CN113798279A - Method and device for removing carbon deposition in quencher of hexafluoropropylene reaction equipment - Google Patents
Method and device for removing carbon deposition in quencher of hexafluoropropylene reaction equipment Download PDFInfo
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- CN113798279A CN113798279A CN202111008436.1A CN202111008436A CN113798279A CN 113798279 A CN113798279 A CN 113798279A CN 202111008436 A CN202111008436 A CN 202111008436A CN 113798279 A CN113798279 A CN 113798279A
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- quencher
- hexafluoropropylene
- ultrasonic vibration
- ultrasonic probe
- vibration devices
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 44
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 33
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 21
- 230000008021 deposition Effects 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000000523 sample Substances 0.000 claims abstract description 42
- 239000000428 dust Substances 0.000 claims abstract description 12
- 238000010791 quenching Methods 0.000 claims description 7
- 239000004071 soot Substances 0.000 claims 2
- 238000001338 self-assembly Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 7
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- 239000004341 Octafluorocyclobutane Substances 0.000 description 4
- 239000006227 byproduct Substances 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- BCCOBQSFUDVTJQ-UHFFFAOYSA-N octafluorocyclobutane Chemical compound FC1(F)C(F)(F)C(F)(F)C1(F)F BCCOBQSFUDVTJQ-UHFFFAOYSA-N 0.000 description 4
- 235000019407 octafluorocyclobutane Nutrition 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- -1 hexafluoropropylene, tetrafluoroethylene Chemical group 0.000 description 2
- 239000000543 intermediate Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 238000004227 thermal cracking Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- DAFIBNSJXIGBQB-UHFFFAOYSA-N perfluoroisobutene Chemical group FC(F)=C(C(F)(F)F)C(F)(F)F DAFIBNSJXIGBQB-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
- B08B7/026—Using sound waves
- B08B7/028—Using ultrasounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/26—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton
- C07C17/263—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton by condensation reactions
- C07C17/269—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton by condensation reactions of only halogenated hydrocarbons
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses a device for removing carbon deposition in a quencher of hexafluoropropylene reaction equipment, wherein upper control ends (1) of a plurality of upper ultrasonic vibration devices (14) are connected with an upper controller (2), a plurality of upper ultrasonic vibration devices (14) are uniformly arranged on the outer surface of a top cover (4) of the quencher (3), lower control ends (5) of a plurality of lower ultrasonic vibration devices (15) are connected with a lower controller (6), and a plurality of lower ultrasonic vibration devices (15) are uniformly arranged on the outer surface of a bottom cover (7) of the quencher (3). The invention provides a method for removing carbon deposition in a quencher, which can prevent carbon powder on the pipe wall of a vertical pipe (8) of the quencher (3) from being adsorbed by the carbon powder emitted by an upper ultrasonic probe (10) and a lower ultrasonic probe (12) so as to uniformly collect the fallen self-polymerized carbon powder into a dust collector (9) and realize the continuous operation of the system flow of hexafluoropropylene reaction equipment.
Description
Technical Field
The invention belongs to the technical field of organic fluorine chemical production, and particularly relates to a method and a device for removing carbon deposition in a quencher of hexafluoropropylene reaction equipment.
