CN217627989U - Isopropyl alcohol effluent disposal system - Google Patents
Isopropyl alcohol effluent disposal system Download PDFInfo
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- CN217627989U CN217627989U CN202221697796.7U CN202221697796U CN217627989U CN 217627989 U CN217627989 U CN 217627989U CN 202221697796 U CN202221697796 U CN 202221697796U CN 217627989 U CN217627989 U CN 217627989U
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Abstract
The utility model belongs to the technical field of waste water recovery utilizes, concretely relates to isopropyl alcohol effluent disposal system, including one-level rectifying column and adsorption tower, one-level rectifying column middle part is connected with waste liquid input pipeline, the top of one-level rectifying column and the bottom intercommunication of adsorption tower, and the bottom intercommunication of one-level rectifying column has waste water pipeline, and the adsorption tower packing has modified molecular sieve, and modified molecular sieve's effective aperture is 3A-5A, and the top of adsorption tower communicates membrane filter. The utility model discloses on the basis that one-level rectifying column rectification made higher purity isopropyl alcohol (87%), through the high selectivity that modified molecular sieve in the adsorption tower has, the molecular sieve aperture is between isopropyl alcohol and hydrone, only adsorbs the hydrone, does not adsorb isopropyl alcohol to the moisture content of isopropyl alcohol has been reduced, isopropyl alcohol solvent purity has been improved. The utility model discloses no chemical reaction, process easy operation has evaded azeotropic distillation's fire safety, environmental pollution, occupational health harm risk.
Description
Technical Field
The utility model belongs to the technical field of waste water recovery utilizes, concretely relates to isopropyl alcohol effluent disposal system.
Background
The aqueous solution containing more isopropanol is directly treated by a wastewater system with high cost and causes biochemical resource waste. Due to the azeotropic effect of isopropanol and water, high-purity isopropanol cannot be obtained by ordinary distillation treatment, and only isopropanol with the azeotropic composition: water =87:13, the mixed solution cannot be directly used, and has low economic value. The prior process for separating isopropanol and water by adopting cyclohexane or toluene for azeotropic distillation has the defects of poor water carrying capacity and low efficiency as an entrainer because the azeotropic composition of cyclohexane and water is 10: 1. And the boiling point and the flash point of the cyclohexane are low, and the risk of flammability and explosiveness is high when the catalyst is used. Toluene belongs to chemicals easy to prepare toxic substances, has strict control, contains benzene rings, and has carcinogenic risk for operators.
SUMMERY OF THE UTILITY MODEL
To above-mentioned prior art not enough, the utility model provides an isopropyl alcohol effluent disposal system, the purpose is in order to solve the current technology that adopts cyclohexane or toluene azeotropic distillation separation isopropyl alcohol and water, but because the azeotropic composition of cyclohexane and water is 10 than 1, takes the water capacity poor, and is not high as entrainer efficiency. And the boiling point and the flash point of the cyclohexane are low, so that the risk of flammability and explosiveness is high when the catalyst is used. Toluene belongs to chemicals easy to prepare toxic substances, has strict control, contains benzene rings, and has the technical problem that operators have carcinogenic risks.
The utility model provides an isopropyl alcohol effluent disposal system, concrete technical scheme is as follows:
the isopropanol wastewater treatment system comprises a primary rectifying tower and an adsorption tower, wherein a waste liquid input pipeline is connected to the middle of the primary rectifying tower, the top of the primary rectifying tower is communicated with the bottom of the adsorption tower, a wastewater pipeline is communicated with the bottom of the primary rectifying tower, the adsorption tower is filled with a modified molecular sieve, the effective pore diameter of the modified molecular sieve is 3A-5A, and the top of the adsorption tower is communicated with a membrane filter.
In certain embodiments, the membrane filter is provided with a multi-stage filtration membrane, the filtration membrane having filtration pores that decrease with the direction of filtration.
Furthermore, the aperture of the filtration pores of the multistage filtration membrane is 0.2-10 μm.
In certain embodiments, a first condenser is arranged above the first-stage rectifying tower, an inlet of the first condenser is communicated with the top of the first-stage rectifying tower, and an outlet of the first condenser is respectively communicated with the top of the first-stage rectifying tower and the middle of the adsorption tower.
In certain embodiments, a first reboiler is disposed below the first-stage rectification column, and both an inlet and an outlet of the first reboiler are communicated with the bottom of the first-stage rectification column.
In certain embodiments, the system further comprises a secondary rectifying tower, wherein the bottom of the primary rectifying tower is communicated with the middle part of the secondary rectifying tower, the bottom of the secondary rectifying tower is communicated with the wastewater pipeline, and the top of the secondary rectifying tower is communicated with the bottom of the adsorption tower.
Further, a second condenser is arranged above the secondary rectifying tower, an inlet of the second condenser is communicated with the top of the secondary rectifying tower, and an outlet of the second condenser is communicated with the top of the secondary rectifying tower and the middle of the adsorption tower respectively.
And furthermore, a second reboiler is arranged below the secondary rectifying tower, and an inlet and an outlet of the second reboiler are communicated with the bottom of the secondary rectifying tower.
The utility model discloses following beneficial effect has: the utility model provides an isopropyl alcohol effluent disposal system, on the basis that one-level rectifying column rectification made higher purity isopropyl alcohol (87%), through the high selectivity that modified molecular sieve in the adsorption tower has, the molecular sieve aperture is between isopropyl alcohol and hydrone, only adsorbs the hydrone, does not adsorb isopropyl alcohol to the moisture content of isopropyl alcohol has been reduced, isopropyl alcohol solvent purity has been improved. The utility model has no chemical reaction and simple operation; the heat energy consumption of azeotropic distillation is not generated, extra azeotropic solvent is not introduced, and the influence of the azeotropic agent on the product is avoided; finally, isopropanol with the purity of more than 99.9 percent can be prepared; the adsorbent (modified molecular sieve) has long service life, can be regenerated and recycled, and reduces the cost; avoids the fire safety, environmental pollution and occupational health hazard risks of azeotropic distillation.
Drawings
FIG. 1 is a schematic structural diagram of an isopropanol wastewater treatment system provided by an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings 1.
Examples
The isopropyl alcohol wastewater treatment system provided by the embodiment has the following specific technical scheme:
isopropyl alcohol effluent disposal system, including one-level rectifying column 1 and adsorption tower 2, 1 middle part in one-level rectifying column is connected with waste liquid input pipeline 4, and the waste water that contains isopropyl alcohol is imported one-level rectifying column 1 by waste liquid input pipeline 4. The top of the first-stage rectifying tower 1 is communicated with the bottom of the adsorption tower 2, and products (87% of isopropanol and 13% of water) at the top of the first-stage rectifying tower 1 are input to the bottom of the adsorption tower 2. The bottom of the first-stage rectifying tower 1 is communicated with a wastewater pipeline 5, and bottom products can be directly discharged through the wastewater pipeline 5 for treatment. The adsorption tower 2 is filled with a modified molecular sieve, the effective aperture of the modified molecular sieve is 3A-5A, the aperture of the molecular sieve is between that of isopropanol and water molecules, and only water molecules are adsorbed without adsorbing the isopropanol, so that the water content of the isopropanol is reduced, the purity of an isopropanol solvent is improved, and the purity can reach more than 99%. The top of the adsorption tower 2 is communicated with a membrane filter 3. The liquid removed by the adsorption tower 2 may carry particulate matters out of the molecular sieve, and the particulate matters in the molecular sieve are removed by the membrane filter 3.
In this embodiment, the membrane filter 3 is provided with a multistage filtration membrane, and the filtration pores of the multistage filtration membrane are narrowed in accordance with the filtration direction. Is provided with a multistage filtering membrane, and particulate matters in the purified liquid are completely filtered along with the reduction of the filtering aperture, thereby ensuring the product quality.
In this example, the filtration pore diameter of the multistage filtration membrane was 0.2 to 10 μm. Thus, the particulate matter can be effectively filtered.
In this embodiment, a first condenser 11 is arranged above the first-stage rectifying tower 1, an inlet of the first condenser 11 is communicated with the top of the first-stage rectifying tower 1, and an outlet of the first condenser 11 is communicated with the top of the first-stage rectifying tower 1 and the middle of the adsorption tower 2 respectively. The first condenser 11 is used for condensing the vaporized material at the top of the first-stage rectifying tower 1, circulating the material back to the top of the first-stage rectifying tower 1, and partially conveying the material to the adsorption tower 2.
In this embodiment, a first reboiler 12 is disposed below the first-stage rectification tower 1, and an inlet and an outlet of the first reboiler 12 are both communicated with the bottom of the first-stage rectification tower 1. The first reboiler 12 is used for vaporizing the liquid at the bottom of the first-stage rectifying tower 1 again, and the liquid flows back to the bottom of the first-stage rectifying tower 1 so as to be discharged out of the tower through the waste water pipeline 5.
In the embodiment, the device further comprises a second-stage rectifying tower 6, the bottom of the first-stage rectifying tower 1 of the second-stage rectifying tower 6 is communicated with the middle part of the second-stage rectifying tower 6, the bottom of the second-stage rectifying tower 6 is communicated with a wastewater pipeline 5, and the top of the second-stage rectifying tower 6 is communicated with the bottom of the adsorption tower 2. The second-stage rectifying tower 6 can further recover a small amount of isopropanol in the bottom product in the first-stage rectifying tower 1, so that the top product of the second-stage rectifying tower 6 and the top product of the first-stage rectifying tower 1 are converged and flow to the adsorption tower 2, the water content of the bottom product of the second-stage rectifying tower 6 can reach more than 99.8%, and the bottom product is directly discharged through a wastewater pipeline 5 for treatment.
In this embodiment, the second condenser 51 is arranged above the second-stage rectifying tower 6, an inlet of the second condenser 51 is communicated with the top of the second-stage rectifying tower 6, and an outlet of the second condenser 51 is communicated with the top of the second-stage rectifying tower 6 and the middle of the adsorption tower 2 respectively. The second condenser 51 is used for condensing the material vaporized at the top of the second-stage rectifying tower 6, circulating the material back to the top of the second-stage rectifying tower 6, and partially conveying the material to the adsorption tower 2.
In this embodiment, a second reboiler 62 is disposed below the second-stage rectification column 6, and an inlet and an outlet of the second reboiler 62 are both communicated with the bottom of the second-stage rectification column 6. The second reboiler 62 is used for vaporizing the liquid at the bottom of the second-stage rectification column 6 again, and the liquid flows back to the bottom of the second-stage rectification column 6 and is conveniently discharged out of the column through the wastewater pipeline 5.
The embodiment provides an isopropanol wastewater treatment system, which comprises the following general flow:
isopropanol wastewater is input into a first-stage rectifying tower 1 from a waste liquid input pipeline 4 for rectification, top products (87% isopropanol and 13% water) of the first-stage rectifying tower 1 are input into the bottom of an adsorption tower 2, the top products of the first-stage rectifying tower 1 are input into a second-stage rectifying tower 6, the second-stage rectifying tower 6 can further recover a small amount of isopropanol in bottom products of the first-stage rectifying tower 1, so that the top products of the second-stage rectifying tower 6 and the top products of the first-stage rectifying tower 1 are converged and flow to the adsorption tower 2, and the bottom products of the second-stage rectifying tower 6 are directly discharged through a waste water pipeline 5 for treatment. The adsorption tower 2 is subjected to dehydration treatment and then is treated by a membrane filter 3 to obtain high-purity isopropanol (the concentration reaches more than 99%).
