CN220531526U - Dimethylformamide reactor for preventing bottom crystals from gathering - Google Patents
Dimethylformamide reactor for preventing bottom crystals from gathering Download PDFInfo
- Publication number
- CN220531526U CN220531526U CN202322055602.4U CN202322055602U CN220531526U CN 220531526 U CN220531526 U CN 220531526U CN 202322055602 U CN202322055602 U CN 202322055602U CN 220531526 U CN220531526 U CN 220531526U
- Authority
- CN
- China
- Prior art keywords
- reactor
- dimethylformamide
- crystals
- gas
- gas distributor
- 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.)
- Active
Links
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 239000013078 crystal Substances 0.000 title claims abstract description 24
- 239000007921 spray Substances 0.000 claims description 10
- 238000004220 aggregation Methods 0.000 claims description 5
- 230000002776 aggregation Effects 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 238000009825 accumulation Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 21
- 239000007788 liquid Substances 0.000 abstract description 7
- 239000004280 Sodium formate Substances 0.000 abstract description 5
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 abstract description 5
- 235000019254 sodium formate Nutrition 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 51
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 8
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 229910002091 carbon monoxide Inorganic materials 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The utility model provides a dimethylformamide reactor for preventing bottom crystals from gathering. The dimethylformamide reactor can effectively prevent crystals such as sodium formate from accumulating at the bottom of the reactor, and simultaneously promote the gas-liquid contact reaction to be more uniform, thereby being beneficial to improving the reaction efficiency, reducing the energy consumption and reducing the process cost.
Description
Technical Field
The utility model relates to the field of reactors for gas-liquid contact reactions, in particular to a dimethylformamide reactor for preventing bottom crystals from gathering.
Background
At present, dimethylformamide used in the fields of chemical industry, medicine and the like is mainly synthesized by utilizing sufficient carbon monoxide to react with dimethylamine in a reactor under the catalysis of sodium methoxide. Carbon monoxide is sprayed by a gas sprayer and flows upwards from the bottom of the reactor, and is fully contacted with dimethylamine and sodium methoxide, the reaction is exothermic, and in order to maintain the equilibrium temperature of the reaction temperature in the reaction system, a cooler is usually arranged outside the reactor, so that the reaction heat generated by the reaction system is timely taken away.
The cooler mainly exchanges heat through the shell and tube heat exchanger, and partial cold is uneven along with the progress of the reaction, so that sodium carbonate and sodium formate crystals generated in a reaction system are easily accumulated at the bottom of the reactor, and the more accumulated, the more the flow rate of carbon monoxide is reduced, the reaction efficiency is reduced, and equipment and pipelines are blocked. After sodium carbonate and sodium formate crystals enter a pipeline, the sodium carbonate and sodium formate crystals are easy to scale on the pipe wall, so that the cleaning frequency of reaction equipment is increased, the production stability of the whole process is influenced, the operation cost is increased, and the control of the process cost is not facilitated.
Disclosure of Invention
In order to solve the problems that crystals are easy to gather at the bottom of the reactor and scale is formed on the pipe wall in the prior art, the utility model provides a dimethylformamide reactor for preventing the bottom crystals from gathering.
The technical scheme of the utility model is realized as follows:
a dimethylformamide reactor for preventing bottom crystals from gathering is characterized in that the bottom of the reactor is provided with a conical end socket, a bottom gas distributor is arranged at the conical end socket, and bottom gas nozzles which are uniformly staggered are arranged on the bottom gas distributor.
Preferably, trays are uniformly staggered at the upper part of the reactor, and an s-shaped channel is formed between the trays from top to bottom.
Preferably, two layers of lower gas distributors are arranged at the lower part of the reactor, the two lower gas distributors are communicated through a conduit, and each lower gas distributor is provided with a plurality of lower gas spray heads; the lower gas distributor is in communication with the bottom gas distributor via a conduit.
Preferably, the angle of the conical end socket is set to 60 degrees.
Preferably, the bottom gas distributor is in a straight pipe shape, and two sides of the conical sealing head are oppositely provided with the bottom gas distributor.
Preferably, the lower gas distributor is provided in the shape of concentric circular tubes.
Preferably, a tail gas outlet is arranged at the top of the reactor and is used for being communicated with a tail gas absorption tower.
The beneficial effects of the utility model are as follows: according to the dimethylformamide reactor for preventing the bottom crystals from gathering, the conical sealing head at the bottom of the reactor, the bottom gas distributor and the bottom gas spray head are arranged on the conical sealing head, so that the crystals such as sodium formate can be effectively prevented from accumulating at the bottom of the reactor, the gas-liquid contact reaction is promoted to be more uniform, the reaction efficiency is improved, the energy consumption is reduced, and the process cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of a dimethylformamide reactor for preventing aggregation of crystals at the bottom of the reactor according to the present utility model.
In the figure:
1. a reactor; 2. a bottom gas distributor; 3. a bottom gas shower; 4. a tray; 5. a lower gas distributor; 6. a conduit; 7. a lower gas shower; 8. a tail gas outlet; 11. and (5) a conical sealing head.
Description of the embodiments
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Examples: as shown in fig. 1, the bottom of the reactor 1 is provided with a conical end enclosure 11, the conical end enclosure 11 is provided with a bottom gas distributor 2, and the bottom gas distributor 2 is provided with uniformly staggered bottom gas spray heads 3. The upper part of the reactor 1 is uniformly and alternately provided with trays 4, and s-shaped channels are formed between the trays from top to bottom. The lower part of the reactor 1 is provided with two layers of lower gas distributors 5, the two lower gas distributors are communicated through a conduit 6, each lower gas distributor 5 is provided with a plurality of lower gas spray heads 7, and the lower gas distributors 5 are communicated with the bottom gas distributor 2 through the conduit. The bottom gas distributor 2 is arranged in a straight pipe shape, and the two sides of the conical sealing head 11 are oppositely provided with the bottom gas distributor 2. The lower gas distributor 5 is arranged in the shape of concentric circular loops. The top of the reactor is provided with a tail gas outlet 8 which is used for communicating with a tail gas absorption tower.
The conical end socket has the function of reducing the accumulation of crystals at the bottom and blocking the equipment pipeline. The angle of the conical end socket is set to be 60 degrees, the conical end socket is too small in angle and is not suitable for the reaction of slurry crystals in the reaction process of producing dimethylformamide, and the effect of reducing the accumulation of the crystals cannot be achieved due to the too large angle.
The using mode is as follows: the reaction material dimethylamine and methanol solution containing catalyst sodium methoxide enter an S-shaped channel formed by tower plates from the upper side end of the reactor, carbon monoxide gas enters a lower distributor and a bottom gas distributor of the reactor through a conduit, and is sprayed and diffused through lower gas spray heads of the two layers of lower distributors and bottom gas spray heads of the bottom distributor respectively, gas-liquid reaction is carried out at the lower part of the reactor, unreacted carbon monoxide gas continuously contacts and reacts with dimethylamine and sodium methoxide entering from the upper part of the reactor through the S-shaped channel, and unreacted inert gas is discharged from a tail gas outlet at the top of the reactor to a tail gas absorption tower.
The lower gas distributor is arranged in two layers, each layer is arranged in a concentric circular ring pipe shape, lower gas spray heads of the lower gas distributor of each layer are distributed in a staggered manner, and the contact area of gas and liquid is increased, so that the gas and the liquid are fully mixed. Compared with other shapes, the concentric circular pipe shape increases the number of the pipeline turns on the same section, thereby increasing the number of the lower gas spray heads, ensuring that the lower gas spray heads in the reactor are distributed more uniformly, ensuring that the gas-liquid contact reaction is more complete and improving the reaction efficiency. The S-shaped channel formed by the tower plates at the upper part of the reactor can improve the gas distribution condition in the tower and is beneficial to improving the reaction efficiency.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (7)
1. A dimethylformamide reactor for preventing bottom crystals from gathering is characterized in that the bottom of the reactor is provided with a conical end socket, a bottom gas distributor is arranged at the conical end socket, and bottom gas nozzles which are uniformly staggered are arranged on the bottom gas distributor.
2. The dimethylformamide reactor for preventing aggregation of crystals at the bottom according to claim 1, wherein trays are uniformly staggered at the upper part of the reactor, and s-shaped channels are formed between the trays from top to bottom.
3. The dimethylformamide reactor for preventing aggregation of bottom crystals according to claim 1, wherein the lower part of the reactor is provided with two layers of lower gas distributors which are communicated through a conduit, and each lower gas distributor is provided with a plurality of lower gas spray heads; the lower gas distributor is in communication with the bottom gas distributor via a conduit.
4. The dimethylformamide reactor for preventing aggregation of crystals at a bottom according to claim 1, wherein the angle of the tapered head is set to 60 degrees.
5. The dimethylformamide reactor for preventing accumulation of crystals at a bottom according to claim 1, wherein the bottom gas distributor is provided in a straight pipe shape, and two sides of the tapered head are oppositely provided with the bottom gas distributor.
6. A dimethylformamide reactor for preventing accumulation of crystals at a bottom according to claim 3, wherein the lower gas distributor is provided in the shape of concentric circular tubes.
7. A dimethylformamide reactor for preventing aggregation of crystals at the bottom according to claim 3, wherein a tail gas outlet is provided at the top of the reactor, and the tail gas outlet is used for communicating with a tail gas absorption tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322055602.4U CN220531526U (en) | 2023-08-02 | 2023-08-02 | Dimethylformamide reactor for preventing bottom crystals from gathering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322055602.4U CN220531526U (en) | 2023-08-02 | 2023-08-02 | Dimethylformamide reactor for preventing bottom crystals from gathering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220531526U true CN220531526U (en) | 2024-02-27 |
Family
ID=89969171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322055602.4U Active CN220531526U (en) | 2023-08-02 | 2023-08-02 | Dimethylformamide reactor for preventing bottom crystals from gathering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220531526U (en) |
-
2023
- 2023-08-02 CN CN202322055602.4U patent/CN220531526U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101511463B (en) | Isothermal reactor | |
| CN105032305A (en) | Novel radial plate type reactor | |
| US11407698B2 (en) | Synthesis method for highly selective 2-methylallyl chloride and synthesis reactor thereof | |
| CN104801240A (en) | Plate type heat exchange reactor | |
| CN105536654A (en) | Large-scale axial multistage-mixing heat exchange type oxydehydrogenation reactor for butylene | |
| CN203355710U (en) | Rapid fluidized bed reactor for producing butadiene by butylene oxydehydrogenation | |
| CN204093422U (en) | A kind of dimethyl formamide reactor and corollary equipment | |
| CN220531526U (en) | Dimethylformamide reactor for preventing bottom crystals from gathering | |
| CN105833802A (en) | Steam rising type catalyst bed reactor | |
| CN100386138C (en) | Process and equipment for internal heat exchanging catalytic reaction | |
| CN110201624A (en) | A kind of contiguous segmentation charging reactor for synthetic reaction | |
| CN116651329A (en) | Gas distributor and bubble column of double-ring distribution pipe of anti-backflow | |
| CN215139719U (en) | Nitrogen oxide reaction tower | |
| CN204933424U (en) | A kind of novel radial plate-type reactor | |
| CN216419330U (en) | Novel falling film reactor | |
| CN204724141U (en) | A kind of plate-type heat-exchange reactor | |
| CN104387258B (en) | A kind of production of chloroacetic acid method and chlorination reactor | |
| CN116020350A (en) | Reactor for synthesizing carbonic ester, system and method for synthesizing carbonic ester | |
| CN203494494U (en) | Tubular fixed bed reactor applicable to synthesis of vinyl acetate | |
| CN209885777U (en) | Guide cylinder type vinyl ether product reactor | |
| CN207271220U (en) | A kind of temperature control gas-solid horizontal reactor for having distributor | |
| CN205672884U (en) | Steam ascending manner catalytic bed reactor | |
| CN211345270U (en) | Cooling device in acrylic acid production process | |
| CN111111566A (en) | Packed tower reactor for producing cyclic carbonate and production method | |
| RU2380149C2 (en) | Method of regulating temperature of exorthermic catalytic reactions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |