CN114768686A - Closed feeding system for DOTP synthesis - Google Patents
Closed feeding system for DOTP synthesis Download PDFInfo
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- CN114768686A CN114768686A CN202210545234.9A CN202210545234A CN114768686A CN 114768686 A CN114768686 A CN 114768686A CN 202210545234 A CN202210545234 A CN 202210545234A CN 114768686 A CN114768686 A CN 114768686A
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- pipe
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- BJAJDJDODCWPNS-UHFFFAOYSA-N dotp Chemical compound O=C1N2CCOC2=NC2=C1SC=C2 BJAJDJDODCWPNS-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 15
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 15
- 238000007664 blowing Methods 0.000 claims abstract description 34
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000005886 esterification reaction Methods 0.000 claims abstract description 19
- 230000032050 esterification Effects 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims description 17
- 239000000428 dust Substances 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 56
- 239000000843 powder Substances 0.000 abstract description 35
- 230000035484 reaction time Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 16
- 229920000728 polyester Polymers 0.000 description 11
- 239000002699 waste material Substances 0.000 description 8
- 238000010009 beating Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 241000282326 Felis catus Species 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000006837 decompression Effects 0.000 description 2
- OEIWPNWSDYFMIL-UHFFFAOYSA-N dioctyl benzene-1,4-dicarboxylate Chemical compound CCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCC)C=C1 OEIWPNWSDYFMIL-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 150000002148 esters Chemical group 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- BWDBEAQIHAEVLV-UHFFFAOYSA-N 6-methylheptan-1-ol Chemical compound CC(C)CCCCCO BWDBEAQIHAEVLV-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
-
- 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
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/06—Gas pressure systems operating without fluidisation of the materials
-
- 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
-
- 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
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/18—Preventing escape of dust
- B65G69/181—Preventing escape of dust by means of sealed systems
- B65G69/182—Preventing escape of dust by means of sealed systems with aspiration means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
The invention discloses a closed feeding system for DOTP synthesis, and relates to a material conveying system, which comprises a DOTP esterification kettle, and is characterized by further comprising: the feeding kettle is connected with the esterification kettle in a closed manner; the PET stock bin is connected with the feeding kettle in a closed manner; and the air compressor is connected with the PET stock bin in a closed manner. The invention is provided with the PET material bin and the air compressor, realizes the purpose of closed feeding of PET powder, is additionally provided with the feeding kettle, realizes the purpose of pre-dissolving and preheating octanol and the PET powder, shortens the esterification reaction time, improves the esterification efficiency and increases the productivity; the PET storage bin is provided with the conical sealing head, so that the material storage phenomenon of the PET storage bin is solved, and the complete and clean feeding of the PET storage bin is realized; the PET storage bin is provided with the air blowing pipe group and the air blowing branch pipe, so that the flow speed in the PET storage bin is increased, and the feeding speed is accelerated.
Description
Technical Field
The invention relates to a material conveying system, in particular to a closed feeding system for DOTP synthesis.
Background
The environment-friendly plasticizer dioctyl terephthalate DOTP is synthesized by ester exchange of waste PET polyester and octanol, and is of great benefit to environmental protection, resource saving and sustainable development.
In the prior art, the process of feeding raw materials to a DOTP esterification kettle is as follows: respectively adding measured waste PET polyester powder and octanol into the esterification kettle, wherein the waste PET polyester powder is added through a manhole of the esterification kettle. It has the problems that: 1) the esterification reaction time is long; 2) the material is thrown from the manhole of the feeding kettle, which can cause the generation of volatile matters of dust and octanol, and the environment-friendly effect is poor.
The prior patent I: the patent publication No. CN111889059A discloses a reaction device and a process for preparing DOTP, and discloses a reaction device and a process for preparing DOTP, wherein the reaction device comprises a reaction kettle and a submerged jet bypass, the reaction kettle is provided with an external circulation pipeline, and the external circulation pipeline is provided with a circulating pump, a throttling element and a heater, but according to the disclosed technical scheme, the closed feeding of PET raw materials cannot be realized.
The prior patent II: the patent name of the publication No. CN202784858U for granted is an energy-saving vacuum suction machine, which discloses a vacuum pump, a dust removal tank, a storage tank and a storage bin, but according to the disclosed technical scheme, the material storage phenomenon during feeding of PET powder cannot be solved.
Disclosure of Invention
The invention provides a closed feeding system for DOTP synthesis, which shortens the single batch working time of an esterification kettle, increases the productivity, realizes the purpose of closed feeding, avoids the emission of smell and dust, and solves the material storage phenomenon during feeding of PET powder.
The invention specifically adopts the technical scheme that:
a closed feeding system for DOTP synthesis comprises a DOTP esterification kettle and is characterized by also comprising;
the feeding kettle is provided with a heating device and is hermetically connected with the esterification kettle;
the PET storage bin and the octanol storage tank are respectively connected with the feeding kettle in a sealing way;
and the air compressor is connected with the PET stock bin in a closed manner.
The heating device can adopt the prior art, such as: sandwich, coil, etc.
In the scheme, 1) octanol is directly fed into the feeding kettle, PET powder is firstly fed into a PET bin, air is blown into the PET bin through an air compressor to increase the air pressure in the PET bin, the PET powder is blown out of the PET bin into the feeding kettle in a high-pressure environment, the PET powder is conveyed to the feeding kettle in a sealed manner in the PET bin, and the octanol and the PET powder are mixed in the feeding kettle, so that the purpose of sealed feeding of the PET powder is realized, and the emission of smell and dust is avoided; 2) the feeding kettle is provided with a heating device, the feeding kettle can be heated by utilizing the waste heat in the DOTP synthesis device, and PET raw materials and octanol are pre-dissolved and heated in the feeding kettle and then are conveyed into the esterification kettle, so that the single-batch working time of the esterification kettle is shortened, and the capacity is increased; 3) DOTP esterifies the cauldron and need not to throw material and use the manhole, only set up the clearance hole can, save the cauldron manufacturing cost that esterifies.
The feeding device comprises a feeding kettle, a feeding pipe, a conical seal head and a feeding pipe, wherein the feeding port is arranged at the upper part of the PET bin, the conical seal head is arranged at the lower part of the PET bin, one end of the feeding pipe is connected to the upper part of the feeding kettle, the other end of the feeding pipe extends into the conical seal head, and the included angle of the conical seal head is larger than or equal to 50 degrees.
According to the process requirement, the median particle size of the PET polyester powder is 1-3mm, the applicant finds that the fluidity of the PET polyester powder is extremely poor under the particle size, and according to repeated verification of the applicant, if the included angle of the conical end socket is less than 50 degrees, the fluidity of the PET powder in the conical end socket is reduced, the feeding speed of the material is influenced, and the complete feeding of the material in the conical end socket is difficult to ensure, so that the material is stored in the conical end socket.
The PET polyester powder is easy to accumulate due to adsorption and electrostatic action so as to reduce the fluidity, and therefore, the more preferable scheme is as follows:
an air blowing pipe is arranged in the PET storage bin and connected with the air compressor; furthermore, a plurality of groups of blowing pipe groups are uniformly arranged on the blowing pipes; each blowing pipe group is provided with 3 downward branch pipes, the gas outlets of the branch pipes blow downwards to the inner wall of the conical end enclosure, so that the flow of powder in the conical end enclosure is accelerated, the included angle between the branch pipes is set to be 45 degrees, the coverage of the blowing surface in the conical end enclosure is ensured, the problem that a blind area exists in the conical end enclosure is avoided, and the problem that the flowability of PET polyester powder is poor and the problem of material collection on the inner wall of the conical end enclosure is avoided; the PET powder is thoroughly beaten in the PET feed bin, the measurement of the PET powder of also being convenient for, the ratio of control PET powder and octanol improves the efficiency of esterifying, avoids the waste of material.
In order to increase the feeding flow of the feeding pipe, the preferred scheme is that a discharging cover is arranged in the PET storage bin, the discharging cover is connected with the feeding pipe, and the feeding area of PET powder can be increased.
Preferably, the opening of the discharging cover faces downwards, the distance between the discharging cover and the bottom of the conical end enclosure is L, and L is more than or equal to 50mm and less than or equal to 100 mm. According to the test of the applicant, when the distance L between the discharging cover and the bottom of the conical end socket is not less than 50mm and not more than 100mm, the discharging speed of the PET powder is the fastest, the discharging in a PET bin can be completed fastest, and the working efficiency is improved; the distance of ejection of compact cover is located this interval in, also can realize beating in the PET feed bin clean.
In order to avoid the blockage of the material in the discharge pipe on the pipeline, the preferred scheme is that the blowing assisting pipe is connected on the feed pipe, the blowing assisting pipe is connected with the air outlet pipe of the air compressor, and high-pressure gas is blown into the feed pipe by the blowing assisting pipe, so that the effect of dredging the feed pipe is achieved, the gas flow rate in the feed pipe is increased, the material flow in the feed pipe is improved, and the material conveying speed is accelerated.
Preferably, the device further comprises a bag-type dust collector and a vacuumizing machine, wherein the air inlet of the bag-type dust collector is connected with the feeding kettle in a sealing manner, and the air outlet of the bag-type dust collector is connected with the vacuumizing machine.
The sack cleaner is arranged in detaching the dust of throwing the material cauldron and taking out in the gas, and waste gas reduces the emission of pollutant in the exhaust gas collecting tank through the evacuation pump suction, has played the environmental protection effect, has guaranteed the negative pressure environment in the material cauldron of throwing simultaneously, realizes the feeding that lasts of PET powder.
Preferably, the air compressor machine with be equipped with the gas holder between the PET feed bin for high-pressure gas's storage has guaranteed the stable air supply of feeding system.
Compared with the prior art, the invention has the beneficial effects that:
(1) set up PET feed bin and air compressor machine, realized the purpose of PET powder closed feeding, add and throw the material cauldron, realized octanol and PET powder pre-dissolved purpose of preheating, shorten esterification reaction time, improve esterification efficiency, increase the productivity.
(2) The PET feed bin sets up the toper head contained angle and is more than or equal to 50, and sets up the ejection of compact cover and is less than or equal to L with the distance of toper head bottom 50mm and is less than or equal to 100mm, has improved the ejection of compact speed of PET feed bin, has solved the stock phenomenon of PET feed bin, has realized the thorough clean feeding of PET feed bin.
(3) The PET feed bin is provided with the blowing pipe group and the blowing branch pipe, so that the blowing area in the PET feed bin is increased, dead-angle material storage in the PET feed bin is avoided, and the cleanness of the discharge of the PET feed bin is ensured.
Drawings
FIG. 1 is a schematic structural view of a closed feeding system for DOTP synthesis according to the present invention;
FIG. 2 is a schematic view of the construction of the inflation tube set of the present invention;
fig. 3 is a schematic view of the installation structure of the ladder and the guardrail.
In the figure: 1 inlet pipe, 2 throw the material cauldron inlet valve, 3 throw the material cauldron pan feeding mouth, 4 throw the material cauldron, 5 feed bin covers, 6 dog-house, 7PET feed bin, 8 gas blow pipes, 9 help the blow valve, 10 first manometer, 11 admission valves, 12 second manometer, 13 intake pipes, 14 supports, 15 bleeder valves, 16 ejection of compact covers, 17 tapered head, 18 help the blowpipe, 19 relief pressure valves, 20 gas holders, 21 air compressors, 22 guardrails, 23 cat ladder, 24 evacuation machines, 25 strap dust collectors, 26 the cauldron of esterifying.
81 air blowing pipe group and 82 air nozzle.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in fig. 1, the air outlet of the air compressor 21 is connected with the air inlet of the air storage tank 20, the air outlet of the air storage tank 20 is connected with the air inlet of the PET stock bin 7, the discharge port of the PET stock bin 7 is connected with the feed port of the feeding kettle 4, the discharge port of the feeding kettle 4 is connected with the feed port of the esterification kettle 26, the air outlet of the feeding kettle 4 is connected with the air inlet of the bag-type dust collector 25, and the air outlet of the bag-type dust collector 25 is connected with the air inlet of the vacuum extractor 24.
The air outlet of the air compressor 21 is connected with the air inlet of the air storage tank 20 through a pipeline, and an air outlet valve is arranged on a connecting pipe of the air outlet of the air compressor 21 and used for controlling the flow of the air entering the air storage tank 20. An air outlet of the air storage tank 20 is connected with an air inlet of the PET bin 7 through an air inlet pipe 13, and an air outlet valve is arranged on the air inlet pipe 13 at the air outlet of the air storage tank 20 and used for controlling the air outlet flow of the air storage tank 20; be equipped with relief pressure valve 19 on the intake pipe 13, be equipped with admission valve 11 on the intake pipe 13 of relief pressure valve 19 rear end, both ends are equipped with second manometer 12 and first manometer 10 respectively around admission valve 11, and second manometer 12 is used for monitoring the gas pressure after the decompression of relief pressure valve 19, and first manometer 10 is used for monitoring the pressure in the intake pipe 13 before getting into PET feed bin 7. The gas outlet of the vacuum extractor 24 is connected with a waste gas recovery tank, and the waste gas pumped out by the feeding kettle 4 is treated in a centralized way, so that the environment is protected, and the pollution of the waste gas to the environment is avoided.
PET feed bin 7 with throw and be connected with inlet pipe 1 between the material cauldron 4, the feed inlet of inlet pipe 1 is connected with ejection of compact cover 16, ejection of compact cover 16 has increaseed inhaling when the PET powder ejection of compact and expects the area for the speed of the ejection of compact.
The bottom of the PET storage bin 7 is provided with a conical seal head 17, the discharging cover 16 is arranged right below the conical seal head 17, waste PET polyester is ground into powder with the diameter of 1-3mm, the flowability of the PET powder is extremely poor, the powder in the PET storage bin 7 is difficult to completely convey, the PET storage bin 7 is of a vertical structure, the phenomenon of material storage does not exist, the position of the material storage is mainly concentrated at the position of the conical seal head 17, in order to ensure thorough material beating each time and ensure the feeding ratio of DOTP generated by the reaction of the waste PET polyester and isooctanol, besides the included angle of the conical seal head 17 being more than or equal to 50 degrees, the number of the blowing pipe groups 81 is increased to be 24, the flow rate of the powder in the conical seal head 17 is accelerated, and the conveying of the powder is accelerated. Because the body of PET feed bin 7 is vertical structure, do not have the material storage phenomenon, the position of material storage is mainly concentrated on toper head 17 position, and ejection of compact cover 16 opening down more is favorable to the powder ejection of compact in the toper head 17, and the distance between ejection of compact cover 16 and the toper head 17 bottom is in 50mm be less than or equal to L be less than or equal to 100mm to the ejection of compact speed is the fastest in this PET feed bin, and the material ejection of compact in the toper head 17 is clean, solves the material storage phenomenon.
The blowing assisting pipe 18 is connected between an air inlet pipe 13 at the rear end of the pressure reducing valve 19 and the feeding pipe 1, the blowing assisting pipe 18 is connected with the blowing assisting valve 9, when the feeding kettle 4 is used for beating materials and feeding materials, the flow speed in the feeding pipe 1 can be adjusted by controlling the on-off of the blowing assisting valve 9, when the blowing assisting valve 9 is opened, the flow speed in the feeding pipe 1 is increased, the feeding of PET powder is accelerated, and the flow is increased.
Throw and be equipped with on the material cauldron 4 and throw material cauldron pan feeding mouth 3, PET feed bin 7 with throw material cauldron pan feeding mouth 3 and be connected through inlet pipe 1, inlet pipe 1 closes on one side of PET feed bin 7 and is connected with bleeder valve 15, one side that inlet pipe 1 closes on to throw material cauldron 4 is connected with throws material cauldron inlet valve 2, bleeder valve 15 is used for controlling the discharge flow of PET feed bin 7, throws material cauldron inlet valve 2 and is used for preventing to throw the material refluence in the material cauldron 4.
Throw and be equipped with the puddler in the material cauldron 4, the upper end of throwing material cauldron 4 is equipped with driving motor, and driving motor is connected with the puddler, and driving motor drives the rotation of puddler, is equipped with stirring vane on the puddler for dissolve in advance of octanol and PET powder.
Be equipped with dog-house 6 on the PET feed bin 7, be equipped with feed bin lid 5 on the dog-house 6, when 7 feeds in the PET feed bin, open feed bin lid 5, through travelling bogie transported substance material to feed bin department, in 6 throw in the material with the dog-house and send PET feed bin 7, throw the material and accomplish the back, close feed bin lid 5, when having avoided the dnockout feeding, the material dust is outside 6 effluvium PET feed bin 7 of dog-house, the polluted environment.
As shown in fig. 2, intake pipe 13 gos deep into the feed bin in and is connected with gas blow pipe 8, be connected with a plurality of align to grid's the nest of tubes 81 of blowing on the gas blow pipe 8, it blows the branch pipe to be equipped with on the nest of tubes 81 to blow, it all communicates with gas blow pipe 8 to blow the branch pipe, the end-to-end connection who blows the branch pipe has gas shower nozzle 82, a material to in the PET feed bin 7 blows off, the quantity that blows the branch pipe in this embodiment is established to 3, and the contained angle is 45, avoid the tapered head 17 to have the blind area scheduling problem, prevent that the material from piling up, the feeding of being convenient for. The gas nozzle 82 is arranged above the discharging cover 16, so that the materials in the close range of the discharging cover 16 can be blown away conveniently, and the discharging of the discharging cover 16 is facilitated.
As shown in fig. 3, a support 14 is fixed to the PET magazine 7 for supporting the PET magazine 7 and facilitating the installation of the tapping pipe 1. PET feed bin 7's lateral surface is equipped with cat ladder 23, and PET feed bin 7's upper end is equipped with guardrail 22, and cat ladder 23 and guardrail 22 fixed connection set up cat ladder 23 and guardrail 22, and the PET feed bin 7 of being convenient for throw material and overhaul, the equipment maintenance in the later stage of being convenient for.
The process of synthesizing environment-friendly plasticizer dioctyl terephthalate DOTP by ester exchange of waste PET polyester and octanol comprises the following steps:
(1) after being crushed by a crusher in a crushing workshop, the waste PET polyester is put into a PET bin 7 through a feeding port 6;
(2) the outlet pressure of an air compressor 21 in the production workshop is set to be 0.7MPa, and the air enters an air storage tank 20 and is decompressed to 0.2MPa by a decompression valve 19;
(3) in the material beating process, the second pressure gauge 12 is adjusted to be 0.2MPa, the air inlet valve 11 is opened, air enters the air blowing pipe 8 in the PET storage bin 7 through the air blowing pipe 13 and is blown into the storage bin through the air blowing pipe 8 → the air blowing pipe group 81 → the air nozzle 82, the air and PET materials pass through the discharging cover 16 → the feeding pipe 1 → the feeding kettle inlet valve 2 → the feeding kettle 4, and the air in the feeding kettle 4 passes through the cloth bag type dust collector 25 → the vacuumizing machine 24 and is discharged out of the device;
(4) octanol and PET powder are pre-dissolved and preheated in a feeding kettle, and then are conveyed into an esterification kettle 26;
(5) during the material beating period, the blowing-assisting valve 9 is opened to ensure the smoothness of the feeding pipe 1;
(6) after the material beating is finished, the air inlet valve 11 and the blowing assisting valve 9 are closed in sequence, when the pressure of the pressure gauge 10 is 0MPa, the discharge valve 15 is closed again, and the next time the PET storage bin 7 is loaded, the storage bin cover 5 is opened on the safe premise to load materials.
Claims (8)
1. The utility model provides a synthetic closed feeding system of using of DOTP, includes DOTP esterification kettle, characterized by still includes:
the feeding kettle is provided with a heating device and is connected with the esterification kettle in a sealing manner;
the PET storage bin and the octanol storage tank are respectively connected with the feeding kettle in a closed manner;
the air compressor machine, the air compressor machine with the PET feed bin closed is connected.
2. The closed feeding system for DOTP synthesis as set forth in claim 1, wherein a feeding port is arranged at the upper part of the PET bin, and a conical end enclosure is arranged at the lower part;
a feeding pipe is arranged between the PET storage bin and the feeding kettle, one end of the feeding pipe is connected to the upper part of the feeding kettle, and the other end of the feeding pipe extends into the conical sealing head;
the included angle of the conical end socket is more than or equal to 50 degrees.
3. The closed feeding system for DOTP synthesis as set forth in claim 2, wherein a discharging cover is arranged in the PET bin, and the discharging cover is connected with the feeding pipe;
the opening of the discharging cover faces downwards, the distance between the discharging cover and the bottom of the conical end socket is L, and L is more than or equal to 50mm and less than or equal to 100 mm.
4. The closed feeding system for DOTP synthesis as recited in claim 2, wherein the feeding pipe is connected with an auxiliary blowing pipe, and the auxiliary blowing pipe is connected with an air outlet pipe of the air compressor.
5. The closed feeding system for DOTP synthesis as recited in claim 1, wherein an air blowing pipe is arranged in the PET storage bin and connected with the air compressor; and the blowing pipe is provided with a blowing pipe group, and the plurality of blowing pipe groups are uniformly arranged on the blowing pipe.
6. A closed feeding system for DOTP synthesis as defined in claim 5, wherein said blowing tube set is provided with 3 downward branch tubes, and an angle between the branch tubes is set to 45 °.
7. The closed feeding system for DOTP synthesis as recited in claim 1, further comprising a bag-type dust collector and a vacuumizer, wherein an air inlet of the bag-type dust collector is hermetically connected with the feeding kettle, and an air outlet of the bag-type dust collector is connected with the vacuumizer.
8. The closed feeding system for DOTP synthesis as set forth in claim 1, wherein a gas storage tank is disposed between the air compressor and the PET bin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210545234.9A CN114768686A (en) | 2022-05-19 | 2022-05-19 | Closed feeding system for DOTP synthesis |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210545234.9A CN114768686A (en) | 2022-05-19 | 2022-05-19 | Closed feeding system for DOTP synthesis |
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| WO2015139527A1 (en) * | 2014-03-17 | 2015-09-24 | 江苏华东锂电技术研究院有限公司 | Device for continuously preparing lithium iron phosphate |
| CN206996598U (en) * | 2017-07-27 | 2018-02-13 | 浙江弘博新材料科技有限公司 | Produce the controllable temperature reactor of DOTP |
| CN207520955U (en) * | 2017-08-14 | 2018-06-22 | 镇江市高等专科学校 | A kind of powder mix conveying appliance |
| CN107628638A (en) * | 2017-09-30 | 2018-01-26 | 浙江兜兰智能设备股份有限公司 | A kind of four basic lead sulphate productions prepare after-treatment system |
| CN108499490A (en) * | 2018-04-10 | 2018-09-07 | 广东金宝力化工科技装备股份有限公司 | A kind of polyurethane coating production line |
| CN212639194U (en) * | 2020-06-08 | 2021-03-02 | 浙江建业化工股份有限公司 | Feeding system for shortening production period of plasticizer phthalate |
| CN212610462U (en) * | 2020-08-14 | 2021-02-26 | 上海电气集团国控环球工程有限公司 | High-temperature dust removal device for raw coke oven gas |
| CN112919510A (en) * | 2021-01-25 | 2021-06-08 | 泰安渤洋化工科技有限公司 | Novel calcining system for hydrotalcite |
| CN113651111A (en) * | 2021-07-20 | 2021-11-16 | 江苏嘉通能源有限公司 | PTA powder high-temperature closed pipeline integrated feeding equipment and feeding process |
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