Background
Hexafluoropropylene (HFP) in English name, CF3CFCF2Is one of the basic raw materials of organic fluorine industry, is of secondary importance to tetrafluoroethylene, and is a copolymerization unit of a plurality of fluorine-containing copolymersThe intermediates are also intermediates for a variety of fluorine-containing compounds. The preparation method of the hexafluoropropylene has more ways, the tetrafluoroethylene thermal cracking route is widely adopted for producing the hexafluoropropylene in industrialization, and the hexafluoropropylene has the advantages of simple process and higher product purity. The technical process and the principle of producing the hexafluoropropylene by the thermal cracking of the tetrafluoroethylene are as follows: tetrafluoroethylene and octafluorocyclobutane (by-products generated by cracking tetrafluoroethylene) are preheated according to a certain proportion and then enter a tubular reactor to be cracked and converted into crude cracked gas, wherein the main components of the crude cracked gas are hexafluoropropylene, tetrafluoroethylene, octafluorocyclobutane and a small amount of other gas-phase by-products, and a certain amount of solid-phase carbon powder is generated at the same time. And (3) quenching and cooling the crude cracked gas, then removing carbon powder in a carbon powder filter, and then performing subsequent processes to obtain a finished product of hexafluoropropylene. But still have the carbon powder to adsorb on the quencher, if not clear up the carbon deposit for a long time on present quencher, the heat exchange tube is blocked up very easily to the carbon powder of gathering to reduce the interior gaseous phase velocity of flow of reaction equipment, increased reaction residence time, thereby influence the efficiency and the selectivity of reaction, but dismantle the quencher and clear up, so not only can cause the work load to increase, and the octafluoro isobutylene that produces in the quencher can produce the hypertoxic, causes the risk of overhauing and risees.
Disclosure of Invention
The invention provides a method and a device for removing carbon deposition in a quencher of hexafluoropropylene reaction equipment, which can simply, conveniently and quickly remove the carbon deposition in the quencher of the hexafluoropropylene reaction equipment and improve the cleaning safety, thereby ensuring the normal operation of a reactor for preparing hexafluoropropylene.
The invention adopts the following technical scheme: a device for removing carbon deposition in a quencher of hexafluoropropylene reaction equipment comprises an upper vibration assembly and a lower vibration assembly, wherein the upper vibration assembly mainly comprises a plurality of upper ultrasonic vibration devices, the upper control ends of the upper ultrasonic vibration devices are connected with an upper controller, the upper ultrasonic vibration devices are uniformly arranged on the outer surface of a top cover of the quencher, the upper ultrasonic vibration devices surround the top cover of the quencher, the lower vibration assembly mainly comprises a plurality of lower ultrasonic vibration devices, the lower control ends of the lower ultrasonic vibration devices are connected with a lower controller, the lower ultrasonic vibration devices are uniformly arranged on the outer surface of a bottom cover of the quencher, the lower ultrasonic vibration devices surround the bottom cover of the quencher, a vertical pipe of the quencher is arranged between the top cover and the bottom cover, and each upper ultrasonic vibration device corresponds to each lower ultrasonic vibration device, and a dust collector is arranged at the bottom of the quencher.
The upper vibration assembly mainly comprises six upper ultrasonic vibration devices which are uniformly arranged on the outer surface of the top cover of the quencher. Each upper ultrasonic vibration device is provided with an upper ultrasonic probe, one end of the upper ultrasonic probe is connected with the outer surface of a top cover of the quencher through an upper connecting piece, the other end of the upper ultrasonic probe is an upper control end, and the upper ultrasonic probe is connected with an upper controller through the upper control end. The upper connecting piece is arranged as a tube plate flange. The upper controller is set as a PLC controller.
The lower vibration assembly mainly comprises six lower ultrasonic vibration devices which are uniformly arranged on the outer surface of the bottom cover of the quencher. Each lower ultrasonic vibration device is provided with a lower ultrasonic probe, one end of the lower ultrasonic probe is connected with the outer surface of a bottom cover of the quencher through a lower connecting piece, the other end of the lower ultrasonic probe is a lower control end, and the lower ultrasonic probe is connected with a lower controller through the lower control end. The lower connecting piece is arranged as a tube plate flange. The lower controller of the invention is set as a PLC controller.
The invention provides a method for removing carbon deposition in a quencher of hexafluoropropylene reaction equipment, which comprises the steps that an upper ultrasonic probe and a lower ultrasonic probe which are distributed at the upper part and the lower part of the quencher send ultrasonic signals, carbon powder gathered on the pipe wall of a vertical pipe of the quencher cannot be adsorbed on the surface of the vertical pipe of the quencher through vibration generated by the ultrasonic signals sent by the upper ultrasonic probe and the lower ultrasonic probe, so that self-polymerized carbon powder falling off from the pipe wall of the vertical pipe of the quencher is uniformly collected into a dust collector, and the continuous operation of the system flow of the hexafluoropropylene reaction equipment is realized.
The invention has the following beneficial effects: after the technical scheme is adopted, the ultrasonic vibration is generated to vibrate the carbon powder on the pipe wall of the vertical pipe of the quencher, so that the carbon powder gathered on the pipe wall of the vertical pipe of the quencher cannot be adsorbed on the surface of the vertical pipe of the quencher, the quenching heat exchange effect is prevented from being influenced, the self-polymerized carbon powder subjected to the ultrasonic vibration is uniformly collected to the dust collector, and the dust collector is used for standby and is cleaned regularly, so that the continuous operation of the flow of a reaction system of the device can be realized, the operation is simple, convenient and quick, the carbon deposition on the quencher of hexafluoropropylene reaction equipment can be removed, the cleaning safety is improved, the manpower and material resources are saved, the material loss is low, and the normal operation of the hexafluoropropylene preparation reactor is ensured. The invention can reduce the operation flow of removing the carbon powder to the maximum extent, the risk is in direct proportion to the operation frequency, the existence amount of the risk can be reduced by reducing the operation frequency, and the invention is suitable for the long-period stable operation of the device. Secondly, the frequency of removing carbon powder is reduced, namely the annual production time is increased by 264 hours, about 200 tons of hexafluoropropylene can be increased according to the design productivity, and the device benefit is improved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a distribution diagram of an ultrasonic vibration device according to the present invention.
Fig. 3 is a distribution diagram of an ultrasonic vibration device according to the present invention.
Fig. 4 is a schematic structural diagram of the upper ultrasonic vibration device at the position I in fig. 1 according to the present invention.
Fig. 5 is a schematic structural diagram of the lower ultrasonic vibration device at the position L in fig. 1 according to the present invention.
Detailed Description
In fig. 1, the present invention discloses a device for removing carbon deposits in a quencher of hexafluoropropylene reaction equipment, which comprises an upper vibration assembly and a lower vibration assembly, wherein the upper vibration assembly mainly comprises a plurality of upper ultrasonic vibration devices 14, upper control ends 1 of the upper ultrasonic vibration devices 14 are all connected with an upper controller 2, the upper ultrasonic vibration devices 14 are uniformly arranged on the outer surface of a top cover 4 of the quencher 3, the upper ultrasonic vibration devices 14 surround the top cover 4 of the quencher 3, in fig. 2 and 4, the upper vibration assembly of the present embodiment mainly comprises six upper ultrasonic vibration devices 14, the six upper ultrasonic vibration devices 14 are uniformly arranged on the outer surface of the top cover 4 of the quencher 3, each upper ultrasonic vibration device 14 is provided with an upper ultrasonic probe 10, one end of the upper ultrasonic probe 10 is connected with the outer surface of the top cover 4 of the quencher 3 through an upper connecting piece 11, the other end of the upper ultrasonic probe 10 is an upper control end 1, the upper ultrasonic probe 10 is connected with an upper controller 2 through the upper control end 1, an upper connecting piece 11 is arranged as a tube plate flange, and the upper controller 2 is arranged as a PLC (programmable logic controller); in fig. 3 and 5, the lower vibration assembly mainly includes a plurality of lower ultrasonic vibration devices 15, lower control ends 5 of the lower ultrasonic vibration devices 15 are all connected to the lower controller 6, the lower ultrasonic vibration devices 15 are uniformly installed on an outer surface of the bottom cover 7 of the quencher 3, the lower ultrasonic vibration devices 15 surround the bottom cover 7 of the quencher 3, the lower vibration assembly of the present embodiment mainly includes six lower ultrasonic vibration devices 15, the six lower ultrasonic vibration devices 15 are uniformly installed on an outer surface of the bottom cover 7 of the quencher 3, each lower ultrasonic vibration device 15 is provided with a lower ultrasonic probe 12, one end of the lower ultrasonic probe 12 is connected to an outer surface of the bottom cover 7 of the quencher 7 through a lower connecting member 13, the other end of the lower ultrasonic probe 12 is the lower control end 5, and the lower ultrasonic probe 12 is connected to the lower controller 6 through the lower control end 5. The lower connecting piece 13 is provided as a tube plate flange. The lower controller 6 is set as a PLC controller. Between the top cover 4 and the bottom cover 7 is a riser 8 of the quencher 3, each upper ultrasonic vibration device 14 corresponds to each lower ultrasonic vibration device 15, and a dust collector 9 is placed at the bottom of the quencher 3.
The invention also discloses a method for removing carbon deposition in the quencher of the hexafluoropropylene reaction equipment, firstly, the upper ultrasonic probe 10 and the lower ultrasonic probe 12 which are distributed at the upper part and the lower part of the quencher 1 send ultrasonic signals, the carbon powder gathered on the pipe wall of the vertical pipe 8 of the quencher 3 can not be adsorbed on the surface of the vertical pipe 8 of the quencher 3 through the vibration generated by the ultrasonic signals sent by the upper ultrasonic probe 10 and the lower ultrasonic probe 12, thereby uniformly collecting the self-polymerized carbon powder falling off from the pipe wall of the vertical pipe 8 of the quencher 3 into the dust collector 9, and realizing the continuous operation of the system process of the hexafluoropropylene reaction equipment. The invention takes 6000 tons/year hexafluoropropylene reaction device as an example, tetrafluoroethylene and octafluorocyclobutane (by-product generated by cracking tetrafluoroethylene) are mixed, proportioned and preheated, then enter a hexafluoropropylene removal reaction device for cracking and converting into crude cracked gas, the hexafluoropropylene removal reaction device is a tubular reactor, the main components of the hexafluoropropylene removal reaction device are hexafluoropropylene, tetrafluoroethylene, octafluorocyclobutane and a small amount of other gas phase by-products, and a certain amount of solid phase carbon powder is generated at the same time. And (3) quenching and cooling the crude cracked gas, then removing carbon powder in a carbon powder filter, and then performing subsequent processes to obtain a finished product of hexafluoropropylene. The crude cracked gas is quenched, but carbon powder is still adsorbed on a quencher, the size of the quencher is DN800 × 2500, the high-frequency vibration voltage of the upper ultrasonic probe 10 and the lower ultrasonic probe 12 is 220v, 50hz or 110v, 60hz, the high-frequency vibration frequency is 15khz-20 khz, and the corresponding upper controller 2 and the corresponding lower controller 6 are provided. And starting the upper ultrasonic probe 10 and the lower ultrasonic probe 12 every 7 days, wherein the processing time is 1 hour, and the dust collector 9 collects dust completely and cleans the dust once a month. Before the implementation, the quencher 3 is cleaned once every half year, and after the implementation, the quencher 3 does not need to be cleaned except for annual overhaul inspection.
Claims (10)
1. A device for removing carbon deposition in a quencher of hexafluoropropylene reaction equipment is characterized by comprising an upper vibration assembly and a lower vibration assembly, wherein the upper vibration assembly mainly comprises a plurality of upper ultrasonic vibration devices (14), the upper control ends (1) of the upper ultrasonic vibration devices (14) are connected with an upper controller (2), the upper ultrasonic vibration devices (14) are uniformly arranged on the outer surface of a top cover (4) of the quencher (3), the upper ultrasonic vibration devices (14) surround the top cover (4) of the quencher (3), the lower vibration assembly mainly comprises a plurality of lower ultrasonic vibration devices (15), the lower control ends (5) of the lower ultrasonic vibration devices (15) are connected with a lower controller (6), the lower ultrasonic vibration devices (15) are uniformly arranged on the outer surface of a bottom cover (7) of the quencher (3), and the lower ultrasonic vibration devices (15) surround the bottom cover (7) of the quencher (3), a vertical pipe (8) of the quencher (3) is arranged between the top cover (4) and the bottom cover (7), each upper ultrasonic vibration device (14) corresponds to each lower ultrasonic vibration device (15), and a dust collector (9) is arranged at the bottom of the quencher (3).
2. The apparatus for removing carbon deposits in a quench cooler of a hexafluoropropylene reaction device as set forth in claim 1, wherein the upper vibration assembly mainly comprises six upper ultrasonic vibration devices (14), and the six upper ultrasonic vibration devices (14) are uniformly installed on the outer surface of the top cover (4) of the quench cooler (3).
3. The device for removing carbon deposition in the quencher of the hexafluoropropylene reaction equipment as set forth in claim 1 or 2, wherein each upper ultrasonic vibration device (14) is provided with an upper ultrasonic probe (10), one end of the upper ultrasonic probe (10) is connected with the outer surface of the top cover (4) of the quencher (3) through an upper connecting piece (11), the other end of the upper ultrasonic probe (10) is an upper control end (1), and the upper ultrasonic probe (10) is connected with the upper controller (2) through the upper control end (1).
4. The apparatus for removing carbon deposit in a quencher of a hexafluoropropylene reaction unit as set forth in claim 3, wherein the upper connecting member (11) is configured as a tube plate flange.
5. The apparatus for removing carbon deposit in a quencher of a hexafluoropropylene reaction unit as set forth in claim 3, wherein the upper controller (2) is configured as a PLC controller.
6. The apparatus for removing carbon deposits in a quench cooler of a hexafluoropropylene reaction device as set forth in claim 1, wherein the lower vibration assembly mainly comprises six lower ultrasonic vibration devices (15), and the six lower ultrasonic vibration devices (15) are uniformly installed on the outer surface of the bottom cover (7) of the quench cooler (3).
7. The device for removing carbon deposition in the quencher of the hexafluoropropylene reaction equipment as set forth in claim 1 or 6, wherein each lower ultrasonic vibration device (15) is provided with a lower ultrasonic probe (12), one end of the lower ultrasonic probe (12) is connected with the outer surface of the bottom cover (7) of the quencher (7) through a lower connecting piece (13), the other end of the lower ultrasonic probe (12) is a lower control end (5), and the lower ultrasonic probe (12) is connected with the lower controller (6) through the lower control end (5).
8. The apparatus for removing soot in a quencher of a hexafluoropropylene reaction unit as set forth in claim 7, wherein the lower connecting member (13) is configured as a tube plate flange.
9. The apparatus for removing soot in a quencher of a hexafluoropropylene reaction unit as set forth in claim 7, wherein the lower controller (6) is configured as a PLC controller.
10. A method for removing carbon deposition in a quencher of hexafluoropropylene reaction equipment is characterized in that an upper ultrasonic probe (10) and a lower ultrasonic probe (12) which are distributed at the upper part and the lower part of a quencher (1) send ultrasonic signals, carbon powder gathered on the pipe wall of a vertical pipe (8) of the quencher (3) cannot be adsorbed on the surface of the vertical pipe (8) of the quencher (3) through vibration generated by the ultrasonic signals sent by the upper ultrasonic probe (10) and the lower ultrasonic probe (12), so that self-assembly carbon powder falling off from the pipe wall of the vertical pipe (8) of the quencher (3) is uniformly collected into a dust collector (9), and continuous operation of a system flow of the hexafluoropropylene reaction equipment is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111008436.1A CN113798279A (en) | 2021-08-31 | 2021-08-31 | Method and device for removing carbon deposition in quencher of hexafluoropropylene reaction equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111008436.1A CN113798279A (en) | 2021-08-31 | 2021-08-31 | Method and device for removing carbon deposition in quencher of hexafluoropropylene reaction equipment |
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| CN202111008436.1A Pending CN113798279A (en) | 2021-08-31 | 2021-08-31 | Method and device for removing carbon deposition in quencher of hexafluoropropylene reaction equipment |
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-
2021
- 2021-08-31 CN CN202111008436.1A patent/CN113798279A/en active Pending
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| CN108212922A (en) * | 2018-02-11 | 2018-06-29 | 中铁建设集团有限公司 | A kind of intelligent ultrasonics air transmission ＆ distribution pipeline cleaning system and method |
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