CN1907956A - Method of preventing evaporator from crystallizing in process of preparing N,N-dimethyl formamide and crystallizing-proof evaporator - Google Patents
Method of preventing evaporator from crystallizing in process of preparing N,N-dimethyl formamide and crystallizing-proof evaporator Download PDFInfo
- Publication number
- CN1907956A CN1907956A CNA2006100529237A CN200610052923A CN1907956A CN 1907956 A CN1907956 A CN 1907956A CN A2006100529237 A CNA2006100529237 A CN A2006100529237A CN 200610052923 A CN200610052923 A CN 200610052923A CN 1907956 A CN1907956 A CN 1907956A
- Authority
- CN
- China
- Prior art keywords
- heating tube
- inert solid
- wall
- crystallization
- well heater
- 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.)
- Granted
Links
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title abstract description 4
- 230000008569 process Effects 0.000 title description 2
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 239000002245 particle Substances 0.000 claims abstract description 24
- 239000007787 solid Substances 0.000 claims abstract description 22
- 238000002425 crystallisation Methods 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 239000000376 reactant Substances 0.000 claims abstract description 8
- 150000003839 salts Chemical class 0.000 claims abstract description 7
- 230000008025 crystallization Effects 0.000 claims abstract description 5
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 230000009471 action Effects 0.000 claims abstract description 4
- 239000006200 vaporizer Substances 0.000 claims description 18
- 239000004744 fabric Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000006004 Quartz sand Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses an anti-crystallization evaporator and a method for preventing crystallization during N, N-dimethylformamide production. A spiral heating pipe is installed vertically in a heater and embedded with some inert solid particles. When the liquid reactants pass through the heating pipe, the inert solid particles are fluidized and suspended in the heating pipe. As the heating pipe is spiral, high-temperature liquid reactants will rotate upward, and the inert solid particles tend to the pipe wall with centrifugal force action and constantly strike the wall. When salt is crystallized on the heating surface, it will leave the wall surface with the impact and is brought out the heater by fluid, thus it can maintain the heating surface clean, not plug the heater, and has improved heat transfer as the impact of solid particles on the wall and disruption of the heat transfer boundary layer. The invention solves the problems of the background technology and achieves good economical and social benefits.
Description
Technical field
Anti-crystallization method of a kind of vaporizer of the present invention and anti-crystallization vaporizer.
Background technology
N, dinethylformamide (English name N, N-Dimethyl formamide are called for short DMF) is extremely wide industrial chemicals of a kind of purposes and fine solvent.The synthetic method of DMF has multiple, commonly used a kind of be dimethylamine and carbon monoxide high-temperature high-voltage reaction and getting in the presence of catalyzer.Reactant need steam product DMF through a vaporizer, owing to contain the salt that sodium bicarbonate, yellow soda ash and sodium formiate etc. are insoluble in DMF in the reactant, reactant is in evaporative process, salt is easy on the vaporizer heating-wall crystallization and separates out, and causes stopping up and cisco unity malfunction in the vaporizer, needs to stop production, water cleans vaporizer, make that workman's productive labor intensity is big, production cost improves, and environment has been polluted in the rinse water discharge that contains a large amount of DMF and salt simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of N, anti-crystallization method of vaporizer and anti-crystallization vaporizer during dinethylformamide is produced.
One, a kind of N, the anti-crystallization method of vaporizer during dinethylformamide is produced:
Adopt a kind of spirrillum heating tube in the well heater, the vertical placement, heating tube is built-in with some inert solid particles, and when reactant liquid passed through this heating tube, inert solid particle was fluidized and is suspended in the heating tube; Because heating tube is a spirrillum, pyroreaction thing liquid will rotate and move upward, and this moment, inert solid particle was subjected to action of centrifugal force trend tube wall, constantly impact tube wall in rotational flow field, as salt when crystallization is separated out on hot face, to be subjected to this bump and break away from the tube wall face, finally be taken out of well heater, can keep the hot face cleaning like this by fluid, well heater can be not blocked, because solid particulate bump wall has been upset heat transfer boundary layer, heat-transfer effect is improved simultaneously.
