CN213446917U - Dimethyl formamide (DMF) waste liquid recycling device - Google Patents
Dimethyl formamide (DMF) waste liquid recycling device Download PDFInfo
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- CN213446917U CN213446917U CN202021663996.1U CN202021663996U CN213446917U CN 213446917 U CN213446917 U CN 213446917U CN 202021663996 U CN202021663996 U CN 202021663996U CN 213446917 U CN213446917 U CN 213446917U
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Abstract
The utility model provides a dimethyl formamide (DMF) waste liquid regeneration utilizes device: the device consists of a pump set A, a heater A, a rectifying tower, a heater B, a semi-finished product tank, a waste liquid tank, a pump set B, a buffer tank, a pump set C, a vacuum system, a cooler, a finished product tank and a pipeline. The working principle of the device is mainly that different distillation ranges of components in a dimethyl formamide waste liquid mixture are utilized, the evaporator taking the rectifying tower as a main body is used for regenerating a new equipment structure form of the dimethyl formamide waste liquid, the dimethyl formamide is purified from the mixture for reutilization through condensation after reduced pressure heating distillation, the main process is dehydration, the treatment process is a low-temperature distillation process, and the device is a physical process and cannot damage the original quality and the tissue structure of the dimethyl formamide.
Description
Technical Field
The utility model belongs to the technical field of energy-concerving and environment-protective useless solvent treatment, concretely relates to dimethyl formamide (DMF) waste liquid recycle device.
Background
1. Dimethylformamide (DMF) is a transparent liquid, miscible with water and most organic solvents. It is a common solvent for chemical reactions. Commercial grade dimethylformamide is fishy because it contains dimethylamine impurities. The name comes from the fact that it is a dimethyl substituent of formamide (the amide of formic acid), while both methyl groups are located on the N (nitrogen) atom. Dimethylformamide is a polar (hydrophilic) aprotic solvent with a high boiling point and promotes the progress of the SN2 reaction mechanism. Dimethylformamide is produced from methyl formate and dimethylamine.
2. Physical and chemical properties: colorless, light ammonia-smelling liquid. Molecular formula C3H7NO, molecular weight 73.10, relative density 0.9445(25 deg.C), melting point-61 deg.C, boiling point 152.8 deg.C, and flash point 57.78 deg.C. The vapor density is 2.51, the vapor pressure is 0.49kpa (3.7mmHg 25 ℃), and the self-ignition point is 445 ℃. Refractive index 1.42817, solubility parameter δ 12.1. Miscible with water and usually organic solvents, and mixed with petroleum ether for demixing.
3. At present, domestic waste dimethylformamide is recycled, no special large-scale complete equipment is available, and a large amount of dimethylformamide cannot be recycled. The new device invented by my company can make up for this deficiency. The same applies to large amounts.
SUMMERY OF THE UTILITY MODEL
First, the waste mixed liquid of dimethyl formamide to be distilled is connected to the left end of a pump set A1, a pipeline L is connected from the right end of the pump set A1 by a flange, and the waste mixed liquid of dimethyl formamide is connected to a waste liquid inlet of a heater A2 at one end through the pipeline L.
After heating, the other end of the heater A2 is connected to the rectifying tower 3 through the pipeline L, at the moment, a part of the dimethyl formamide mixed waste liquid with short carbon chain is changed into a gaseous state, the upper end of the rectifying tower 3 is connected with the pipeline L through a flange, the part of the dimethyl formamide mixed waste liquid is connected to the inlet end of the buffer tank 8 through the pipeline L to obtain a buffer memory, the lower end of the buffer tank 8 is connected with the left end of the pump unit C9, and the right end of the pump unit C9 is connected with the oil return inlet of the rectifying tower 3 through the pipeline L to achieve the backflow function.
Is heated again in the heater B4, and is buffered by connecting the lower end of the heater B4 with the upper inlet of the semi-finished product tank 5.
The right side of the semi-finished product tank 5 is connected with a left inlet of a pump set B7, and a right outlet of the pump set B7 is connected with a left upper inlet of the rectifying tower 3.
The lower end of the semi-finished product tank 5 is connected with the upper inlet of the waste liquid tank 6 and collected in the waste liquid tank 6.
Most of the gas phase distilled from the mixed waste liquid of dimethyl formamide passes through the upper end of the cooler 11, and after cooling, the lower end of the cooler 11 is connected with the upper end inlet of the finished product tank 12 to be recovered.
Because the entire system is operated under vacuum, the vacuum system 10 provides vacuum assurance to the system. The pipe L is connected to the vacuum outlet, and the pipe L is connected to the vacuum inlet of the cooler 11.
Drawings
FIG. 1 is a flow chart of a new process for purifying and regenerating waste dimethylformamide liquid.
The device comprises a pump set A1, a heater A2, a rectifying tower 3, a heater B4, a semi-finished product tank 5, a waste liquid tank 6, a pump set B7, a buffer tank 8, a pump set C9, a vacuum system 10, a cooler 11, a finished product tank 12 and a pipeline L.
FIG. 2 is a connection diagram of a new device for purifying and regenerating the waste liquid of dimethyl formamide.
Detailed Description
The new equipment structure form of the dimethyl formamide waste liquid is regenerated and utilized by an evaporator taking a rectifying tower as a main body:
the working principle of the device is mainly that different distillation ranges of all components in the dimethyl formamide waste liquid mixture are utilized, and the dimethyl formamide is purified from the mixture for reutilization through condensation after reduced pressure heating distillation. The main process is dehydration, the treatment process is a low-temperature distillation process, and the physical process does not damage the original quality and tissue structure of the dimethylformamide.
Because entire system moves under the vacuum, improves factor of safety greatly, and vacuum apparatus can take out the waste gas that produces in the regeneration process simultaneously, discharges up to standard after tail gas treatment, and the environmental protection operation does not have secondary pollution.
A device for recycling dimethyl formamide (DMF) waste liquid comprises a pump unit A1, a heater A2, a rectifying tower 3, a heater B4, a semi-finished product tank 5, a waste liquid tank 6, a pump unit B7, a buffer tank 8, a pump unit C9, a vacuum system 10, a cooler 11, a finished product tank 12 and a pipeline L.
The method is characterized in that: the pump set A is provided with a flange and is connected with the front end of a heater A2 through a pipeline L, and an outlet at the lower side of the heater A2 is connected with the upper front part of the rectifying tower 3.
The upper side of the rectifying tower 3 is connected with the upper front part of the buffer tank 8, the lower part of the buffer tank 8 is connected with the upper part of the pump group C9, and the lower part of the pump group C9 is pumped out and connected with the side upper part of the rectifying tower 3.
The lower part of the rectifying column 3 is connected to the upper part of the heater B4, and the lower part of the heater B4 is connected to the upper part of the intermediate tank 5 after being reheated.
The side of the semi-finished product tank 5 is connected to the left inlet of a pump set B7 through a pipeline L, and the right outlet of the pump set B7 is connected to the upper side of the rectifying tower 3.
The part right below the semi-finished product tank is connected to the upper end of the waste liquid tank 6 and collected in the waste liquid tank 6.
According to the characteristics of the material, the flash point is low, the volatility is high, the upper side of the rectifying tower 3 is connected with the upper part of the cooler 11, the lower rear part of the cooler 11 is connected with the upper front part of the finished product tank 12, and the liquid finished product is collected into the tank. The sealing performance is good when the plane part of the tank body is connected, and liquid is not easy to leak, thereby avoiding the occurrence of danger.
The upper front of the vacuum system 10 is connected with the lateral rear of the cooler 11 through a flange and a pipeline L.
Claims (1)
1. A Dimethylformamide (DMF) waste liquid recycling device is characterized in that: the device comprises a pump set A (1), a heater A (2), a rectifying tower (3), a heater B (4), a semi-finished product tank (5), a waste liquid tank (6), a pump set B (7), a buffer tank (8), a pump set C (9), a vacuum system (10), a cooler (11), a finished product tank (12) and a pipeline (L);
the pump set A (1) is provided with a flange and is connected with the front end of the heater A (2) through a pipeline (L), and an outlet at the lower side of the heater A (2) is connected with the upper front part of the rectifying tower (3);
the upper side of the rectifying tower (3) is connected with the upper part of a cooler (11), and the lower rear part of the cooler (11) is connected with the upper front part of a finished product tank (12); the upper side of the rectifying tower (3) is connected with the upper front part of a buffer tank (8), the lower part of the buffer tank (8) is connected with the upper part of a pump set C (9), and the lower part of the pump set C (9) is pumped out and connected to the side upper part of the rectifying tower (3); the lower part of the rectifying tower (3) is connected with the upper part of a heater B (4), and the lower part of the heater B (4) is connected with the upper part of a semi-finished product tank (5) after being reheated;
the side of the semi-finished product tank (5) is connected to the left inlet of a pump set B (7) through a pipeline (L), and the right outlet of the pump set B (7) is connected to the upper side of the rectifying tower (3); the right lower part of the semi-finished product tank (5) is connected to the upper end of the waste liquid tank (6) and collected in the waste liquid tank (6);
the upper front part of the vacuum system (10) is connected with the lateral rear part of the cooler (11) through a flange and a pipeline (L).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021663996.1U CN213446917U (en) | 2020-08-05 | 2020-08-05 | Dimethyl formamide (DMF) waste liquid recycling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021663996.1U CN213446917U (en) | 2020-08-05 | 2020-08-05 | Dimethyl formamide (DMF) waste liquid recycling device |
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| CN213446917U true CN213446917U (en) | 2021-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021663996.1U Active CN213446917U (en) | 2020-08-05 | 2020-08-05 | Dimethyl formamide (DMF) waste liquid recycling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2020
- 2020-08-05 CN CN202021663996.1U patent/CN213446917U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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