To sum up, the utility model provides an isopropyl alcohol effluent disposal system, on the basis that the rectification of one-level rectifying column 1 made higher purity isopropyl alcohol (87%), through the high selectivity that modified molecular sieve in adsorption tower 2 has, the molecular sieve aperture is between isopropyl alcohol and hydrone, only adsorbs the hydrone, does not adsorb isopropyl alcohol to the moisture content of isopropyl alcohol has been reduced, isopropyl alcohol solvent purity has been improved. The utility model has no chemical reaction and simple operation; the heat energy consumption of azeotropic distillation is not generated, extra azeotropic solvent is not introduced, and the influence of the azeotropic agent on the product is avoided; finally, isopropanol with the purity of more than 99.9 percent can be prepared; the adsorbent (modified molecular sieve) has long service life, can be regenerated and recycled, and reduces the cost; avoids the fire safety, environmental pollution and occupational health hazard risks of azeotropic distillation.
The above-mentioned only the utility model discloses the feasible embodiment of preferred is not right the utility model discloses a restriction, the utility model discloses also not be limited to the above-mentioned example, technical field's technical personnel the utility model discloses an in the essential scope, change, modification, interpolation or replacement made also should belong to the utility model discloses a protection scope.
Claims (8)
1. The isopropanol wastewater treatment system is characterized by comprising a primary rectifying tower and an adsorption tower, wherein the middle part of the primary rectifying tower is connected with a waste liquid input pipeline, the top of the primary rectifying tower is communicated with the bottom of the adsorption tower, the bottom of the primary rectifying tower is communicated with a waste water pipeline, the adsorption tower is filled with a modified molecular sieve, the effective pore diameter of the modified molecular sieve is 3A-5A, and the top of the adsorption tower is communicated with a membrane filter.
2. The isopropanol wastewater treatment system of claim 1, wherein the membrane filter is provided with a plurality of stages of filtration membranes, and the filtration pores of the plurality of stages of filtration membranes are reduced along with the filtration direction.
3. The isopropanol wastewater treatment system as set forth in claim 2, wherein the filtration pores of the multistage filtration membrane have a pore size of 0.2 to 10 μm.
4. The isopropanol wastewater treatment system of claim 1, wherein a first condenser is arranged above the primary rectifying tower, an inlet of the first condenser is communicated with the top of the primary rectifying tower, and an outlet of the first condenser is respectively communicated with the top of the primary rectifying tower and the middle of the adsorption tower.
5. The isopropanol wastewater treatment system as set forth in claim 1, wherein a first reboiler is arranged below the primary rectification column, and an inlet and an outlet of the first reboiler are both communicated with the bottom of the primary rectification column.
6. The isopropanol wastewater treatment system of claim 1, further comprising a secondary rectification column, wherein the bottom of the primary rectification column of the secondary rectification column is communicated with the middle part of the secondary rectification column, the bottom of the secondary rectification column is communicated with the wastewater pipeline, and the top of the secondary rectification column is communicated with the bottom of the adsorption column.
7. The isopropanol wastewater treatment system of claim 6, wherein a second condenser is arranged above the secondary rectification tower, an inlet of the second condenser is communicated with the top of the secondary rectification tower, and an outlet of the second condenser is respectively communicated with the top of the secondary rectification tower and the middle of the adsorption tower.
8. The isopropanol wastewater treatment system of claim 6, wherein a second reboiler is arranged below the secondary rectification column, and an inlet and an outlet of the second reboiler are both communicated with the bottom of the secondary rectification column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221697796.7U CN217627989U (en) | 2022-07-01 | 2022-07-01 | Isopropyl alcohol effluent disposal system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221697796.7U CN217627989U (en) | 2022-07-01 | 2022-07-01 | Isopropyl alcohol effluent disposal system |
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| CN217627989U true CN217627989U (en) | 2022-10-21 |
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| CN202221697796.7U Active CN217627989U (en) | 2022-07-01 | 2022-07-01 | Isopropyl alcohol effluent disposal system |
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