed impact liquid diffusion unit form vaporific and use conical tube port to spread outwards as the centre of a circle for nitric acid just can be even before beginning the polymerization, reduce nitric acid and vinyl chloride monomer stirring mix even time in the polymeric kettle, improve the antiseized effect of kettle of nitric acid.
3. The piston and the piston cylinder are made of the same material with low thermal deformation coefficient, and the radiating fin is arranged between the bottom of the piston cylinder and the inner container of the polymerization kettle, so that the influence of the volume change of the piston cylinder on the error caused by the material adjusting device due to thermal deformation is reduced.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present application;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a partial view at B in FIG. 2;
FIG. 4 is a schematic view of a material adjusting device according to the present application;
fig. 5 is a sectional view of B-B in fig. 4.
In the figure: 1. a polymerization kettle; 101. a feed pipe; 201. a first tube; 202. a second pipe; 203. a third tube; 301. a first through hole; 302. a second through hole; 4. a piston cylinder; 501. a first check valve; 502. a second check valve; 6. a piston; 7. a linear driving unit; 8. a proximity switch; 9. a liquid diffusion unit; 901. a bracket; 902. a wafer; 10. a conical tube; 1101. a first magnet; 1102. a second magnet; 12. a heat insulating plate; 13. a heat sink.
Detailed Description
The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to fig. 1 to 5 of the drawings, and it is apparent that the embodiments of the present application include, but are not limited to, the embodiments described below. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms "first" and "second" in the present application are used for the purpose of describing the order of objects only, and are not intended to represent relative importance or to describe the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. The term "plurality" as used in the present application means at least two.
Referring to fig. 1 to 5, the present application provides a polymer composite material for cables and a preparation method thereof, and the technical scheme is as follows:
s1: introducing 16.5t of vinyl chloride monomer into the 50M3 prepolymerization reactor 1, detecting that when the pH value of the vinyl chloride monomer is 9 by a pH value online detector positioned on a feed pipe 101, adjusting 700ml of nitric acid which can enter the inner container of the 50M3 prepolymerization reactor 1 according to the pH value by a material adjusting device arranged between a first pipe 201 for introducing nitric acid and a first through hole 301;
s2: introducing 2.475kg of PDEH, 4.125kg of Acetyl Cyclohexyl Sulfonyl Peroxide (ACSP) and 700ml of nitric acid (the mass fraction is 20%) into the liner of the prepolymerization reactor 1 through a plurality of first pipes 201, raising the temperature in the prepolymerization reactor 1 to 62 ℃, and carrying out prepolymerization reaction on vinyl chloride monomer and auxiliary agent under the action of the 50M3 prepolymerization reactor 1 to generate partial polyvinyl chloride resin with the conversion rate of 10%;
s3: introducing all materials of 50M3 prepolymerization reaction and 20t of vinyl chloride monomer into a polymerization kettle 1 after 50M3, detecting that the pH value of the vinyl chloride monomer is 9 by a pH value online detector positioned on a feed pipe 101, and adjusting the volume of nitric acid which can enter the inner container of the polymerization kettle 1 according to the pH value by a material adjusting device arranged between a first pipe 201 for introducing nitric acid and a first through hole 301;
s4: 73kg of lauroyl peroxide (LP 0), 250g of crotonic acid, 1950g of antioxidant (BHT), 2100ml of glycerol and 850ml of nitric acid (mass fraction is 20%) are respectively introduced into the liner of a 50M3 post-polymerization kettle 1 through a plurality of pipes 201, and then vinyl chloride and an auxiliary agent undergo post-polymerization under the action of the 50M3 post-polymerization kettle 1 to generate polyvinyl chloride resin, wherein the conversion rate is 60%;
s5: removing unreacted vinyl chloride monomer in the polymerized material, condensing and recovering, steam stripping polyvinyl chloride resin, conveying to post-treatment process by a discharging fan, grading and homogenizing to obtain the finished product, and conveying to packaging process for packaging.
Embodiment one, when the piston 6 cylinder and the linear drive unit 7 are not used for the first time.
Referring to FIG. 4, when vinyl chloride monomer enters the polymerizer 1 from the feed inlet, the pH detecting device willThe pH value of the vinyl chloride monomer is detected, and then the degree of expansion of the output end of the linear driving unit 7 is adjusted according to the pH value, and here, taking a linear motor as an example, when the pH value detected by the pH value detecting device is higher, the output end of the linear motor is closer to the linear motor, and when the piston 6 contacts with the output end of the linear motor, the larger the space of the piston 6, which is close to the side of the second pipe 202, is, the larger the volume of nitric acid entering the polymerizer 1 is. Conversely, the lower the pH value, the farther the linear motor output is from the linear motor, and the smaller the space on the side of the piston 6 closer to the second tube 202 when the piston 6 contacts the linear motor output. At this time, the volume of nitric acid to be added is 700ml, and the sectional area of the cavity of the piston cylinder 4 is 20m 2 The length of the piston 6 is 5cm, so that the distance between the output end of the linear motor and the inner side wall of the piston cylinder 4 near the end of the third tube 203 is 40cm.
When the pressure pump introduces nitric acid into the second pipe 202 through the first pipe 201, the first check valve 501 installed in the second pipe 202 is oriented such that nitric acid can enter the piston 6 cylinder from the second pipe 202, but nitric acid in the piston 6 cylinder cannot enter the second pipe 202 through the first check valve 501, and the second check valve 502 is opposite to the first check valve. Since the opening pressure of the second check valve 502 is greater than the resistance to movement of the piston 6, nitric acid does not enter the third tube 203 through the second check valve 502. When the piston 6 moves to approach the linear motor output end, the second magnet 1102 on the piston 6 and the first magnet 1101 on the linear motor output end generate mutual repulsive force, so that the kinetic energy of the piston 6 is reduced, the impact when the piston 6 contacts the linear motor output end is reduced, and the piston 6, the linear motor output end or the proximity switch 8 is prevented from being damaged. When the piston 6 contacts with the output end of the linear motor, the piston 6 stops moving, the proximity switch 8 is triggered, the pressure pump stops starting, the linear motor starts starting, the output end of the linear motor stretches out to move to push the piston 6 to move 35cm towards the direction close to the second pipe 202, at the moment, the contact position of the output end of the linear motor and the piston 6 is located at the center of the piston 6, so that the piston 6 is uniformly stressed when being pushed, and the piston 6 is prevented from being blocked when being pushed by the output end of the linear motor.
When the piston 6 moves in the direction approaching the second pipe 202, the first check valve 501 is closed, and the second check valve 502 is opened, so that nitric acid in the cylinder of the piston 6 enters the conical pipe 10 through the third pipe 203 under the action of the piston 6, and referring to fig. 2-3, the velocity of the nitric acid is increased due to the fact that the sectional area of the conical pipe 10 is smaller and smaller according to the bernoulli principle. Therefore, when the nitric acid is discharged from the conical tube 10, the nitric acid can strike on the wafer 902 at a high speed to form mist and spread outwards by taking the port of the conical tube 10 as the center of a circle, so that the nitric acid can be uniformly scattered in the polymerization kettle 1 before the polymerization reaction is not started. When the piston 6 contacts the inner side wall of the end of the piston 6 cylinder, on which the second pipe 202 is arranged, the linear motor stops starting, and the output end of the piston 6 and the linear motor can be kept at a position until the next time the feeding pipe 101 re-enters the vinyl chloride monomer.
After the application is used for continuous production for 3 months, the frequency of cleaning the adhesive kettle by stopping the polymerization kettle 1 is changed from 1 time per month to 1 time a month, the improvement effect is obvious, the manpower and material resources required for cleaning the adhesive kettle are reduced, the maintenance cost is reduced, and the production efficiency is improved.
In the second embodiment, when the piston 6 cylinder and the linear drive unit 7 are used for the first time.
When the material adjusting device is used for the first time, the second through hole 302, the conical tube 10 and the third through hole 203 are not filled with nitric acid, so that when the output end of the linear motor pushes the piston 6 to squeeze nitric acid, nitric acid sequentially passes through the third through hole 302, the conical tube 10 and the third through hole 203 and finally enters the polymerization kettle 1. When the piston 6 moves to the limit position, the piston 6 cylinder stops discharging nitric acid outwards, but at this time, because the third pipe 203, the second through hole 302 and the conical pipe 10 are in a negative pressure state, a part of nitric acid stays in the third pipe 203, the second through hole 302 and the conical pipe 10, so that the quality of nitric acid entering the polymerization kettle 1 is insufficient, the pH value adjustment is affected, and the effect of nitric acid cannot be achieved. Therefore, the material adjusting device needs to be tested, and the third pipe 203 and the second through hole 302 are filled with nitric acid for normal use.
In the third embodiment, when the polymerizer 1 is used for producing other polymer materials.
The material adjusting device can be used for adjusting a proper amount of nitric acid, and can also be used for adjusting other auxiliary agents with relatively strict requirements, but the material adjusting device is required to be adjusted according to the characteristics of the auxiliary agents, such as an alkaline strength auxiliary agent, an alkali-resistant material is required to be used for manufacturing, and when the material adjusting device is used for auxiliary agents which are easy to solidify at low temperature, a heating unit is required to be added, so that the auxiliary agents are prevented from solidifying in the piston 6 cylinder, the pipe III 203 and the conical tube 10, and the material adjusting device is blocked and fails. Meanwhile, the heating unit can be used for stabilizing the temperature, so that the situation that the volume of the piston cylinder 4 is unstable and errors occur in the material adjusting device due to the fact that the piston cylinder 4 expands with heat and contracts with cold is prevented.
Although a number of embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made in the state and details of these embodiments without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The preparation method of the polymer composite material for the cable is characterized by comprising the following steps of:
s1: introducing 1/3-1/2 of vinyl chloride monomer subjected to secondary polymerization into a pre-polymerization kettle (1), detecting the pH value of the vinyl chloride monomer subjected to secondary polymerization by a pH value detection device positioned on a feed pipe (101), and arranging a material adjusting device between a first pipe (201) for introducing nitric acid and a first through hole (301), wherein the material adjusting device adjusts the volume of nitric acid which can enter the liner of the pre-polymerization kettle (1) according to the pH value;
s2: introducing auxiliary agents such as a composite initiator, nitric acid and the like into the liner of the pre-polymerization kettle (1) through a plurality of first pipes (201) by a pressure pump, and performing a pre-polymerization reaction on vinyl chloride and the auxiliary agents under the action of the pre-polymerization kettle (1) to generate part of polyvinyl chloride resin;
s3: introducing all materials of the prepolymerization reaction and the rest 1/2-2/3 of vinyl chloride monomer into a post-polymerization kettle (1), detecting the pH value of the vinyl chloride monomer by a pH value detection device positioned on a feed pipe (101), and arranging a material adjusting device between a first pipe (201) for introducing nitric acid and a first through hole (301), wherein the material adjusting device can adjust the volume of nitric acid which can enter the liner of the post-polymerization kettle (1) according to the pH value;
s4: the pressure pump is used for respectively introducing auxiliary agents such as a composite initiator, nitric acid and the like into the liner of the back polymerization kettle (1) through a plurality of first pipes (201), and performing back polymerization reaction on vinyl chloride and the auxiliary agents under the action of the back polymerization kettle (1) to generate polyvinyl chloride resin;
s5: removing unreacted vinyl chloride monomer in the polymerized material, condensing and recovering, steam stripping polyvinyl chloride resin, conveying to post-treatment process by a discharging fan, grading and homogenizing to obtain the finished product, and conveying to packaging process for packaging.
2. The method for preparing the polymer composite material for the cable according to claim 1, wherein the method comprises the following steps: the material adjusting device comprises a piston cylinder (4) fixedly arranged at the top of an inner container of a polymerization kettle (1), one end of the piston cylinder (4) is fixedly provided with one end of a second pipe (202) and one end of a third pipe (203), the other end of the second pipe (202) is fixedly connected with one end of a first pipe (201), the other end of the third pipe (203) is fixedly connected with a first through hole (301), a first check valve (501) and a second check valve (502) are respectively arranged in the second pipe (202) and the third pipe (203), the directions of the first check valve (501) and the second check valve (502) are opposite, the pressure required for opening the second check valve (502) is larger than the resistance of the piston (6) when the piston (6) moves in the piston cylinder (4), the piston (6) is slidably arranged in the piston cylinder (4), one end of the piston cylinder (4) far away from the second pipe (202) is provided with a second through hole (302), one side of the second through hole (302) is provided with a linear driving unit (7), the linear driving unit (7) is arranged on one side of the second through hole (302), the linear driving unit (7) is matched with the second linear driving unit (302), the linear driving unit is provided with an output end (8), and the linear driving unit (302) is matched with an end face, and is arranged on an end face of the pump (8, the first through hole (301) is positioned on one side of the inner side wall of the inner container of the polymerization kettle (1), and a liquid diffusion unit (9) used for enabling nitric acid to uniformly diffuse to all positions of the inner container of the polymerization kettle (1) when entering the inner container of the polymerization kettle (1) is arranged on one side of the inner side wall of the inner container of the polymerization kettle.
3. The method for preparing a polymer composite material for cables according to claim 2, wherein: the liquid diffusion unit (9) comprises a plurality of supports (901) arranged at the edge of one side of the inner side wall of the liner of the polymerization kettle (1) and positioned at the through hole I (301), a wafer (902) is fixedly arranged on one side, close to the through hole I (301), of each support (901), and a plurality of notches are uniformly formed in the wafer (902).
4. A method for producing a polymer composite for cables according to claim 3, wherein: and a conical tube (10) for increasing the spraying pressure of nitric acid is arranged at one end of the second through hole (302) close to the inner side wall of the inner container of the polymerization kettle (1), and each bracket (901) is positioned at the edge of one side of the discharge hole of the conical tube (10).
5. The method for preparing a polymer composite material for cables according to claim 4, wherein: one end of the discharge hole of the conical tube (10) is inclined towards the center direction of the liner of the polymerization kettle (1), and the inclination angle is an arctangent function of the distance between the first through hole (301) and the axis of the liner of the polymerization kettle (1) and the height of the liner of the polymerization kettle (1).
6. The method for preparing a polymer composite material for cables according to claim 2, wherein: the end part of the output end of the linear driving unit (7) is embedded with a first magnet (1101), one side, close to the linear driving unit (7), of the piston (6) is embedded with a second magnet (1102) which is mutually exclusive with the first magnet (1101), and the first magnet (1101) and the second magnet (1102) are used for reducing impact between the piston (6) and the output end of the linear driving unit (7).
7. The method for preparing a polymer composite material for cables according to claim 2, wherein: the piston (6) and the piston cylinder (4) are made of the same material with small thermal deformation coefficient.
8. The method for preparing a polymer composite material for cables according to claim 2, wherein: the heat insulation plate (12) is installed at the bottoms of the piston cylinder (4) and the linear driving unit (7), and a plurality of cooling fins (13) are fixedly installed between one side, far away from the piston cylinder (4), of the heat insulation plate (12) and the top of the liner of the polymerization kettle (1).
9. A polymer composite material for cables, prepared by the method for preparing a polymer composite material for cables according to any one of claims 1 to 8, characterized in that:
the main component of the polymer composite material is vinyl chloride monomer during polymerization reaction, and the mass and the components of the auxiliary agent are respectively as follows: PDEH in 0.01-0.02 wt% of vinyl chloride monomer, acetyl Cyclohexyl Sulfonyl Peroxide (ACSP) in 0.01-0.04 wt% of vinyl chloride monomer, dodecanoyl peroxide (LP 0) in 01-0.4 wt% of vinyl chloride monomer, crotonic acid in 100-300g, antioxidant (BHT) in 1800-2000g, nitric acid in 700-800ml (20 wt%), and glycerin in 700-3000 ml.
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| CN211537685U (en) * | 2019-12-10 | 2020-09-22 | 新疆中泰新鑫化工科技股份有限公司 | Automatic feeding device for anti-sticking kettle agent in polymerization production of polyvinyl chloride resin by bulk method |
| CN216172136U (en) * | 2020-12-30 | 2022-04-05 | 大连仁昌石化设备有限公司 | Piston push type feeding device for reaction kettle |
| CN115197351A (en) * | 2022-07-06 | 2022-10-18 | 新疆中泰化学托克逊能化有限公司 | Vinyl chloride resin material and preparation method thereof |
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| US4275822A (en) * | 1978-02-13 | 1981-06-30 | Bayer Aktiengesellschaft | Apparatus for metering at least two reaction components into a mixing chamber |
| US4275822B1 (en) * | 1978-02-13 | 1986-09-16 | ||
| CN205032174U (en) * | 2015-10-08 | 2016-02-17 | 罗田广惠化工有限责任公司 | Do benefit to glyoxalic acid reaction unit of control raw materials input |
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| CN216172136U (en) * | 2020-12-30 | 2022-04-05 | 大连仁昌石化设备有限公司 | Piston push type feeding device for reaction kettle |
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