Two, a kind of N, the anti-crystallization vaporizer during dinethylformamide is produced:
Comprise the well heater that has steam and taphole, condensation-water drain, solution inlet port and heating steam import, the heating tube upper/lower terminal in the well heater is equipped with screen cloth respectively, has the secondary steam outlet and finishes the gas-liquid separator that liquid exports.Described heating tube is a spiral heating tube, and spiral heating tube is built-in with inert solid particle.
Described inert solid particle is a quartz sand particle.
The present invention compares the beneficial effect that has with background technology: owing to adopt spiral heating tube, heating tube is built-in with inert solid particle, when pyroreaction thing liquid passes through this heating tube, inert solid particle is with the continuous impact tube wall of hot-fluid, keep the hot face cleaning, heat-transfer effect is improved.The invention solves the production difficult problem in the background technology, obtained good economic benefits and social benefit.
Description of drawings
Fig. 1 is the evaporation structure synoptic diagram;
Fig. 2 is a spiral heating tube apparatus structure synoptic diagram.
Among the figure: 1, steam and taphole, 2, screen cloth, 3, spiral heating tube, 4, inert solid particle, 5, condensation-water drain, 6, screen cloth, 7, solution inlet port, 8, the heating steam import, 9, the secondary steam outlet, 10, finish the liquid outlet.
Embodiment
As shown in Figure 1 and Figure 2, the present invention includes the well heater that has steam and taphole 1, condensation-water drain 5, solution inlet port 7 and heating steam import 8, heating tube upper/lower terminal in the well heater is equipped with screen cloth 2 and screen cloth 6 respectively, has secondary steam outlet 9 and finish liquid to export 10 gas-liquid separator.Described heating tube is a spiral heating tube 3, or the heating tube 3 of 3, two kinds of forms of heating tube of the guiding device of placement spring-like is built-in with inert solid particle in smooth pipe.
Principle of work of the present invention:
Adopt a kind of spirrillum heating tube 3 (or in smooth pipe, placing the guiding device of spring-like), the vertical placement, some inert solid particles 4 (as quartz sand particle) are arranged in the vaporizer heating tube 3, when reactant (DMF) liquid was evaporated by this heating tube, quartz sand particle was fluidized and is suspended in wherein.Because heating tube is a spirrillum, DMF liquid will rotate and move upward, and this moment, quartz sand particle was subjected to action of centrifugal force trend tube wall in rotational flow field, constantly clashed into wall, as salt when crystallization is separated out on hot face, to be subjected to this bump and break away from wall, finally be taken out of vaporizer, can keep the hot face cleaning like this by fluid and steam, vaporizer can be not blocked, because solid particulate bump wall has been upset heat transfer boundary layer, heat-transfer effect is further enhanced simultaneously.
Above-mentioned embodiment is used for the present invention that explains, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, any modification and change to the present invention makes all fall into protection scope of the present invention.
Claims (3)
1, a kind of N, the anti-crystallization method of vaporizer during the N dimethyl formamide is produced, adopt a kind of spirrillum heating tube in the well heater, the vertical placement, heating tube is built-in with some inert solid particles, when reactant liquid passed through this heating tube, inert solid particle was fluidized and is suspended in the heating tube; Because heating tube is a spirrillum, pyroreaction thing liquid will rotate and move upward, and this moment, inert solid particle was subjected to action of centrifugal force trend tube wall, constantly impact tube wall in rotational flow field, as salt when crystallization is separated out on hot face, to be subjected to this bump and break away from the tube wall face, finally be taken out of well heater, can keep the hot face cleaning like this by fluid, well heater can be not blocked, because solid particulate bump wall has been upset heat transfer boundary layer, heat-transfer effect is improved simultaneously.
2, a kind of N, anti-crystallization vaporizer during the N dimethyl formamide is produced, comprise the well heater that has steam and taphole, condensation-water drain, solution inlet port and heating steam import, heating tube upper/lower terminal in the well heater is equipped with screen cloth respectively, has the secondary steam outlet and finishes the gas-liquid separator that liquid exports; It is characterized in that: described heating tube is a spiral heating tube, and spiral heating tube is built-in with inert solid particle.
3, a kind of N according to claim 2, the anti-crystallization vaporizer during the N dimethyl formamide is produced, it is characterized in that: described inert solid particle is a quartz sand particle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100529237A CN100371315C (en) | 2006-08-14 | 2006-08-14 | Method of preventing evaporator from crystallizing in process of preparing N,N-dimethyl formamide and crystallizing-proof evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100529237A CN100371315C (en) | 2006-08-14 | 2006-08-14 | Method of preventing evaporator from crystallizing in process of preparing N,N-dimethyl formamide and crystallizing-proof evaporator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1907956A true CN1907956A (en) | 2007-02-07 |
| CN100371315C CN100371315C (en) | 2008-02-27 |
Family
ID=37699209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100529237A Expired - Fee Related CN100371315C (en) | 2006-08-14 | 2006-08-14 | Method of preventing evaporator from crystallizing in process of preparing N,N-dimethyl formamide and crystallizing-proof evaporator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100371315C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102949856A (en) * | 2011-08-26 | 2013-03-06 | 俞天翔 | Natural-circulation self-cleaning evaporation device |
| CN113166041A (en) * | 2018-11-29 | 2021-07-23 | 昭和电工株式会社 | Process for producing N-vinylcarboxylic acid amide |
-
2006
- 2006-08-14 CN CNB2006100529237A patent/CN100371315C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102949856A (en) * | 2011-08-26 | 2013-03-06 | 俞天翔 | Natural-circulation self-cleaning evaporation device |
| CN102949856B (en) * | 2011-08-26 | 2015-05-06 | 俞天翔 | Natural-circulation self-cleaning evaporation device |
| CN113166041A (en) * | 2018-11-29 | 2021-07-23 | 昭和电工株式会社 | Process for producing N-vinylcarboxylic acid amide |
| CN113166041B (en) * | 2018-11-29 | 2023-03-17 | 昭和电工株式会社 | Process for producing N-vinylcarboxylic acid amide |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100371315C (en) | 2008-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103112888B (en) | Titanium tetrachloride production system and method for recycling titanium tetrachloride from slurry | |
| CN105776706B (en) | A kind of device and method of flue multistage evaporation processing desulfurization wastewater | |
| CN211896044U (en) | Circulating device for spraying yellow phosphorus furnace gas and yellow phosphorus furnace gas condensation system | |
| CN103868087A (en) | Method and device for cooperatively enhancing PM2.5 (Particulate Matter 2.5) removal and smoke afterheat deep utilization | |
| CN102659197A (en) | Water treatment process for recovering heavy oil recovery produced water to serve as boiler feed water | |
| CN209147121U (en) | A kind of device for utilizing waste of boiler | |
| CN103143220A (en) | Wet dust removal device and technique for titanium tetrachloride smoke | |
| CN100371315C (en) | Method of preventing evaporator from crystallizing in process of preparing N,N-dimethyl formamide and crystallizing-proof evaporator | |
| CN206607044U (en) | A kind of thermal power plant's exhaust steam residual heat utilizes device | |
| CN111389044A (en) | Anti-scaling evaporative crystallization system and method | |
| CN2936373Y (en) | Evaporator for preventing acicular separating out on heating pipe wall | |
| CN113430001A (en) | Online heating, descaling and desanding device for oilfield wellhead produced liquid and application method thereof | |
| CN102080209A (en) | Vacuum coating device | |
| CN208990525U (en) | A kind of high-efficiency ceramic flue gas processing device | |
| CN200941030Y (en) | Heat exchanger of preventing precipitation of crystal on heat exchanging pipe wall | |
| CN104368278B (en) | A kind of filtering type sulfur melting kettle | |
| CN205991640U (en) | Source pump and the dead-beat source crude sewage heating system using this source pump | |
| CN206073753U (en) | A kind of water-saving cooling tower | |
| CN1908569A (en) | Method for heat exchanger anti-blocking in N,N-dimethyl formamide production process and anti-blocking heat exchanger | |
| CN105925322B (en) | A kind of upright broken line type high temperature pyrolysis air cooling and waste-heat recovery device | |
| CN204910903U (en) | Take whirl dirt separator of gas -liquid separation function | |
| CN108036346A (en) | Suitable for the energy saving micro- discharge method of cigarette vapour and device of boiler | |
| CN201110556Y (en) | Chimney air flue equipment of boiler flue gas rinsing method heat recovering | |
| CN105819527A (en) | Descaling separation assembly and landfill leachate MVR evaporation device comprising same | |
| CN107252593A (en) | High temperature coal smoke water bath dust removing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |