CN113859985A - System and method for preventing powder conveying pipeline from being blocked - Google Patents
System and method for preventing powder conveying pipeline from being blocked Download PDFInfo
- Publication number
- CN113859985A CN113859985A CN202111142494.3A CN202111142494A CN113859985A CN 113859985 A CN113859985 A CN 113859985A CN 202111142494 A CN202111142494 A CN 202111142494A CN 113859985 A CN113859985 A CN 113859985A
- Authority
- CN
- China
- Prior art keywords
- mixed material
- powder
- conveying
- antistatic agent
- mixing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000843 powder Substances 0.000 title claims abstract description 122
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000002156 mixing Methods 0.000 claims abstract description 89
- 239000002216 antistatic agent Substances 0.000 claims abstract description 87
- 239000000463 material Substances 0.000 claims abstract description 83
- 230000008569 process Effects 0.000 claims abstract description 18
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 3
- 238000003860 storage Methods 0.000 claims description 40
- 238000000605 extraction Methods 0.000 claims description 28
- 230000001133 acceleration Effects 0.000 claims description 25
- 239000002002 slurry Substances 0.000 claims description 21
- 239000002904 solvent Substances 0.000 claims description 14
- 239000000725 suspension Substances 0.000 claims description 10
- 230000005484 gravity Effects 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- 125000000129 anionic group Chemical group 0.000 claims description 7
- 125000002091 cationic group Chemical group 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000011268 mixed slurry Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 2
- 230000003068 static effect Effects 0.000 abstract description 24
- 238000009825 accumulation Methods 0.000 abstract description 19
- 230000005611 electricity Effects 0.000 abstract description 15
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 16
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 9
- 241000273930 Brevoortia tyrannus Species 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 238000005086 pumping Methods 0.000 description 6
- OCKWAZCWKSMKNC-UHFFFAOYSA-N [3-octadecanoyloxy-2,2-bis(octadecanoyloxymethyl)propyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(COC(=O)CCCCCCCCCCCCCCCCC)(COC(=O)CCCCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCCCC OCKWAZCWKSMKNC-UHFFFAOYSA-N 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 5
- 239000000428 dust Substances 0.000 description 5
- 239000002202 Polyethylene glycol Substances 0.000 description 4
- -1 amine salt Chemical class 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 229920001223 polyethylene glycol Polymers 0.000 description 4
- 229940051841 polyoxyethylene ether Drugs 0.000 description 4
- 229920000056 polyoxyethylene ether Polymers 0.000 description 4
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical compound CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 150000003512 tertiary amines Chemical class 0.000 description 2
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
- MUHFRORXWCGZGE-KTKRTIGZSA-N 2-hydroxyethyl (z)-octadec-9-enoate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCCO MUHFRORXWCGZGE-KTKRTIGZSA-N 0.000 description 1
- RFVNOJDQRGSOEL-UHFFFAOYSA-N 2-hydroxyethyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCO RFVNOJDQRGSOEL-UHFFFAOYSA-N 0.000 description 1
- XHUSBNLUTNJLKB-UHFFFAOYSA-N C(CCCCCCCCCCCCCCCCC)(=O)O.CN(CCCCC)C Chemical compound C(CCCCCCCCCCCCCCCCC)(=O)O.CN(CCCCC)C XHUSBNLUTNJLKB-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- HVUMOYIDDBPOLL-XWVZOOPGSA-N Sorbitan monostearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O HVUMOYIDDBPOLL-XWVZOOPGSA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- LWZFANDGMFTDAV-BURFUSLBSA-N [(2r)-2-[(2r,3r,4s)-3,4-dihydroxyoxolan-2-yl]-2-hydroxyethyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O LWZFANDGMFTDAV-BURFUSLBSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 125000000033 alkoxyamino group Chemical group 0.000 description 1
- 150000008052 alkyl sulfonates Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- VBICKXHEKHSIBG-UHFFFAOYSA-N beta-monoglyceryl stearate Natural products CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- LMBWSYZSUOEYSN-UHFFFAOYSA-N diethyldithiocarbamic acid Chemical compound CCN(CC)C(S)=S LMBWSYZSUOEYSN-UHFFFAOYSA-N 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-M dihydrogenphosphate Chemical compound OP(O)([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-M 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- YVIGPQSYEAOLAD-UHFFFAOYSA-L disodium;dodecyl phosphate Chemical compound [Na+].[Na+].CCCCCCCCCCCCOP([O-])([O-])=O YVIGPQSYEAOLAD-UHFFFAOYSA-L 0.000 description 1
- 239000012990 dithiocarbamate Substances 0.000 description 1
- 229950004394 ditiocarb Drugs 0.000 description 1
- WCHFOOKTKZYYAE-UHFFFAOYSA-N ethoxyperoxyethane Chemical compound CCOOOCC WCHFOOKTKZYYAE-UHFFFAOYSA-N 0.000 description 1
- 229940095098 glycol oleate Drugs 0.000 description 1
- 229940100242 glycol stearate Drugs 0.000 description 1
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- JQDYLDJOLNKPHG-UHFFFAOYSA-N octadecanoate;trimethylazanium Chemical compound CN(C)C.CCCCCCCCCCCCCCCCCC(O)=O JQDYLDJOLNKPHG-UHFFFAOYSA-N 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000011067 sorbitan monolaureate Nutrition 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/36—Arrangements of containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/46—Gates or sluices, e.g. rotary wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/50—Pneumatic devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/58—Devices for accelerating or decelerating flow of the materials; Use of pressure generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
The invention provides a system for preventing a powder conveying pipeline from being blocked and a method for preventing the powder conveying pipeline from being blocked, and particularly relates to a method for preventing the powder conveying pipeline from being blocked, wherein a mixing bin containing an antistatic agent is arranged at the upstream of the powder conveying pipeline, so that powder to be conveyed and the antistatic agent are mixed in the mixing bin and then enter the powder conveying pipeline. And further, static electricity generated by friction among powder materials, between the powder materials and conveying gas and between the powder materials and a conveying pipeline in the conveying process can be remarkably reduced, and especially, the static electricity accumulation of the conveying pipeline in a conveying system at the flange connection part and the steering elbow is reduced, so that the frequency of blockage of the conveying pipeline in the conveying system is reduced.
Description
Technical Field
The invention belongs to the technical field of powder conveying and maintenance, and particularly relates to a system and a method for preventing a powder conveying pipeline from being blocked.
Background
In the process of conveying powder by a pneumatic conveying system, static electricity is inevitably generated due to friction among powder, between the powder and conveying gas, between the powder and a conveying pipeline and the like. Because the conveying pipeline is often long, a plurality of flange connectors inevitably exist, and the flange connectors and the inner environment of the conveying pipeline have certain difference, so that static electricity accumulation is easily caused; in addition, because of the need of turning, a plurality of turning pipe parts, such as a turning pipe which changes from the horizontal direction to the vertical direction, a turning pipe which changes from different horizontal directions to each other, are inserted into the conveying pipeline, and static electricity accumulation is also easily caused at the turning pipe parts. The electrostatic accumulation can cause the powder to be adsorbed on the wall of the conveying pipe, the flange connecting port and the bent pipe, and the accumulation to a certain degree can cause the blockage of the conveying pipeline system, thereby influencing the continuous production and the quality of downstream products. Therefore, in the technical field of powder conveying, the problems of static generation and static accumulation in the conveying process are urgently needed to be solved, and then the blockage of a powder conveying pipeline system is prevented.
At present, the general measures for reducing the generation and accumulation of static electricity in the conveying pipeline mainly comprise: (1) the quality of the conveying pipeline is ensured, and no static accumulation points such as burrs, protrusions and the like exist in the conveying pipeline; (2) according to the national standard, various flanges and valves of a conveying pipeline and a conveying system must be connected with the ground in a bridging way; (3) the management of an air conveying system is enhanced, and the pipeline of the conveying system is subjected to sand blasting treatment periodically so as to improve the running condition of particles in the conveying pipeline and reduce the generation of dust, thereby reducing the generation amount of static electricity; (4) an ionic wind pipeline powder static eliminator is used.
The above measures are to reduce the electrostatic accumulation of the powder in the conveying pipeline to a certain extent through the setting of the environment, but the above measures cannot eliminate the static generated in the powder conveying process, and cannot fundamentally solve the problem of the electrostatic accumulation of the powder in the conveying process, so that the problem of the blockage of the powder conveying pipeline system caused by the electrostatic accumulation cannot be completely eliminated.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a system for preventing a powder conveying pipeline from being blocked and an anti-blocking method, which are used for reducing the generation of static electricity and reducing the accumulation of the static electricity, so that the powder conveying pipeline system is smoothly conveyed, and the problem of blocking of the powder conveying pipeline system is fundamentally solved.
A system for preventing blockage of a powder delivery conduit, comprising: the device comprises a fan, a storage bin, an air extraction chamber, a mixing acceleration chamber, a three-way reversing valve and a using process bin, and is characterized in that all the components are connected through a conveying pipeline and/or a bent pipe and a flange, and the upstream of the storage bin is also provided with the mixing bin containing an antistatic agent.
The bottom of the storage bin is provided with a storage bin bottom valve; a rotary feeding valve is arranged between the air pumping chamber and the mixing acceleration chamber;
the mixing bin is connected with the storage bin through a screw and a flange, the relative position of the mixing bin and the storage bin is not specifically limited, and the mixing bin is preferably arranged above the storage bin;
a mixing bin valve is arranged between the fan for air flow mixing and the mixing bin;
the fan for air flow mixing is connected to one end of the mixing bin valve through a conveying pipeline;
the spiral conveyor is connected to the other end of the mixing bin valve through a conveying pipeline and a flange;
the air extraction chamber is arranged below the storage bin and is connected with the storage bin through a conveying pipeline and a storage bin bottom valve;
the mixing acceleration chamber is connected to an upper air extraction chamber through a rotary feeding valve and is connected to a horizontally arranged fan through a pipeline;
the mixing acceleration chamber is connected to the bins of each use procedure through a conveying pipeline, a bent pipe, a flange and a three-way steering valve.
Optionally, dust collectors are arranged at the tops of the mixing bin and the using procedure bin.
Optionally, the powder conveying pipeline blocking system further comprises an air flow dryer, and the air flow dryer is connected with the mixing bin through a pipeline.
Further, the method for mixing the antistatic agent into the mixing bunker comprises the following steps: the powder and the antistatic agent are added in proportion.
Further, the powder is ultra-high molecular weight polyethylene powder;
further, the antistatic agent is solid powder;
further, the antistatic agent is an antistatic active compound of an anionic antistatic agent, a cationic antistatic agent, a nonionic antistatic agent or a zwitterionic antistatic agent.
Optionally, the anionic antistatic agent is an anionic antistatic agent such as alkyl sulfonate, sulfate, phosphate, dithiocarbamate, carboxylate, and the like, such as sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, sodium dodecyl sulfate, sodium dodecyl phosphate, sodium diethyldithiocarbamate, and the like.
Optionally, the cationic antistatic agent is amine salt, quaternary ammonium salt, alkoxy amino acid salt, and other cationic antistatic agents, such as trimethyl ammonium stearate, dimethyl amyl ammonium stearate, alkyl tertiary amine nitrate, alkyl tertiary amine sulfate, stearamidopropyl dimethyl-beta-hydroxyethyl amine dihydrogen phosphate, and the like.
Optionally, the nonionic antistatic agent is a nonionic antistatic agent such as polyethylene glycol ester or ether, polyol ester and acid ester, fatty acid alkanolamide, fatty acid ethoxy ether, and the like, such as polyethylene glycol oleate, polyethylene glycol stearate, polyethylene glycol methyl ether, pentaerythritol tetrastearate, stearic acid monoglyceride, span-60, span-20, octadecylamine polyoxyethylene ether, stearic acid polyoxyethylene ether, and the like.
Optionally, the zwitterionic antistatic agent is a zwitterionic antistatic agent such as quaternary ammonium carboxylic acid inner salt, imidazoline metal salt and the like.
Further, the gas conveyed into the mixing bin by the fan is nitrogen;
further, the pumping chamber utilizes gravity to convey the mixed materials.
A method for preventing blockage of a powder conveying pipeline, comprising the following steps:
s1, respectively adding an antistatic agent and powder into a mixing bin through metering, continuously conveying airflow to the mixing bin through a pipeline and a bottom valve of the mixing bin by using a fan, and fully mixing the antistatic agent and the powder to obtain a mixed material;
s2, conveying the mixed material obtained in the step S1 to a storage bin through a conveying pipeline, a flange and a screw rod;
s3, opening a valve of the storage bin, and enabling the mixed material obtained in the step S2 to enter an extraction chamber through a conveying pipeline to form a mixed material column;
s4, opening a rotary feeding valve at the bottom of the extraction chamber, and enabling the mixed material column in the extraction chamber in the step S3 to enter a mixing acceleration chamber under the action of gravity;
and S5, fully mixing the mixed material in the mixing acceleration chamber in the step S4 with the airflow from the fan, and conveying the mixed material to a using procedure bin through the airflow.
Further, the powder and the antistatic agent are added into a mixing bin in proportion, and the mixing amount of the antistatic agent is 0.5-20%, preferably 2-15%, and more preferably 5-10% of the amount of the powder.
Furthermore, the amount of the antistatic agent mixed into the powder material is different according to the types of the antistatic agent, wherein the adding proportion of the anionic antistatic agent and the cationic antistatic agent is lower than that of antistatic active compounds such as nonionic antistatic agent or zwitterionic antistatic agent.
The invention provides another method for preventing powder conveying pipelines from being blocked, which comprises the following steps:
s1, respectively metering an antistatic agent and wet powder containing a solvent into an airflow dryer, drying and airflow mixing, removing the solvent contained in the wet powder, and obtaining a dried initial mixed material;
s2, continuously conveying the mixed material obtained in the step S1 to a mixed material bin by an air flow through a pipeline and a mixed material bin valve through a fan, and mixing the mixed material by air flow again to obtain the mixed material;
s3, conveying the mixed material obtained in the step S2 to a storage bin through a conveying pipeline, a flange and a screw rod;
s4, opening a valve of the storage bin, and enabling the mixed material obtained in the step S3 to enter an extraction chamber through a conveying pipeline to form a mixed material column;
s5, opening a rotary feeding valve at the bottom of the extraction chamber, and allowing the mixed materials in the extraction chamber in the step S4 to enter a mixing acceleration chamber under the action of gravity;
and S6, fully mixing the mixed material in the mixing acceleration chamber in the step S5 with the airflow from the fan, and conveying the mixed material to a using procedure bin through a conveying pipeline and/or a bent pipe, a flange and a three-way steering valve by the airflow.
Further, the antistatic agent is added into the wet powder containing the solvent according to the proportion, the mixing amount of the antistatic agent is 0.5-20%, preferably 2-15%, and more preferably 5-10% of the amount of the powder, and the amount of the powder is calculated by the product of the amount of the wet powder containing the solvent and the solid content of the wet powder.
Furthermore, the amount of the antistatic agent mixed into the powder material is different according to the types of the antistatic agent, wherein the adding proportion of the anionic antistatic agent and the cationic antistatic agent is lower than that of antistatic active compounds such as nonionic antistatic agent or zwitterionic antistatic agent.
Further, the pneumatic drier adopts a mode of heating gas and then heating wet powder by gas for drying, the temperature of the heated gas is 40-70 ℃, and the pneumatic drying time is 1-3 hours;
the invention provides a method for preventing powder conveying pipelines from being blocked, which comprises the following steps:
s1, adding an antistatic agent into a slurry storage tank of polymer slurry or suspension by metering, and mechanically stirring the polymer slurry or the suspension in the slurry storage tank to obtain uniform mixed slurry containing the antistatic agent;
s2, separating out the solvent in the mixed slurry obtained in the step S1 through a separation program, and drying to obtain a mixed material with the antistatic agent uniformly dispersed;
s3, continuously conveying the mixed material obtained in the step S2 to a mixed material bin by an air flow through a pipeline and a mixed material bin valve by a fan to obtain the mixed material;
s4, conveying the mixed material obtained in the step S3 to a storage bin through a conveying pipeline, a flange and a screw rod;
s5, opening a valve of the storage bin, and enabling the mixture obtained in the step S4 to enter an air extraction chamber through a pipeline to form a mixture material column;
s6, opening a rotary feeding valve at the bottom of the extraction chamber, and enabling the mixed material column in the extraction chamber in the step S5 to enter a mixing acceleration chamber under the action of gravity;
and S7, fully mixing the mixed material in the mixing acceleration chamber in the step S6 with the airflow from the fan, and conveying the mixed material to a using procedure bin through a conveying pipeline and/or a bent pipe, a flange and a three-way steering valve by the airflow.
Further, the antistatic agent is added to the polymer slurry or suspension in proportion, and the mixing amount of the antistatic agent is 0.5-20%, preferably 2-15%, and more preferably 5-10% of the amount of the powder; the powder amount is calculated by the product of the polymer slurry amount and the slurry solid content.
Furthermore, the amount of the antistatic agent mixed into the powder material is different according to the types of the antistatic agent, wherein the adding proportion of the anionic antistatic agent and the cationic antistatic agent is lower than that of antistatic active compounds such as nonionic antistatic agent or zwitterionic antistatic agent.
The technical scheme of the invention has the following beneficial effects:
the anti-blocking powder pipeline conveying system and the anti-blocking powder pipeline conveying method can obviously reduce static electricity generated by friction among powder materials, between the powder materials and conveying gas and between the powder materials and a conveying pipeline in the powder conveying process, and particularly reduce static electricity aggregation of the conveying pipeline in the conveying system at a flange joint and a steering elbow, so that the frequency of blockage of the conveying pipeline in the conveying system is reduced.
Particularly, the ultra-high molecular weight polyethylene powder is thinner and lighter than other powder, has more surface area, is easier to be charged with static electricity by friction with pipelines and equipment in the conveying process, generates static accumulation, and can be easily adsorbed on the conveying pipelines and the equipment by the static accumulation, so that the blockage of a conveying system can be caused by the accumulation to a certain degree, the continuous conveying process of the powder is interrupted, and the stability of continuous production of the front and the rear processes is influenced. By adopting the anti-blocking powder pipeline conveying system and the anti-blocking powder pipeline conveying method, static electricity generated by friction between powder, between powder and conveying gas and between powder and a conveying pipeline in the conveying process of the ultra-high molecular weight polyethylene powder can be obviously reduced, and especially static electricity accumulation at the conveying pipeline, the flange joint and the steering elbow in the conveying system is reduced, so that the blockage of the powder conveying system is reduced.
The adding proportion of the antistatic agent to the conveying powder is 0.5-20 wt%, the adding amount of the antistatic agent is too small, the effect of effectively eliminating the generation and accumulation of static electricity in the conveying process cannot be achieved, and if the adding amount is too large, the content of the antistatic agent in the product is too high, and the performance of the subsequent processed product is adversely affected.
The invention discloses three methods for preventing powder conveying pipelines from being blocked, and relates to three ways of adding antistatic agents into materials, wherein one way is to directly mix the antistatic agents into the conveyed powder; one is added into wet powder containing solvent, which is convenient for mixing antistatic agent and can be evenly mixed with the conveyed powder in the drying process; the other is mixed into polymer slurry or suspension liquid, the method is directly mixed into the suspension liquid, the mixing of the antistatic agent and the powder can be realized to the maximum extent, the more uniform the mixing is, the better the antistatic effect is, the less static accumulation is generated, and the static accumulation at the conveying pipeline, the flange joint and the turning elbow in the conveying system is further effectively reduced, so that the blocking frequency of the powder conveying system is reduced.
Drawings
FIG. 1 is a schematic view of the system of the present invention
FIG. 2 is a schematic view of another system apparatus according to the present invention
In the figure: 1-a mixing bin, 2-a mixing bin valve, 3-a storage bin, 4-a storage bin bottom valve, 5-a first fan, 5' -a second fan, 6-a screw, 7-a flange, 8-an air extraction chamber, 9-a rotary feeding valve, 10-a mixing acceleration chamber, 11-a bent pipe, 12-a three-way steering valve, 13-a first use procedure bin, 14-a second use procedure bin, 15-a dust remover and 16-an airflow dryer.
Detailed Description
Embodiments of the present invention will now be further described with reference to the accompanying drawings, which are simplified schematic drawings that illustrate, by way of example only, the basic structures of the invention and, therefore, only show the structures that are relevant to the invention.
Example 1
As shown in fig. 1, octadecylamine polyoxyethylene ether as a powdery antistatic agent and powder to be conveyed are metered and respectively added into a mixing bunker 1 through rotary valves (not shown in the figure) of respective bunkers (not shown in the figure), wherein the adding amount of the octadecylamine polyoxyethylene ether is 5 wt% of the adding amount of the powder to be conveyed, an air-flow mixing first fan 5 continuously conveys air into the mixing bunker 1 through a conveying pipeline and a mixing bunker valve 2 for air-flow mixing, wherein the air conveyed into the mixing bunker 1 by the first fan 5 is high-pressure nitrogen, the powder in the mixing bunker 1 is in a boiling state in the air-flow mixing process, a mixed material with the antistatic agent uniformly dispersed is obtained after 30 minutes of mixing, the mixed material is conveyed to a storage bunker 3 through a screw 6, and the nitrogen conveyed by the air-flow mixing first fan 5 is discharged from a dust remover at the top end of the mixing bunker 1. The screw 6 is connected with the storage bin 3 by a flange 7, the valve 2 of the storage bin is opened, the mixed material enters an air extraction chamber 8 through a conveying pipeline, a stable mixed material (in the form of a mixed material column) is formed in the air extraction chamber 8, then a rotary feed valve 9 connected with the air extraction chamber 8 and a mixing acceleration chamber 10 is opened, the mixed material column in the air extraction chamber enters the mixing acceleration chamber 10 under the action of gravity, wherein the air extraction chamber 8 is connected with the mixing acceleration chamber 10 by the rotary feed valve 9, the conveying gas provided by the second fan 5 'and the mixed material are conveyed in the mixing acceleration chamber 10 to be fully mixed, and the powder added with the antistatic agent is conveyed to each use procedure bin (such as a first use procedure bin 13, a second use procedure bin) under the pushing of the air flow provided by the second fan 5' through a conveying pipeline/bent pipe 11, the flange 7 and a three-way reversing valve 12, A second use process bin 14), and nitrogen gas in the powder pipe conveying system is discharged by a dust remover 15 at the top end of the use process bin. After the powder conveying system continuously operates for 15 days, the phenomenon of material blockage of a conveying pipeline is avoided, the flange joint and the steering elbow which are easy to block are disassembled, and no obvious powder is accumulated on the inner wall of the flange joint and the steering elbow. The mechanical property of the product is not reduced by testing the produced product, which indicates that the product is not deteriorated by adding the antistatic agent.
Example 2
As shown in FIG. 2, the powdery antistatic agent sodium dodecylbenzene sulfonate and the solvent-containing ultra-high molecular weight polyethylene wet powder are metered and added into the pneumatic dryer 16, wherein the addition amount of the antistatic agent sodium dodecylbenzene sulfonate is 2 wt% of the addition amount of the solvent-containing ultra-high molecular weight polyethylene wet powder (the powder amount is calculated by the product of the solvent-containing ultra-high molecular weight polyethylene wet powder amount and the wet powder solid content). The mixture was mixed and dried in a pneumatic dryer 16 at 60 ℃ for 2 hours to remove all the solvent from the wet ultra high molecular weight polyethylene powder. After the temperature is reduced to room temperature, the mixture powder is conveyed to the mixing silo 1 through a pipeline by high-pressure gas, then, the powder is conveyed by adopting the same steps as the example 1, and finally, the powder added with the antistatic agent is conveyed to the silos of each using procedure. The detection shows that the powder conveying system runs for 20 days continuously, the phenomenon of material blockage of a conveying pipeline is avoided, the flange joint and the steering elbow which are easy to block are disassembled, and no obvious powder is accumulated on the inner wall of the powder conveying system. The mechanical property of the product is not reduced by testing the produced product, which indicates that the product is not deteriorated by adding the antistatic agent.
Example 3
The powdery antistatic agent pentaerythritol tetrastearate is metered into a slurry storage tank (not shown in the figure) of the polymerized ultra-high molecular weight polyethylene slurry or suspension, wherein the addition amount of the antistatic agent pentaerythritol tetrastearate is 3.5 wt% of the amount of the ultra-high molecular weight polyethylene powder (the amount of the ultra-high molecular weight polyethylene powder is calculated by the product of the amount of the ultra-high molecular weight polyethylene slurry and the solid content of the ultra-high molecular weight polyethylene slurry), the antistatic agent pentaerythritol tetrastearate and the polymerized ultra-high molecular weight polyethylene slurry or suspension are mechanically stirred in the slurry storage tank for 30 minutes to fully mix the antistatic agent pentaerythritol tetrastearate and the polymerized ultra-high molecular weight polyethylene slurry or suspension to obtain a mixture slurry with the antistatic agent uniformly dispersed, and the solvent in the mixture slurry is separated out through a separation step to obtain a wet mixture with the antistatic agent uniformly dispersed. Then, the procedure of example 2 was followed, and the powder was dried by an air dryer, and finally the powder to which the antistatic agent was added was transferred to each use process silo by using the powder transfer system shown in fig. 2. Through detection, the powder conveying system continuously operates for 25 days, the phenomenon of material blockage of a conveying pipeline is avoided, the flange joint and the steering elbow which are easy to block are disassembled, and no obvious powder is accumulated on the inner wall of the powder conveying system. The mechanical property of the product is not reduced by testing the produced product, which indicates that the product is not deteriorated by adding the antistatic agent.
Comparative example
Adding ultra-high molecular weight polyethylene powder into a powder storage bin to be conveyed, enabling an air flow mixing fan to enter the storage bin through a pipeline for air flow mixing and conveying, enabling air conveyed into the storage bin by the air flow mixing fan to be high-pressure nitrogen, after the air flow mixing of the air flow mixing fan for 30 minutes, opening a bottom valve of the storage bin, enabling the ultra-high molecular weight polyethylene powder to enter an air pumping chamber through the conveying pipeline, then opening a rotary feeding valve connected to the air pumping chamber, enabling a mixed material column in the air pumping chamber to enter a mixing acceleration chamber under the action of gravity, wherein the air pumping chamber is connected with the mixing acceleration chamber through the rotary feeding valve, fully mixing the mixed powder in the mixing acceleration chamber with air flow provided by the conveying fan, and finally, conveying the mixed powder to the storage bin of each use process through the conveying pipeline/bent pipe, a flange and a three-way reversing valve under the pushing of the air flow provided by the conveying fan. The conveying system continuously operates for 5 days, namely, the phenomena of material blockage of the conveying pipeline and abnormal material discharge can be caused. The detection shows that the blocking occurs at a certain flange joint, and other flange joints without blocking and the steering elbow are detached for observation, so that the ultrahigh molecular weight powder with different thicknesses is accumulated.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A system for preventing blockage of a powder delivery conduit, comprising: the device comprises a fan, a storage bin, an air extraction chamber, a mixing acceleration chamber, a three-way reversing valve and a using process bin, and is characterized in that all the components are connected through a conveying pipeline and/or a bent pipe and a flange, and the upstream of the storage bin is also provided with the mixing bin containing an antistatic agent.
2. The system for preventing the blockage of a powder conveying pipeline according to claim 1, wherein the antistatic agent is solid powder.
3. The system for preventing the blockage of powder conveying pipelines according to claim 1, wherein the antistatic agent is an antistatic active compound of an anionic antistatic agent, a cationic antistatic agent, a nonionic antistatic agent or a zwitterionic antistatic agent.
4. A method for preventing powder conveying pipelines from being blocked is characterized by comprising the following steps:
s1, respectively adding an antistatic agent and powder into a mixing bin through metering, continuously conveying airflow to the mixing bin through a pipeline and a valve of the mixing bin by using a fan, and fully mixing the antistatic agent and the powder to obtain a mixed material;
s2, conveying the mixed material obtained in the step S1 to a storage bin through a conveying pipeline, a flange and a screw rod;
s3, opening a valve of the storage bin, and enabling the mixed material obtained in the step S2 to enter an extraction chamber through a conveying pipeline to form a mixed material column;
s4, opening a rotary feeding valve at the bottom of the extraction chamber, and enabling the mixed material column in the extraction chamber in the step S3 to enter a mixing acceleration chamber under the action of gravity;
and S5, fully mixing the mixed material in the mixing acceleration chamber in the step S4 with the airflow from the fan, and conveying the mixed material to a using procedure bin through a conveying pipeline and/or a bent pipe, a flange and a three-way steering valve by the airflow.
5. A method for preventing powder conveying pipelines from being blocked is characterized by comprising the following steps:
s1, respectively metering an antistatic agent and wet powder containing a solvent into an airflow dryer, drying and airflow mixing, removing the solvent contained in the wet powder, and obtaining a dried initial mixed material;
s2, continuously conveying the mixed material obtained in the step S1 to a mixed material bin by an air flow through a pipeline and a mixed material bin valve through a fan, and mixing the mixed material by air flow again to obtain the mixed material;
s3, conveying the mixed material obtained in the step S2 to a storage bin through a conveying pipeline, a flange and a screw rod;
s4, opening a valve of the storage bin, and enabling the mixed material obtained in the step S3 to enter an extraction chamber through a conveying pipeline to form a mixed material column;
s5, opening a rotary feeding valve at the bottom of the extraction chamber, and enabling the mixed material column in the extraction chamber in the step S4 to enter a mixing acceleration chamber under the action of gravity;
and S6, fully mixing the mixed material in the mixing acceleration chamber in the step S5 with the airflow from the fan, and conveying the mixed material to a using procedure bin through a conveying pipeline and/or a bent pipe, a flange and a three-way steering valve by the airflow.
6. A method for preventing powder conveying pipelines from being blocked is characterized by comprising the following steps:
s1, adding an antistatic agent into a slurry storage tank of polymer slurry or suspension by metering, and mechanically stirring the polymer slurry or the suspension in the slurry storage tank to obtain uniform mixed slurry containing the antistatic agent;
s2, separating out the solvent in the mixed slurry obtained in the step S1 through a separation program, and drying to obtain a mixed material with the antistatic agent uniformly dispersed;
s3, continuously conveying the mixed material obtained in the step S2 to a mixed material bin by an air flow through a pipeline and a mixed material bin valve by a fan to obtain the mixed material;
s4, conveying the mixed material obtained in the step S3 to a storage bin through a conveying pipeline, a flange and a screw rod;
s5, opening a valve of the storage bin, and enabling the mixed material obtained in the step S4 to enter an extraction chamber through a conveying pipeline to form a mixed material column;
s6, opening a rotary feeding valve at the bottom of the extraction chamber, and enabling the mixed material column in the extraction chamber in the step S5 to enter a mixing acceleration chamber under the action of gravity;
and S7, fully mixing the mixed material in the mixing acceleration chamber in the step S6 with the airflow from the fan, and conveying the mixed material to a using procedure bin through a conveying pipeline and/or a bent pipe, a flange and a three-way steering valve by the airflow.
7. The method for preventing the clogging of powder conveying pipes according to any one of claims 4 to 6, wherein the powder and the antistatic agent are added to the mixing silo in a ratio.
8. The method for preventing clogging of powder conveying piping according to claim 7, wherein said antistatic agent is incorporated in an amount of 0.5 to 20% based on the amount of the powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111142494.3A CN113859985A (en) | 2021-09-28 | 2021-09-28 | System and method for preventing powder conveying pipeline from being blocked |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111142494.3A CN113859985A (en) | 2021-09-28 | 2021-09-28 | System and method for preventing powder conveying pipeline from being blocked |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113859985A true CN113859985A (en) | 2021-12-31 |
Family
ID=78991977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111142494.3A Pending CN113859985A (en) | 2021-09-28 | 2021-09-28 | System and method for preventing powder conveying pipeline from being blocked |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113859985A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05330826A (en) * | 1992-05-29 | 1993-12-14 | Tosoh Corp | Zirconia powder composition |
| JPH10118573A (en) * | 1996-10-21 | 1998-05-12 | Shin Etsu Polymer Co Ltd | Separation of synthetic resin laminated body |
| CN204281866U (en) * | 2014-12-05 | 2015-04-22 | 浙江赞宇科技股份有限公司 | The device of commercial auxiliaries is prepared in a kind of electrostatic acid |
| CN106699978A (en) * | 2015-07-24 | 2017-05-24 | 中国石化扬子石油化工有限公司 | Method for producing ethylene copolymerized polypropylene through propylene bulk gas phase combination technology |
| CN110559897A (en) * | 2019-09-30 | 2019-12-13 | 厦门金达威生物科技有限公司 | Centrifugal spray drying system with independent anti-caking agent adding device |
| CN210544461U (en) * | 2019-07-25 | 2020-05-19 | 如皋市雨润纤维科技有限公司 | Antistatic agent injection device |
| CN213170358U (en) * | 2020-09-24 | 2021-05-11 | 镇江市瑞政电力工程有限公司 | Pneumatic material conveying device |
| CN113164892A (en) * | 2018-11-26 | 2021-07-23 | 株式会社金星 | Gas-conveying type method and system for quantitatively supplying fine powder |
| CN214020527U (en) * | 2020-11-16 | 2021-08-24 | 苏州科曼纺织科技有限公司 | Injection device that antistatic agent was used |
-
2021
- 2021-09-28 CN CN202111142494.3A patent/CN113859985A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05330826A (en) * | 1992-05-29 | 1993-12-14 | Tosoh Corp | Zirconia powder composition |
| JPH10118573A (en) * | 1996-10-21 | 1998-05-12 | Shin Etsu Polymer Co Ltd | Separation of synthetic resin laminated body |
| CN204281866U (en) * | 2014-12-05 | 2015-04-22 | 浙江赞宇科技股份有限公司 | The device of commercial auxiliaries is prepared in a kind of electrostatic acid |
| CN106699978A (en) * | 2015-07-24 | 2017-05-24 | 中国石化扬子石油化工有限公司 | Method for producing ethylene copolymerized polypropylene through propylene bulk gas phase combination technology |
| CN113164892A (en) * | 2018-11-26 | 2021-07-23 | 株式会社金星 | Gas-conveying type method and system for quantitatively supplying fine powder |
| CN210544461U (en) * | 2019-07-25 | 2020-05-19 | 如皋市雨润纤维科技有限公司 | Antistatic agent injection device |
| CN110559897A (en) * | 2019-09-30 | 2019-12-13 | 厦门金达威生物科技有限公司 | Centrifugal spray drying system with independent anti-caking agent adding device |
| CN213170358U (en) * | 2020-09-24 | 2021-05-11 | 镇江市瑞政电力工程有限公司 | Pneumatic material conveying device |
| CN214020527U (en) * | 2020-11-16 | 2021-08-24 | 苏州科曼纺织科技有限公司 | Injection device that antistatic agent was used |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6786681B2 (en) | Method and apparatus for the pneumatic conveying of fine bulk material | |
| CN100567104C (en) | Take into account the pneumatic conveyer of powder and pellet | |
| US20220388790A1 (en) | Solids trans-loading | |
| CN103754597B (en) | The dedusting delivery system of loose unpacked material and carrying method | |
| CN103388046A (en) | Pneumatic transmission method for dry dedusting of fine ash in converter gas | |
| CN108147134A (en) | A kind of light Jie flows air-transport system altogether | |
| CN113859985A (en) | System and method for preventing powder conveying pipeline from being blocked | |
| CN203428455U (en) | Pneumatic fine ash conveying system for converter gas dry dedusting | |
| EP3781298B1 (en) | Method for transporting polyolefin particles in a polymer conveying system | |
| CN219669514U (en) | Pneumatic conveying device | |
| CN208980594U (en) | A kind of lime device with Pneumatic power back-blowing equipment | |
| CN107043024A (en) | A kind of polyvinyl chloride resin powder delivery system | |
| Bodkhe et al. | Design, Analysis & Fabrication of Pneumatic Material Handling System | |
| CN211733142U (en) | Coal fired boiler flue gas denitration loading attachment | |
| US4342797A (en) | Wet flow characteristic of coal and other water-insoluble solid particles | |
| Tomita et al. | Feed rate characteristics of a blow tank solids conveyor in transport of granular material | |
| CN220519508U (en) | Horizontal material receiving device | |
| CN110621657B (en) | Method for the gas stream transport of methionine | |
| CN211812319U (en) | Fly ash conveying system suitable for multiple electric fields | |
| CN205098764U (en) | Powder transport tank car | |
| CN214988720U (en) | Material suction device for preventing material from settling | |
| CN111087183B (en) | Lime device with pneumatic back blowing equipment | |
| CN110155725B (en) | Dense phase pneumatic conveying device for controlling material bolt formation | |
| CN203922126U (en) | A kind ofly unload ash and pneumatic ash conveying plant for mobile monomer dust collector ash hopper on the groove of ore deposit | |
| JP2619790B2 (en) | Method of transporting adhesive powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211231 |
|
| RJ01 | Rejection of invention patent application after publication |