CN203209060U - Cracking furnace used for preparing vinylidene fluoride and provided with gas-phase static spiral mixer and inner fins - Google Patents
Cracking furnace used for preparing vinylidene fluoride and provided with gas-phase static spiral mixer and inner fins Download PDFInfo
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- CN203209060U CN203209060U CN 201320194047 CN201320194047U CN203209060U CN 203209060 U CN203209060 U CN 203209060U CN 201320194047 CN201320194047 CN 201320194047 CN 201320194047 U CN201320194047 U CN 201320194047U CN 203209060 U CN203209060 U CN 203209060U
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Abstract
The utility model relates to a cracking furnace for preparing vinylidene fluoride, and in particular relates to a cracking furnace used for preparing vinylidene fluoride and provided with a gas-phase static spiral mixer and inner fins, wherein the gas-phase static spiral mixer is arranged in a furnace tube of the cracking furnace and the inner fins are arranged on the inner side of the furnace tube. The cracking furnace used for preparing the vinylidene fluoride and provided with the gas-phase static spiral mixer and the inner fins is characterized by mainly comprising the gas-phase static spiral mixer and the inner fins, wherein the gas-phase static spiral mixer is installed in the furnace tube of the cracking furnace; the inner fins are installed on the inner wall of the furnace tube of the cracking furnace, and located in an open space between the gas-phase static spiral mixer and the furnace tube; and the inner fins are corrugated discontinuous inner fins or zigzag discontinuous inner fins or bulged discontinuous inner fins. According to the cracking furnace for preparing the vinylidene fluoride, by changing the structure of a reactor of the furnace tube of the cracking furnace, the local overheating of reaction materials can be avoided while heat exchange is effectively improved and promoted, and then the conversion rate and the selectivity of cracking reaction for vinylidene fluoride preparation are promoted.
Description
Technical field
The utility model relates to and is provided with the static ribbon mixer of gas phase in a kind of pyrolysis furnace for preparing vinylidene, particularly cracking furnace tube, and the boiler tube inboard has the pyrolysis furnace of the preparation vinylidene of fin.
Background technology
Vinylidene is a kind of very important fluorine-containing unsaturated olefin, gets final product homopolymerization, but copolymerization again can also be carried out multiple important addition reaction, is the higher fluoride of a kind of chemism.It can be made into multiple fluoro-containing macromolecule material such as Kynoar, fluorubber and fluoroether rubber etc.
The method for preparing vinylidene is a lot, according to the difference of raw material, and can be from halo ethane derivative, halide derivative and other feedstock production; According to the reactive mode difference, can carry out thermal cracking, dilution pyrolysis, copyrolysis and catalyse pyrolysis.As seen, no matter be to adopt which kind of raw material or reactive mode, pyrolysis furnace all is the nucleus equipment of preparation vinylidene.
1,1,1-difluoro monochlorethane dehydrochlorination method is the main method of producing vinylidene at present, and reaction equation is:
CF
2CLCH
3?→CF
2=CH
2?+?HCL
Above pyrolytic reaction is to carry out under 550～900 ℃ in the cracking furnace tube, very responsive to reaction temperature, reaction can obtain very high conversion ratio more than 650 ℃, but too high temperature will obviously reduce selective that vinylidene generates, generate a large amount of carbide, stop up reaction boiler tube.Generally in order to reduce reaction temperature, can in reaction raw materials, add small amounts of promoters as chlorine or carbon tetrachloride etc.; Also can add diluent as water vapour or carbon dioxide etc.; Also have and in the presence of catalyst, carry out cracking reaction.
But if can control the condition of reaction well, even do not have so under the condition of promoter, diluent or catalyst existence, this cracking reaction also can obtain very high conversion ratio and productive rate.As seen, though the pyrolytical condition of 1,1,1-difluoro monochlorethane dehydrochlorination is very not harsh, it is very easy to obtain very high conversion ratio and vinylidene productive rate simultaneously.
Therefore, change the structure of cracking furnace tube reactor, conduct heat to improve, thereby make that reaction raw materials is heated evenly, enhanced heat exchange in boiler tube, and then guarantee 1 effectively, 1,1-difluoro monochlorethane up in more than 99.2%, still can make cracking reaction selectively maintaining more than 99.5% vinylidene at conversion ratio.
The utility model content
Remain the problem further strengthened at the heat transfer that exists in the prior art, the purpose of this utility model is to provide a kind of preparation vinylidene pyrolysis furnace that has the static ribbon mixer of gas phase and inner fin, can promote the exchange capability of heat of cracking furnace tube effectively, and then can promote chemical reaction, enhance productivity.
The purpose of this utility model is realized by following technical proposals: the preparation vinylidene pyrolysis furnace that has the static ribbon mixer of gas phase and inner fin, it is characterized in that: mainly comprise the static ribbon mixer of gas phase and inner fin, the static ribbon mixer of gas phase is installed in the cracking furnace tube; Inner fin is installed in the cracking furnace tube inwall, the place, space between the static ribbon mixer of gas phase and boiler tube.
The described preparation vinylidene pyrolysis furnace that has the static ribbon mixer of gas phase and inner fin, it is characterized in that: the static ribbon mixer of the gas phase that arranges in the described cracking furnace tube refers to the fixedly spiral impeller of 180 ° of distortions, and adjacent spiral plate is respectively left-handed and dextrorotation when being fit into boiler tube.
The described preparation vinylidene pyrolysis furnace that has the static ribbon mixer of gas phase and inner fin, it is characterized in that: have the slit between the static ribbon mixer of described gas phase and the cracking furnace tube inwall, the two ends of static ribbon mixer are fixed on the cracking furnace tube.
The described preparation vinylidene pyrolysis furnace that has the static ribbon mixer of gas phase and inner fin is characterized in that: the inner fin that arranges on the described cracking furnace tube inboard refers to the discontinuous inner fin of corrugated discontinuous inner fin, the discontinuous inner fin of zigzag or band projection.
Advantage of the present utility model is, owing in cracking furnace tube, be provided with the static ribbon mixer of gas phase, when making reaction raw materials gas and left-handed, the time and dextrorotation, constantly change flow direction, not only push central liquid stream to periphery, and push peripheral fluid to center, thereby cause good radially mixed effect.Simultaneously, the turning effort of fluid self also can take place on the interface of adjacent component junction, and this perfect radial circular flow immixture makes material obtain to mix more uniformly.In addition, at the cracking furnace tube inwall, place, space between the static ribbon mixer of gas phase and boiler tube is provided with inner fin, increased the heat exchange area of heating furnace tubing inboard, also increased simultaneously from static ribbon mixer and boiler tube inwall gap location, percolation and the disturbance of the reactor feed gas crossed, thus mixing and the heat transfer of boiler tube reaction gases further strengthened.So just making heat transfer intensity in the resulting pyrolysis furnace unit volume of the utility model, is to be far longer than general preparation vinylidene pyrolysis furnace, and simultaneously, the Temperature Distribution of cracking furnace tube internal reaction unstripped gas is also more even.
Description of drawings
Fig. 1 is the schematic diagram that has the preparation vinylidene pyrolysis furnace of the static ribbon mixer of gas phase and inner fin.1 is inner fin, and 2 is static ribbon mixer, and 3 is heating muff, and 4 is cracking furnace tube.
Fig. 2 is the schematic diagram that has the preparation vinylidene cracking furnace tube of the static ribbon mixer of gas phase and inner fin.1 is inner fin, and 2 is static ribbon mixer.
Fig. 3 is the schematic diagram of corrugated fin.
Fig. 4 is the schematic diagram of zigzag fin.
Fig. 5 is the schematic diagram with protruding fin.
The specific embodiment
With reference to the accompanying drawings, the utility model is further described:
Referring to accompanying drawing 1～5, the preparation vinylidene pyrolysis furnace that has the static ribbon mixer of gas phase and inner fin of the present utility model is to have the static ribbon mixer 2 of gas phase and inner fin 1, and wherein the periphery of cracking furnace tube 4 is heating jackets 3; The static ribbon mixer 2 of gas phase is installed in the cracking furnace tube 4, has the slit between the static ribbon mixer 2 of gas phase and cracking furnace tube 4 inwalls, and the two ends of static ribbon mixer 2 are fixed on the cracking furnace tube 4; Inner fin 1 is installed in cracking furnace tube 4 inwalls, the place, space between the static ribbon mixer 2 of gas phase and boiler tube 4, and the form of inner fin can be the discontinuous inner fin of corrugated discontinuous inner fin, the discontinuous inner fin of zigzag or band projection.
Embodiment 1: at reactor feed gas 1,1, add a small amount of water vapor or carbon dioxide inert diluent in the 1-difluoro monochlorethane, and the static ribbon mixer 2 of gas phase and inner fin 1 are set in cracking furnace tube 4, conduct heat to improve.Under hot conditions, heat scission reaction takes place in 1,1,1-difluoro monochlorethane in cracking furnace tube 4, and dehydrochlorination is discharged by the outlet of cracking furnace tube with the product vinylidene.
The needed heat of heat scission reaction is to be provided by the heating jacket 3 in cracking furnace tube 4 peripheries, though improve reaction temperature or increase reaction time, 1,1, the conversion ratio of 1-difluoro monochlorethane can improve thereupon, but the side reaction aggravation, the selective decline of vinylidene.Simultaneously, 1,1,1-difluoro monochlorethane at high temperature also easily cracking generate knot carbon, cause line clogging.In this example 1, can be corrugated discontinuous inner fin, the discontinuous inner fin of zigzag or be with protruding discontinuous inner fin by the static ribbon mixer 2 of the gas phase that in cracking furnace tube 4, arranges and inner fin 1(shape), unstripped gas mixes in boiler tube 4 strongly, when increasing heat exchange area, improved the heat exchange of pyrolysis furnace, also overcome the problem of localized hyperthermia, even react under up to 950 ℃ condition in temperature, 1,1, the conversion ratio of 1-difluoro monochlorethane has selectively also maintained 99.5% in up to 99.2%.Simultaneously, the coke content in the cracking furnace tube 4 is also few.
Claims (4)
1. preparation vinylidene pyrolysis furnace that has the static ribbon mixer of gas phase and inner fin, it is characterized in that: mainly comprise the static ribbon mixer of gas phase (2) and inner fin (1), the static ribbon mixer of gas phase (2) is installed in the cracking furnace tube (4); Inner fin (1) is installed in cracking furnace tube (4) inwall, the place, space between the static ribbon mixer of gas phase and boiler tube.
2. the preparation vinylidene pyrolysis furnace that has the static ribbon mixer of gas phase and inner fin according to claim 1, it is characterized in that: the static ribbon mixer of the gas phase that arranges in the described cracking furnace tube (4) (2) refers to the fixedly spiral impeller of 180 ° of distortions, and adjacent spiral plate is respectively left-handed and dextrorotation when being fit into boiler tube.
3. the preparation vinylidene pyrolysis furnace that has the static ribbon mixer of gas phase and inner fin according to claim 1, it is characterized in that: have the slit between the static ribbon mixer (2) of described gas phase and cracking furnace tube (4) inwall, the two ends of static ribbon mixer (2) are fixed on the cracking furnace tube (4).
4. the preparation vinylidene pyrolysis furnace that has the static ribbon mixer of gas phase and inner fin according to claim 1, it is characterized in that: the inner fin (1) of setting refers to corrugated discontinuous inner fin, the discontinuous inner fin of zigzag or is with protruding discontinuous inner fin described cracking furnace tube (4) the inboard on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320194047 CN203209060U (en) | 2013-04-17 | 2013-04-17 | Cracking furnace used for preparing vinylidene fluoride and provided with gas-phase static spiral mixer and inner fins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320194047 CN203209060U (en) | 2013-04-17 | 2013-04-17 | Cracking furnace used for preparing vinylidene fluoride and provided with gas-phase static spiral mixer and inner fins |
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| Publication Number | Publication Date |
|---|---|
| CN203209060U true CN203209060U (en) | 2013-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320194047 Expired - Lifetime CN203209060U (en) | 2013-04-17 | 2013-04-17 | Cracking furnace used for preparing vinylidene fluoride and provided with gas-phase static spiral mixer and inner fins |
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|---|---|
| CN (1) | CN203209060U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107583592A (en) * | 2017-10-30 | 2018-01-16 | 清华大学 | Mixing eddy flow double tube reactor is penetrated without blocking |
| CN113976046A (en) * | 2021-10-22 | 2022-01-28 | 江苏格兰环境科技有限公司 | Novel anti-coking VDF cracking furnace system and using method thereof |
-
2013
- 2013-04-17 CN CN 201320194047 patent/CN203209060U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107583592A (en) * | 2017-10-30 | 2018-01-16 | 清华大学 | Mixing eddy flow double tube reactor is penetrated without blocking |
| CN113976046A (en) * | 2021-10-22 | 2022-01-28 | 江苏格兰环境科技有限公司 | Novel anti-coking VDF cracking furnace system and using method thereof |
| CN113976046B (en) * | 2021-10-22 | 2022-05-03 | 江苏格兰环境科技有限公司 | Novel anti-coking VDF cracking furnace system and using method thereof |
| WO2023065575A1 (en) * | 2021-10-22 | 2023-04-27 | 江苏格兰环境科技有限公司 | Novel anti-coking vdf cracking furnace system and method for using same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 811600 Gan he Industrial Park, Xining economic and Technological Development Zone, Qinghai Patentee after: Qinghai West Tongxin Chemical Co.,Ltd. Address before: 811600 Qinghai Xining Qinghai Xining economic and Technological Development Zone Gan he Industrial Park Patentee before: QINGHAI TONGXIN CHEMICAL Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130925 |