CN217972640U - DMF waste water rectifying device - Google Patents
DMF waste water rectifying device Download PDFInfo
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- CN217972640U CN217972640U CN202221544907.0U CN202221544907U CN217972640U CN 217972640 U CN217972640 U CN 217972640U CN 202221544907 U CN202221544907 U CN 202221544907U CN 217972640 U CN217972640 U CN 217972640U
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Abstract
The utility model discloses a DMF waste water rectifier unit, including dehydration tower and refining tower: the top of the tower of dehydration tower is provided with first cooling entrapment subassembly, and first cooling entrapment subassembly and dehydration tower end to end cyclic connection, the pipeline passes through the machine pump and is connected with the refining tower at the bottom of the tower of dehydration tower, the top of the tower of refining tower is provided with second cooling entrapment subassembly, and second cooling entrapment subassembly and refining tower end to end cyclic connection. The utility model discloses in, this rectifier unit adopts the rectification mode of the continuous negative pressure of two towers, can separate the high-efficient and comprehensive rectification of the DMF material in the waste water to combine two independent cooling entrapment subassemblies, further people have improved the rectification separation efficiency of the DMF material in the waste water, prevent that the MDF material from remaining the discharge and causing the pollution of environment in the waste water, be favorable to the mill enterprise to carry out the rectification processing of scale to the DMF waste water.
Description
Technical Field
The utility model relates to a waste water treatment technical field especially relates to a DMF waste water rectifier unit.
Background
The rectifying tower is a tower type vapor-liquid contact device for rectifying. An apparatus for separating the components of a mixture. The gas phase and the liquid phase are contacted in a rectifying tower through countercurrent, and the interphase heat transfer and mass transfer are carried out. The waste material enters from the middle part of the rectifying tower and is distilled through the tower plate. Water vapor enters from the lower end of the rectifying tower, the water vapor is condensed into liquid at the upper end of the rectifying tower, and the rectifying tower is also needed to carry out rectification treatment on the DMF wastewater in the DMF wastewater treatment.
Chinese patent publication No.: CN212864613U discloses a synthetic leather wastewater treatment and DMF recovery system, which adopts four-stage negative pressure rectification and two-stage water vapor compressor series heat supply mode; preheating synthetic leather wastewater containing DMF, then feeding the synthetic leather wastewater into a vaporization tank, completely vaporizing the synthetic leather wastewater containing DMF in the vaporization tank, feeding the synthetic leather wastewater containing DMF into a first-stage dehydration tower in a gas-phase feeding manner for mass transfer separation, feeding the generated DMF, heavy component solution and formic acid into a second-stage rectification tower for mass transfer separation, conveying dimethylamine odor and the like formed by trace decomposition of the DMF in the second-stage rectification tower into water vapor, conveying the dimethylamine odor and the like out of the tower top of the second-stage rectification tower, pumping negative pressure by using a vacuum pump, taking condensed water vapor condensate as reflux liquid to flow back to the middle part of the dehydration tower, and conveying uncondensed gas of dimethylamine and the like to a tail gas treatment device. The DMF, the formic acid and the high-boiling residues at the bottom of the second-stage rectification tower enter a third-stage deacidification tower for mass transfer separation; the water vapor at the outlet of the first-stage water vapor compressor is used as a heat source for the vaporization tank; saturated steam at the outlet of the secondary steam compressor is used as a heat source of the deamination tower and the deacidification tower.
When the conventional wastewater rectification device rectifies DMF wastewater, due to the unstable flow rate of MDF wastewater, the rectification operation efficiency of the DMF wastewater is not high enough, and after rectification treatment, the concentration of the obtained DMF substance is not high enough, so that part of the DMF substance can be remained in the wastewater and discharged outwards, and the environment can be polluted.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an adopt two continuous negative pressure rectification's of tower mode, realize the high-efficient rectification effect of DMF waste water, the scale rectification processing's of being convenient for DMF waste water rectifier unit.
In order to achieve the above object, the present invention provides the following technical solutions: a DMF waste water rectification device comprises a dehydration tower and a rectification tower:
the tower top of the dehydration tower is provided with a first cooling trapping assembly, and the first cooling trapping assembly is circularly connected with the head and the tail of the dehydration tower;
the tower bottom pipeline of the dehydration tower is connected with the refining tower through a pump;
and a second cooling trapping assembly is arranged at the top of the refining tower and is in end-to-end circulating connection with the refining tower.
As a further description of the above technical solution:
the first cooling and trapping assembly comprises a first condenser and a first trap, the outlet end of the first condenser is connected with the inlet end of the first trap, the inlet end of the first condenser is connected with the dehydration tower, the outlet end of the first trap is connected with a first intermediate tank, and the first intermediate tank is connected with the dehydration tower.
As a further description of the above technical solution:
the first condenser and the first catcher are connected with a condensing system through condensed water pipelines, and the first catcher is connected with a vacuum system through a gas pipeline.
As a further description of the above technical solution:
the inlet end of the dehydration tower is connected with a preheater through a pipeline.
As a further description of the above technical solution:
the second cooling and trapping assembly comprises a second condenser and a second trap, the outlet end of the second condenser is connected with the inlet end of the second trap, the inlet end of the second condenser is connected with the refining tower, the outlet end of the second trap is connected with a second intermediate tank, and the second intermediate tank is connected with the refining tower.
As a further description of the above technical solution:
the second condenser and the second trap are connected with a condensing system through condensed water pipelines, and the second trap is connected with a vacuum system through a gas pipeline.
As a further description of the above technical solution:
the tower bottom of the dehydration tower is connected with a first reboiler.
As a further description of the above technical solution:
and the tower bottom of the refining tower is connected with a second reboiler.
In the technical scheme, the utility model provides a pair of DMF waste water rectifier unit has following beneficial effect:
this rectifier unit adopts the rectification mode of the continuous negative pressure of two towers, can separate the high-efficient and comprehensive rectification of the DMF material in the waste water to combine two independent cooling entrapment subassemblies, further people have improved the rectification separation efficiency of the DMF material in the waste water, prevent that the MDF material from remaining the discharge in the waste water and causing the pollution of environment, be favorable to the factory enterprise to carry out the rectification processing of scale to the DMF waste water.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.
FIG. 1 is a schematic structural diagram of a DMF wastewater rectification apparatus provided by an embodiment of the present invention.
Description of reference numerals:
1. a preheater; 2. a dehydration tower; 3. a first condenser; 4. a first trap; 5. a first intermediate tank; 6. a first reboiler; 7. a machine pump; 8. a refining tower; 9. a second condenser; 10. a second trap; 11. a second intermediate tank; 12. a second reboiler.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the attached drawings.
As shown in fig. 1, a DMF wastewater rectification apparatus comprises a dehydration tower 2 and a refining tower 8:
the top of the dehydration tower 2 is provided with a first cooling trapping assembly, the first cooling trapping assembly is circularly connected with the dehydration tower 2 end to end, the pressure of the top of the dehydration tower 2 is-0.08 MPa, the temperature of the bottom of the tower is controlled at 80 ℃, the temperature of the top of the tower is 45 ℃, materials at the top of the tower are treated by a first cooling trapping assembly Leng Ming, the temperature of the top of the tower is controlled by a reflux mode, waste water is extracted at the top of the tower, and DMF with higher amount is extracted at the bottom of the dehydration tower 2 and enters a refining tower 8 through a pump 7;
the tower bottom pipeline of the dehydration tower 2 is connected with the refining tower 8 through a pump 7, so that the wastewater mixture in the dehydration tower 2 can be pressurized and guided into the refining tower 8, and the continuous negative pressure flow effect of the two towers is realized;
the top of the refining tower 8 is provided with a second cooling and trapping assembly, the second cooling and trapping assembly is circularly connected with the end of the refining tower 8, the bottom of the refining tower 8 is heavy components, the DMF content at the top of the tower is less than or equal to 500ppm, materials at the top of the tower are extracted and refluxed through high level liquid difference after being cooled by the second cooling and trapping assembly, the purity of the extracted products is more than or equal to 99.5 percent, the negative pressure at the top of the refining tower 8 is-0.06 MPa, the temperature at the bottom of the tower is 95 ℃, the temperature at the bottom of the tower is 115 ℃, impurities containing the heavy components are at the bottom of the tower, and kettle residues are discharged at regular time.
The first cooling trapping assembly comprises a first condenser 3 and a first trap 4, the outlet end of the first condenser 3 is connected with the inlet end of the first trap 4, the inlet end of the first condenser 3 is connected with the dehydrating tower 2, the outlet end of the first trap 4 is connected with a first intermediate tank 5, the first intermediate tank 5 is connected with the dehydrating tower 2, the first condenser 3 and the first trap 4 are connected with a condensing system through a condensed water pipeline, the first trap 4 is connected with a vacuum system through a gas pipeline, materials on the top of the dehydrating tower 2 firstly enter the first condenser 3, the materials are cooled through circulating flowing condensed water, and then the condensed materials are guided into the first intermediate tank 5 under the action of the first trap 4 and flow into the top of the dehydrating tower 2 in a backflow mode.
The entrance point of dehydration tower 2 has pre-heater 1 through the pipe connection, is provided with the booster pump on the pipeline of pre-heater 1 intake side for play the pressure boost effect to waste water, make in the inflow pre-heater 1 that the DMF waste water can be stable, and enter into in the dehydration tower 2.
The second cooling and trapping assembly comprises a second condenser 9 and a second trap 10, the outlet end of the second condenser 9 is connected with the inlet end of the second trap 10, the inlet end of the second condenser 9 is connected with the refining tower 8, the outlet end of the second trap 10 is connected with a second intermediate tank 11, the second intermediate tank 11 is connected with the refining tower 8, the second condenser 9 and the second trap 10 are connected with a condensing system through a condensed water pipeline, the second trap 10 is connected with a vacuum system through a gas pipeline, materials on the top of the refining tower 8 firstly enter the second condenser 9 and are cooled through circulating flowing condensed water, then the condensed materials are guided into the second intermediate tank 11 under the action of the second trap 10 and flow into the top of the refining tower 8 in a backflow mode, and DMF substances of heavy components on the top of the tower are discharged outwards, so that the rectifying and separating effect of DMF is realized.
The first reboiler 6 is connected to the bottom of dehydration tower 2, can carry out reboiling heat treatment to the waste water that dehydration tower 2 bottom of the tower discharged, further improves the dehydration efficiency of DMF material.
The tower bottom of the refining tower 8 is connected with a second reboiler 12, which can carry out reboiling and heating treatment on the waste water discharged from the tower bottom of the refining tower 8, and further improve the rectification efficiency of DMF substances.
Certain exemplary embodiments of the present invention have been described above by way of illustration only, and it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive on the scope of the appended claims.
Claims (8)
1. The utility model provides a DMF waste water rectifier unit, includes dehydration tower (2) and rectifying column (8), its characterized in that:
the top of the dehydration tower (2) is provided with a first cooling and capturing assembly, and the first cooling and capturing assembly is circularly connected with the dehydration tower (2) end to end;
the tower bottom pipeline of the dehydration tower (2) is connected with a refining tower (8) through a pump (7);
and a second cooling and trapping assembly is arranged at the top of the refining tower (8), and the second cooling and trapping assembly is circularly connected with the end of the refining tower (8).
2. The DMF waste water rectification device according to claim 1, characterized in that: the first cooling and trapping assembly comprises a first condenser (3) and a first trap (4), the outlet end of the first condenser (3) is connected with the inlet end of the first trap (4), the inlet end of the first condenser (3) is connected with the dehydrating tower (2), the outlet end of the first trap (4) is connected with a first intermediate tank (5), and the first intermediate tank (5) is connected with the dehydrating tower (2).
3. The DMF waste water rectification device of claim 2, characterized in that: the first condenser (3) and the first catcher (4) are connected with a condensing system through condensed water pipelines, and the first catcher (4) is connected with a vacuum system through a gas pipeline.
4. The DMF waste water rectification device according to claim 1, characterized in that: the inlet end of the dehydration tower (2) is connected with a preheater (1) through a pipeline.
5. The DMF waste water rectification device according to claim 1, characterized in that: the second cooling trapping assembly comprises a second condenser (9) and a second trap (10), the outlet end of the second condenser (9) is connected with the inlet end of the second trap (10), the inlet end of the second condenser (9) is connected with the refining tower (8), the outlet end of the second trap (10) is connected with a second intermediate tank (11), and the second intermediate tank (11) is connected with the refining tower (8).
6. The DMF waste water rectification device according to claim 5, characterized in that: the second condenser (9) and the second trap (10) are connected with a condensing system through condensed water pipelines, and the second trap (10) is connected with a vacuum system through a gas pipeline.
7. The DMF waste water rectification device according to claim 1, characterized in that: the bottom of the dehydration tower (2) is connected with a first reboiler (6).
8. The DMF waste water rectification device according to claim 1, characterized in that: the tower bottom of the refining tower (8) is connected with a second reboiler (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221544907.0U CN217972640U (en) | 2022-06-20 | 2022-06-20 | DMF waste water rectifying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221544907.0U CN217972640U (en) | 2022-06-20 | 2022-06-20 | DMF waste water rectifying device |
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| Publication Number | Publication Date |
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| CN217972640U true CN217972640U (en) | 2022-12-06 |
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| CN202221544907.0U Active CN217972640U (en) | 2022-06-20 | 2022-06-20 | DMF waste water rectifying device |
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| CN (1) | CN217972640U (en) |
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- 2022-06-20 CN CN202221544907.0U patent/CN217972640U/en active Active
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