CN1908569A - Method for heat exchanger anti-blocking in N,N-dimethyl formamide production process and anti-blocking heat exchanger - Google Patents
Method for heat exchanger anti-blocking in N,N-dimethyl formamide production process and anti-blocking heat exchanger Download PDFInfo
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- CN1908569A CN1908569A CN 200610052924 CN200610052924A CN1908569A CN 1908569 A CN1908569 A CN 1908569A CN 200610052924 CN200610052924 CN 200610052924 CN 200610052924 A CN200610052924 A CN 200610052924A CN 1908569 A CN1908569 A CN 1908569A
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- Prior art keywords
- heat exchanger
- heat
- tube
- blocking
- inert solid
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- 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 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 239000002245 particle Substances 0.000 claims abstract description 26
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 239000007787 solid Substances 0.000 claims abstract description 20
- 150000003839 salts Chemical class 0.000 claims abstract description 7
- 230000009471 action Effects 0.000 claims abstract description 4
- 230000008676 import Effects 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 239000006004 Quartz sand Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000002425 crystallisation Methods 0.000 claims description 4
- 230000008025 crystallization Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000000376 reactant Substances 0.000 abstract description 4
- 239000011343 solid material Substances 0.000 abstract 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 1
- 239000004280 Sodium formate Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008187 granular material Substances 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
- 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
- 235000019254 sodium formate Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Disclosed is a method for heat exchanger anti-blocking in N, N-dimethyl formamide production process and anti-blocking heat exchanger. In the heat exchanger a twist heat exchange tube is used and laid vertically. Some inert solid materials are positioned in the heat exchange tube, when the high temperature reactant fluid passes through the heat exchange tube, the inert solid materials are fluidized to suspend in the heat exchange tube. Due to the twist heat exchange tube, the high temperature reactant fluid will move upward in a whirl, at this time the inert solid materials are subjected to the action of the centrifugal force in the rotary flow field to trend toward the tube wall and strike the tube wall continually. When the salts are seeded out on the heat transfer surface to break away from the tube wall because the strike and finally are carried out of the heat exchanger by the fluid, which can keeps the heat transfer surface clean and the heat exchanger can not be blocked, meanwhile, owing to the strike on the wall face by the solid particle, the heat transfer boundary layer is disturbed to improve the heat transfer efficiency. The invention solves the producing problems in the background art and obtains good economic benefit and the social benefit.
Description
Technical field
The present invention relates to a kind of heat exchanger anti-blocking method and anti-blocking heat exchanger.
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 catalyst.Institute's liberated heat needs through a heat exchanger heat to be taken out in this course of reaction, owing to contain sodium acid carbonate in the reactant, sodium carbonate and sodium formate etc. are insoluble in the salt of DMF, reactant is in the heat exchange temperature-fall period, salt reaches supersaturation and is easy on the heat exchanger wall crystallization in DMF separates out, cause the heat exchanger heat exchange rate to reduce, stop up and cisco unity malfunction in the final heat exchanger, the heat exchanger operation will stop production in 2～3 days, water cleans heat exchanger, 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, heat exchanger anti-blocking method during dinethylformamide is produced.
The technical solution adopted for the present invention to solve the technical problems is:
One, a kind of N, heat exchanger anti-blocking method during dinethylformamide is produced:
Adopt a kind of spiral heat exchange tube in the heat exchanger, the vertical placement, heat exchanger tube is built-in with some inert solid particles, and when pyroreaction thing liquid passed through this heat exchanger tube, inert solid particle was fluidized and is suspended in the heat exchanger tube.Because heat exchanger tube is a helical form, 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 heat-transfer surface, to be subjected to this bump and break away from the tube wall face, finally be taken out of heat exchanger, can keep the heat-transfer surface cleaning like this by fluid, heat exchanger can be not blocked, because solid particle bump wall has been upset heat transfer boundary layer, heat-transfer effect is improved simultaneously.
Two, a kind of N, the anti-blocking heat exchanger during dinethylformamide is produced:
Comprise the heat exchanger that has hot fluid outlet, cold fluid outlet, hot fluid import and cold fluid import, the heat exchanger tube upper/lower terminal in the heat exchanger is equipped with screen cloth respectively.Described heat exchanger tube is the spirality heat exchanger tube, and the spirality heat exchanger 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 the spirality heat exchanger tube, heat exchanger tube is built-in with inert solid particle, when pyroreaction thing liquid passes through this heat exchanger tube, inert solid particle is with the continuous impact tube wall of hot-fluid, keep the heat-transfer surface 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 heat exchanger structure schematic diagram;
Fig. 2 is a spirality heat exchange tube device structural representation.
