CN200984467Y - Flash vaporizer in the technics of synthesizing acetic anhydride and acetic acid by carbonyl - Google Patents
Flash vaporizer in the technics of synthesizing acetic anhydride and acetic acid by carbonyl Download PDFInfo
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- CN200984467Y CN200984467Y CN 200620048961 CN200620048961U CN200984467Y CN 200984467 Y CN200984467 Y CN 200984467Y CN 200620048961 CN200620048961 CN 200620048961 CN 200620048961 U CN200620048961 U CN 200620048961U CN 200984467 Y CN200984467 Y CN 200984467Y
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- flash vessel
- silk screen
- acetic acid
- vapor phase
- foam removal
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Abstract
In the process from carbonylation to flash evaporation of oxo-process anhydride acetic acid and acetic acid, the vapor material at the vapor phase outlet of flash evaporator often carries liquid droplets containing rhodium catalyst into following extraction system to cause loss of rhodium catalyst in carbonylation system. The utility model discloses a flash evaporator used in the process of oxo-process anhydride acetic acid and acetic acid, which comprises a drum body, a material inlet arranged at the side face of the drum body, a vapor phase outlet positioned at the top of the drum body and a liquid phase outlet arranged at the bottom of the drum body, wherein, a cyclone separation section and a silk net foam skimming section are arranged inside the vapor phase outlet. Through combining rotational flow plate and silk net skimmer, the utility model can effectively prevent liquid droplets carrying phenomenon, thereby reducing loss of rhodium catalyst.
Description
Technical field
The utility model is the flash vessel in a kind of oxo-acetic anhydride, the acetic acid technology, belongs to chemical industry equipment, is used for carbonylation catalyst and separates aceticanhydride or acetate products.
Background technology
In oxo-acetic anhydride or acetic acid technology, methyl acetate or methanol feedstock react in the oxonation device with carbon monoxide under rhodium catalyst and the effect of co-catalyst iodomethane and generate aceticanhydride or acetic acid.The product that contains homogeneous rhodium catalyst comes out to separate in flash vessel by vacuum flashing from the oxonation device.The vapour phase of flash vessel is aceticanhydride or acetic acid and the light component of part, separates to purify obtaining aceticanhydride or acetate products to the back system.The flash vessel bottom is that the mother liquor of rhodium-containing catalyst is back to the catalyst circulation process of finishing whole carbonylation one flash distillation in the oxonation device.Because the vapour phase of flash distillation is partly carried the drop of rhodium-containing catalyst secretly, at oxo-acetic anhydride, flash heater in the Processes for Producing Acetic Acid generally all is equipped with cyclone separator at the gaseous phase outlet place at top, the drop that makes rhodium-containing catalyst is condensed into bigger drop and gets back to liquid phase bottom the flash vessel, but still there is the droplet of small part rhodium-containing catalyst to enter into the loss that the back system causes the rhodium metal catalyst by cyclone separator with vapour phase, though the amount of this loss is very little, but, still directly have influence on the production cost of aceticanhydride or acetic acid because the price of rhodium metal catalyst is very expensive.
Summary of the invention
The purpose of this utility model is to provide a kind of flash vessel that is used for oxo-acetic anhydride or acetic acid technology, and it can stop rhodium-containing metallic catalyst drop to enter into the back system to greatest extent, effectively reduces the loss of rhodium metal catalyst.
For reaching above-mentioned purpose, the utility model provides a kind of flash vessel that is used for oxo-acetic anhydride and acetic acid technology, comprise cylindrical shell, be positioned at the material inlet of cylindrical shell side, be positioned at the cylindrical shell top vapor phase exit, be positioned at the liquid phase outlet of cylindrical shell bottom, wherein in vapor phase exit, be provided with cyclonic separation section and silk screen foam removal section.
In the above-mentioned flash vessel, silk screen foam removal section is arranged on the cyclonic separation section.
In the above-mentioned flash vessel, the cyclonic separation section is made of the eddy flow plate that comprises a plurality of blades.
In the above-mentioned flash vessel, eddy flow plate blade tilt is 15～30 °.
In the above-mentioned flash vessel, preferably 25 ° of eddy flow plate blade tilts.
In the above-mentioned flash vessel, the silk screen voidage of silk screen foam removal section is 0.97-0.99.
In the above-mentioned flash vessel, the silk screen voidage of silk screen foam removal section is preferably 0.98.
In the above-mentioned flash vessel, the height of silk screen foam removal section silk screen layer is 100～200mm.
In the above-mentioned flash vessel, the height of silk screen layer is preferably 150mm.
In the above-mentioned flash vessel, silk screen foam removal section two ends utilize flange and vapor phase exit to be connected and installed.
After adopting technique scheme, the rhodium-containing metallic catalyst drop of carrying secretly in the vapour phase of flash vessel is prevented from entering the back system to greatest extent by cyclonic separation and two kinds of means of silk screen foam removal, can effectively reduce the loss of rhodium metal catalyst, thereby reduce production cost.
The accompanying drawing summary
Fig. 1 is the schematic diagram of the utility model flash vessel.
Fig. 2 is the cutaway view of the cyclonic separation section of the utility model flash vessel.
Fig. 3 is the vertical view of the cyclonic separation section of the utility model flash vessel.
Fig. 4 be among Fig. 3 A-A to amplification view.
Fig. 5 is the cutaway view of the silk screen foam removal section of the utility model flash vessel
The specific embodiment
In Fig. 1, flash vessel of the present utility model comprises cylindrical shell 1, is positioned at the material inlet 2 of cylindrical shell 1 side, be positioned at cylindrical shell 1 top side vapor phase exit 3, be positioned at the liquid phase outlet 4 of cylindrical shell 1 bottom side, be arranged on the cyclonic separation section 5 in the vapor phase exit pipe 3.Also be provided with silk screen foam removal section 6 in the vapor phase exit pipe 3, this silk screen foam removal section 6 is arranged on the cyclonic separation section 5.
To shown in Figure 4, cyclonic separation section 5 is made of the eddy flow plate 51 that comprises the multi-disc blade as Fig. 2.Eddy flow plate 51 blade tilts are 15～30 ° of arrangements, preferably 25 °.
As shown in Figure 5, the silk screen voidage of silk screen foam removal section is 0.97-0.99, preferably 0.98.The height of silk screen layer is 100～200mm, is preferably 150mm.Two ends are connected and installed with flange 61 forms and vapor phase exit.
During use, the reactant liquor of being come by the oxonation device is after decompression, enter flash vessel from material inlet 2 with tangential direction, the vapour phase that flash distillation produces (forming) by aceticanhydride or acetic acid, carbon monoxide, hydrogen, iodomethane, methyl acetate etc. along the rotation of flashed vapour wall rise through vapor phase exit 3 outer walls are broken revolve that baffle plate is broken and revolve after, the catalyst drop that contains that it is carried secretly partly condenses the liquid phase that flows into the collecting tank (not shown) and be discharged to the flash vessel bottom by catheter.Still have the part droplet to be carried secretly and enter vapor phase exit 3 by vapour phase, through condensing the liquid phase that flows to the flash vessel bottom by catheter by the major part droplet after the cyclonic separation section 5, the remaining droplet overwhelming majority by the cyclonic separation section is at last stayed and flows to the liquid phase of flash vessel bottom by silk screen foam removal section 6, and the liquid phase of flash vessel bottom (catalyst mother liquor) is circulated to the oxonation device.
More than explanation and description only are a kind of embodiments that adopts for those skilled in the art can understand the utility model better, protection domain of the present utility model are not construed as limiting.Under the situation that does not break away from claim scope required for protection, the utility model can carry out any correction and change.
Claims (10)
1. flash vessel that is used for oxo-acetic anhydride and acetic acid technology, comprise cylindrical shell (1), be positioned at the material inlet (2) of cylindrical shell (1) side, be positioned at cylindrical shell (1) top vapor phase exit (3), be positioned at the liquid phase outlet (4) of cylindrical shell (1) bottom, it is characterized in that: be provided with cyclonic separation section (5) and silk screen foam removal section (6) in the vapor phase exit (3).
2. flash vessel as claimed in claim 1 is characterized in that: silk screen foam removal section (6) is arranged on the cyclonic separation section (5).
3. flash vessel as claimed in claim 1 or 2 is characterized in that: cyclonic separation section (5) is made of the eddy flow plate (51) that comprises a plurality of blades.
4. flash vessel as claimed in claim 3 is characterized in that: eddy flow plate (51) blade tilt is 15～30 °.
5. flash vessel as claimed in claim 4 is characterized in that: preferably 25 ° of eddy flow plate (51) blade tilts.
6. flash vessel as claimed in claim 1 or 2 is characterized in that: the silk screen voidage of silk screen foam removal section (6) is 0.97-0.99.
7. flash vessel as claimed in claim 6 is characterized in that: the silk screen voidage of silk screen foam removal section (6) is preferably 0.98.
8. flash vessel as claimed in claim 1 or 2 is characterized in that: the height of silk screen foam removal section (6) silk screen layer is 100～200mm.
9. flash vessel as claimed in claim 8 is characterized in that: the height of silk screen layer is preferably 150mm.
10. flash vessel as claimed in claim 1 or 2 is characterized in that: silk screen foam removal section (6) two ends utilize flange (61) and vapor phase exit (3) to be connected and installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620048961 CN200984467Y (en) | 2006-12-14 | 2006-12-14 | Flash vaporizer in the technics of synthesizing acetic anhydride and acetic acid by carbonyl |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620048961 CN200984467Y (en) | 2006-12-14 | 2006-12-14 | Flash vaporizer in the technics of synthesizing acetic anhydride and acetic acid by carbonyl |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200984467Y true CN200984467Y (en) | 2007-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620048961 Expired - Fee Related CN200984467Y (en) | 2006-12-14 | 2006-12-14 | Flash vaporizer in the technics of synthesizing acetic anhydride and acetic acid by carbonyl |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200984467Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018078924A1 (en) * | 2016-10-28 | 2018-05-03 | 株式会社ダイセル | Production method for acetic acid |
| US10266473B2 (en) | 2016-10-28 | 2019-04-23 | Daicel Corporation | Method for producing acetic acid |
| CN111714914A (en) * | 2020-07-07 | 2020-09-29 | 山东禹王生态食业有限公司 | Flash tank for preventing material from leaking |
| CN114288759A (en) * | 2021-12-17 | 2022-04-08 | 北京航天环境工程有限公司 | A pneumatic high-efficiency defoaming device for evaporative separation equipment |
-
2006
- 2006-12-14 CN CN 200620048961 patent/CN200984467Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018078924A1 (en) * | 2016-10-28 | 2018-05-03 | 株式会社ダイセル | Production method for acetic acid |
| JPWO2018078924A1 (en) * | 2016-10-28 | 2018-10-25 | 株式会社ダイセル | Method for producing acetic acid |
| US10266473B2 (en) | 2016-10-28 | 2019-04-23 | Daicel Corporation | Method for producing acetic acid |
| CN110214132A (en) * | 2016-10-28 | 2019-09-06 | 株式会社大赛璐 | The preparation method of acetic acid |
| CN111714914A (en) * | 2020-07-07 | 2020-09-29 | 山东禹王生态食业有限公司 | Flash tank for preventing material from leaking |
| CN114288759A (en) * | 2021-12-17 | 2022-04-08 | 北京航天环境工程有限公司 | A pneumatic high-efficiency defoaming device for evaporative separation equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071205 Termination date: 20100114 |