CN219792756U - Device for extracting sodium acetate from PTA continuous wastewater - Google Patents
Device for extracting sodium acetate from PTA continuous wastewater Download PDFInfo
- Publication number
- CN219792756U CN219792756U CN202321353575.2U CN202321353575U CN219792756U CN 219792756 U CN219792756 U CN 219792756U CN 202321353575 U CN202321353575 U CN 202321353575U CN 219792756 U CN219792756 U CN 219792756U
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- China
- Prior art keywords
- effect
- effect evaporator
- pta
- evaporator
- stripping tower
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- 239000002351 wastewater Substances 0.000 title claims abstract description 19
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 title claims abstract description 18
- 239000001632 sodium acetate Substances 0.000 title claims abstract description 18
- 235000017281 sodium acetate Nutrition 0.000 title claims abstract description 18
- 238000001704 evaporation Methods 0.000 claims abstract description 16
- 230000008020 evaporation Effects 0.000 claims abstract description 15
- 239000013078 crystal Substances 0.000 claims abstract description 7
- 239000002002 slurry Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 230000005494 condensation Effects 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 14
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract description 12
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000006227 byproduct Substances 0.000 abstract description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 20
- 239000007789 gas Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000005086 pumping Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000010413 mother solution Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Abstract
The utility model relates to a device for extracting sodium acetate from PTA continuous wastewater, which comprises a stripping tower (01); the stripping tower (01) is sequentially connected with the pH mixer (04) and the triple-effect evaporation unit; the three-effect evaporation unit comprises a three-effect evaporator (05), a two-effect evaporator (06), a one-effect evaporator (07) and a single-effect evaporator (08) which are connected in sequence; the single-effect evaporator (08) is connected with the crystal slurry tank (09) and the centrifugal machine (10) in sequence. The utility model can treat PTA continuous wastewater, fully utilizes byproduct organic steam of the device as a heat source, recovers sodium acetate, methanol, isobutanol and other organic matters in the PTA wastewater, can greatly reduce the energy consumption and material consumption of the whole process, and has good industrial application background.
Description
Technical Field
The utility model belongs to the field of chemical wastewater treatment, and particularly relates to a device for extracting sodium acetate from PTA continuous wastewater.
Background
Terephthalic Acid (PTA) is an important raw material for producing Polyester (PET) fibers and resins, and the main flow PTA sewage treatment scheme at present is a biochemical treatment method: a secondary aerobic process and an anaerobic-aerobic combined process.
And (3) a secondary aerobic process:
the secondary aerobic treatment process has high COD treating capacity and advanced treating capacity.
Anaerobic-aerobic combined process:
the anaerobic treatment process is a very economical water treatment technology, has obvious advantages in particular to the treatment of high-concentration organic wastewater, and is widely applied to PTA and PET wastewater treatment in recent years.
Anaerobic biological treatment is to degrade organic matters in sewage by anaerobic microorganisms under anaerobic conditions, and is often used for treating organic sludge and high-concentration organic wastewater, and a large amount of gas is produced by anaerobic treatment, mainly methane gas and carbon dioxide, and a small amount of hydrogen sulfide, hydrogen and the like. However, the anaerobic and aerobic traditional sewage treatment process has large occupied area, high energy consumption and material consumption, needs additional treatment for generating a large amount of sludge, and needs discharge for treating water reaching the standard.
Therefore, there is a need to develop a new treatment device for PTA wastewater.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a device for extracting sodium acetate from PTA continuous wastewater, which can greatly reduce the energy consumption and material consumption of the whole process, and the occupied area of the device is fundamentally changed compared with the traditional process flow.
The utility model provides a device for extracting sodium acetate from PTA continuous wastewater, which comprises a stripping tower; the stripping tower is connected with the pH mixer and the triple-effect evaporation unit in sequence; the three-effect evaporation unit comprises a three-effect evaporator, a two-effect evaporator, a one-effect evaporator and a single-effect evaporator which are sequentially connected; the single-effect evaporator is connected with the crystal slurry tank and the centrifugal machine in sequence.
Further, the stripping tower is sequentially connected with a stripping tower cooler and a stripping vacuumizing system.
Further, the three-effect evaporator is sequentially connected with the three-effect cooler and the three-effect vacuumizing system.
Further, a three-effect condensation water tank is arranged and is connected with the three-effect cooler, the three-effect evaporator and the two-effect evaporator.
Further, the single-effect evaporator is connected with the single-effect cooler and the single-effect vacuumizing system in a secondary mode.
Further, the organic stripping produced by the PTA unit provides a heat source for a single effect evaporator, stripper and triple effect evaporation unit.
The utility model also provides a method for extracting sodium acetate from PTA continuous wastewater, which comprises the following steps:
feeding PTA continuous wastewater into a stripping tower, feeding a gas phase product at the top of the stripping tower into a stripping tower cooler for condensation, and recycling the obtained condensate;
and (3) feeding a liquid-phase product in the bottom of the stripping tower into a pH mixer, adding alkali to adjust pH to be alkaline, then conveying the liquid-phase product to a three-effect evaporator, a two-effect evaporator, a one-effect evaporator and a single-effect evaporator for sequential evaporation and concentration, pumping the concentrated solution to a crystal slurry tank to cool and crystallize through a pump when the concentrated solution reaches a set concentration, separating sodium acetate through a centrifugal machine, and returning the mother solution to the system.
The organic steam generated by the PTA device is used for a single-effect evaporator, a stripping tower and a single-effect evaporator; the second-effect evaporator uses the second flash steam generated by the first-effect evaporator; the triple-effect evaporator uses secondary steam generated by the double-effect evaporator, and the secondary steam generated by the triple-effect evaporator enters the triple-effect cooler for condensation.
Advantageous effects
(1) The utility model separates, extracts and recovers methanol, isobutanol, methyl acetate and a small amount of other light component organic matters by a stripping tower, thereby saving material consumption.
(2) The utility model adopts three-stage evaporation to separate sodium acetate from clean water in wastewater, the sodium acetate solution is concentrated and then subjected to single-effect treatment, and the water produced by evaporation is subjected to reclaimed water recycling treatment.
(3) The utility model concentrates sodium acetate, and the sodium acetate solid is obtained by cooling and crystallizing in a crystal slurry tank and separating water by a centrifuge.
(4) The utility model fully utilizes the byproduct organic steam of the device as a heat source, recovers sodium acetate, methanol, isobutanol and other organic matters in PTA wastewater, can greatly reduce the energy consumption and material consumption of the whole process, and has good industrial application background.
Drawings
FIG. 1 is a schematic view of the apparatus of the present utility model;
wherein, 01, stripping tower; 02. a stripper cooler; 03. a stripping vacuumizing system; 04. a pH mixer; 05. a triple effect evaporator; 06. a two-effect evaporator; 07. a first effect evaporator; 08. a single-effect evaporator; 09. a magma tank; 10. a centrifuge system; 11. a single-effect cooler; 12. a single-effect vacuumizing system; 13. a three-effect cooler; 14. a three-effect vacuumizing system; 15. three-effect condensed water tank.
Detailed Description
The utility model will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the teachings of the present utility model, and such equivalents are intended to fall within the scope of the utility model as defined in the appended claims.
Example 1
The embodiment provides a device for extracting sodium acetate from PTA continuous wastewater, which comprises a stripping tower 01; the stripping tower 01 is connected with the pH mixer 04 and the triple-effect evaporation unit in sequence; the three-effect evaporation unit comprises a three-effect evaporator 05, a two-effect evaporator 06, a one-effect evaporator 07 and a single-effect evaporator 08 which are sequentially connected; the single-effect evaporator 08 is connected with the crystal slurry tank 09 and the centrifugal machine 10 in sequence. The stripping tower 01 is connected with a stripping tower cooler 02 and a stripping vacuumizing system 03 in sequence. The triple-effect evaporator 05 is sequentially connected with a triple-effect cooler 13 and a triple-effect vacuumizing system 14. A three-effect condensate water tank 15 is arranged and is connected with the three-effect cooler 13, the three-effect evaporator 05 and the two-effect evaporator 06. The single-effect evaporator 08 is connected with the single-effect cooler 11 and the single-effect vacuumizing system 12 in sequence. The organic stripping generated by the PTA device is used for supplying heat sources of a single-effect evaporator, a stripping tower and a three-effect evaporation unit.
The embodiment also provides a method for extracting sodium acetate from PTA continuous wastewater, which comprises the following steps:
the PTA continuous wastewater is fed into a stripping tower 01, and methanol, isobutanol and a small amount of other light component organic matters are mainly separated from water by utilizing the difference of boiling points of various materials under the condition of negative pressure pumping of a vacuum pump system. Providing qualified water for the sewage evaporation concentration device, enabling a gas phase product at the top of the stripping tower 01 to enter a stripping tower cooler 02 for condensation, enabling the obtained condensate to enter a low-boiling-point substance storage tank for recycling through gravity, and pumping non-condensable gas by a vacuum pump and finally discharging the non-condensable gas to the outside of the tank for treatment;
and (3) feeding a liquid-phase product in a tower kettle of the stripping tower 01 into a pH mixer 04, adding alkali to adjust pH to alkaline, conveying to a three-effect evaporator 05, a two-effect evaporator 06, a one-effect evaporator 07 and a single-effect evaporator 08, sequentially evaporating and concentrating, pumping the concentrated solution into a crystal slurry tank 09 to cool and crystallize when the concentrated solution reaches a set concentration, separating sodium acetate by a centrifugal machine 10, and returning the mother solution to the system.
The device organic steam generated by the PTA device is used for a single-effect evaporator 08, a stripping tower 01 and a single-effect evaporator 07; the secondary flash steam generated by the primary evaporator 07 is used by the secondary evaporator 06; the secondary steam generated by the three-effect evaporator 05 is used by the three-effect evaporator 06, and the secondary steam generated by the three-effect evaporator 05 enters the three-effect cooler 13 for condensation.
Condensed water generated by the triple-effect evaporator 05 and the double-effect evaporator 06 is flashed step by step, and finally is recovered to the triple-effect condensed water tank 15, and the evaporated water is conveyed to reclaimed water recycling treatment.
Claims (6)
1. The device for extracting sodium acetate from PTA continuous wastewater is characterized in that: comprising a stripping tower (01); the stripping tower (01) is sequentially connected with the pH mixer (04) and the triple-effect evaporation unit; the three-effect evaporation unit comprises a three-effect evaporator (05), a two-effect evaporator (06), a one-effect evaporator (07) and a single-effect evaporator (08) which are connected in sequence; the single-effect evaporator (08) is connected with the crystal slurry tank (09) and the centrifugal machine (10) in sequence.
2. The apparatus according to claim 1, wherein: the stripping tower (01) is sequentially connected with the stripping tower cooler (02) and the stripping vacuumizing system (03).
3. The apparatus according to claim 1, wherein: the three-effect evaporator (05) is sequentially connected with the three-effect cooler (13) and the three-effect vacuumizing system (14).
4. The apparatus according to claim 1, wherein: a three-effect condensation water tank (15) is arranged and is connected with the three-effect cooler (13), the three-effect evaporator (05) and the two-effect evaporator (06).
5. The apparatus according to claim 1, wherein: the single-effect evaporator (08) is sequentially connected with the single-effect cooler (11) and the single-effect vacuumizing system (12).
6. The apparatus according to claim 1, wherein: the organic stripping produced by the PTA device is used for heat sources of a single-effect evaporator (08), a stripping tower (01) and a three-effect evaporation unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321353575.2U CN219792756U (en) | 2023-05-31 | 2023-05-31 | Device for extracting sodium acetate from PTA continuous wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321353575.2U CN219792756U (en) | 2023-05-31 | 2023-05-31 | Device for extracting sodium acetate from PTA continuous wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219792756U true CN219792756U (en) | 2023-10-03 |
Family
ID=88184289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321353575.2U Active CN219792756U (en) | 2023-05-31 | 2023-05-31 | Device for extracting sodium acetate from PTA continuous wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219792756U (en) |
-
2023
- 2023-05-31 CN CN202321353575.2U patent/CN219792756U/en active Active
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