Among the figure: 1, hot fluid outlet, 2, screen cloth, 3, the spirality heat exchanger tube, 4, inert solid particle, 5, the cold fluid outlet, 6, screen cloth, 7, the hot fluid import, 8, the cold fluid import.
The specific embodiment
As shown in Figure 1 and Figure 2, the present invention includes the heat exchanger that has hot fluid outlet 1, cold fluid outlet 5, hot fluid import 7 and cold fluid import 8, the heat exchanger tube upper/lower terminal in the heat exchanger is equipped with screen cloth 2 and screen cloth 6 respectively.Heat exchanger tube is spirality heat exchanger tube 3 or the heat exchanger tube of placing the spring-like guiding device in plain tube, and the heat exchanger tube of two kinds of forms is built-in with inert solid particle 4.
Described inert solid particle 4 is that quartz sand particle or the granule heavier than fluid all can.
Operation principle of the present invention:
Adopt a kind of spiral heat exchange tube 3 (or in plain tube, placing the guiding device of spring-like), the vertical placement, some inert solid particles 4 (as quartz sand particle) are arranged in the heat exchanger tube, when pyroreaction thing (DMF) liquid passed through this heat exchanger tube, quartz sand particle was fluidized and is suspended in wherein.Because heat exchanger tube is a helical form, 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 heat-transfer surface, to be subjected to this bump and break away from wall, finally be taken out of heat exchanger, can keep the heat-transfer surface cleaning like this by fluid, heat exchanger can be not blocked, because solid particle bump wall has been upset heat transfer boundary layer, heat-transfer effect is further enhanced simultaneously.
The above-mentioned specific 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, heat exchanger anti-blocking method during the N dimethyl formamide is produced, it is characterized in that: adopt a kind of spiral heat exchange tube in the heat exchanger, the vertical placement, heat exchanger tube is built-in with some inert solid particles, when pyroreaction thing liquid passed through this heat exchanger tube, inert solid particle was fluidized and is suspended in the heat exchanger tube.Because heat exchanger tube is a helical form, 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 heat-transfer surface, to be subjected to this bump and break away from the tube wall face, finally be taken out of heat exchanger, can keep the heat-transfer surface cleaning like this by fluid, heat exchanger can be not blocked, because solid particle bump wall has been upset heat transfer boundary layer, heat-transfer effect is improved simultaneously.
2, a kind of N, anti-blocking heat exchanger during the N dimethyl formamide is produced, comprise the heat exchanger that has hot fluid outlet, cold fluid outlet, hot fluid import and cold fluid import, heat exchanger tube upper/lower terminal in the heat exchanger is equipped with screen cloth respectively, it is characterized in that: described heat exchanger tube is the spirality heat exchanger tube, and the spirality heat exchanger tube is built-in with inert solid particle.
3, a kind of N according to claim 2, the anti-blocking heat exchanger 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 |
|---|---|---|---|
| CN 200610052924 CN1908569A (en) | 2006-08-14 | 2006-08-14 | Method for heat exchanger anti-blocking in N,N-dimethyl formamide production process and anti-blocking heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610052924 CN1908569A (en) | 2006-08-14 | 2006-08-14 | Method for heat exchanger anti-blocking in N,N-dimethyl formamide production process and anti-blocking heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1908569A true CN1908569A (en) | 2007-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610052924 Pending CN1908569A (en) | 2006-08-14 | 2006-08-14 | Method for heat exchanger anti-blocking in N,N-dimethyl formamide production process and anti-blocking heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1908569A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102641601A (en) * | 2011-02-16 | 2012-08-22 | 俞天翔 | In-tube auto-cleaning antiscale falling-film evaporation device |
| CN115106025A (en) * | 2022-05-30 | 2022-09-27 | 安阳九天精细化工有限责任公司 | Environment-friendly and energy-saving production device and production method of dimethylformamide |
-
2006
- 2006-08-14 CN CN 200610052924 patent/CN1908569A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102641601A (en) * | 2011-02-16 | 2012-08-22 | 俞天翔 | In-tube auto-cleaning antiscale falling-film evaporation device |
| CN102641601B (en) * | 2011-02-16 | 2014-02-12 | 俞天翔 | In-tube auto-cleaning antiscale falling-film evaporation device |
| CN115106025A (en) * | 2022-05-30 | 2022-09-27 | 安阳九天精细化工有限责任公司 | Environment-friendly and energy-saving production device and production method of dimethylformamide |
| CN115106025B (en) * | 2022-05-30 | 2023-08-18 | 安阳九天精细化工有限责任公司 | Environment-friendly and energy-saving dimethylformamide production device and production method |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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