CN211896487U - Mother liquor recovery unit in PTA waste water - Google Patents
Mother liquor recovery unit in PTA waste water Download PDFInfo
- Publication number
- CN211896487U CN211896487U CN202020237838.3U CN202020237838U CN211896487U CN 211896487 U CN211896487 U CN 211896487U CN 202020237838 U CN202020237838 U CN 202020237838U CN 211896487 U CN211896487 U CN 211896487U
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- CN
- China
- Prior art keywords
- mother liquor
- stirring
- pta
- communicated
- filter
- 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.)
- Expired - Fee Related
Links
- 239000012452 mother liquor Substances 0.000 title claims abstract description 56
- 239000002351 wastewater Substances 0.000 title claims abstract description 21
- 238000011084 recovery Methods 0.000 title claims description 22
- 238000003756 stirring Methods 0.000 claims abstract description 43
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 9
- 238000001802 infusion Methods 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 20
- 239000010865 sewage Substances 0.000 claims description 11
- 238000000108 ultra-filtration Methods 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims 2
- 238000001914 filtration Methods 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- 241001233242 Lontra Species 0.000 abstract description 2
- 230000007774 longterm Effects 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 26
- 238000007670 refining Methods 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 4
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Abstract
The utility model relates to the technical field of wastewater treatment, in particular to a device for recovering mother liquor in PTA wastewater, which comprises a primary centrifuge; one side of the primary centrifugal machine is communicated with the spiral plate heat exchanger through a material conveying pipeline; the spiral plate heat exchanger is communicated with a mother liquor filter through a cooling pipeline, and an infusion pump is arranged between the mother liquor filter and the spiral plate heat exchanger. The utility model discloses agitator motor has been set up on the top of mother liquor filter, heavy metal impurity through agitator motor drive stirring pivot and puddler in to the PTA mother liquor carries out preliminary stirring, and carry out preliminary filtering work to it via filtering the otter board, directly arrange into the secondary filter chamber through the flowing back fill after the prefiltering, carry out the meticulous filtering work of secondary through milipore filter filtration PTA mother liquor, avoid milipore filter filtration to take place to block up at the in-process of long-term use, be difficult to the clearance, the purpose that has reached emission reduction and consumption reduction, resources and energy have been practiced thrift, waste water waste residue discharges has been reduced, the waste water comprehensive utilization rate has been improved.
Description
Technical Field
The utility model relates to a waste water treatment technical field specifically is a mother liquor recovery unit in PTA waste water.
Background
Generally, a terephthalic acid production facility comprises two sections — an oxidation facility and a purification facility. In the oxidation apparatus, the raw material p-xylene (PX) is mixed with acetic acid solvent (AA) and catalyst solution, then fed into a reactor, and reacted with oxygen in air fed into the reactor to produce Crude Terephthalic Acid (CTA). The refining apparatus is used for further refining the CTA crystals produced in the oxidation apparatus to reduce the content of impurities, and then using the refined CTA crystals as a raw material (for example, for producing polyester).
Typically, a refining plant comprises seven units-feed configuration and preheating, dissolution and reaction, crystallization, pressure filtration and repulping, centrifugation and drying, exhaust gas scrubbing and process water make-up, mother liquor recovery. In the mother liquor recovery unit in the prior art, the mother liquor obtained in the preorder step is collected in a PTA mother liquor tank, and the mother liquor is flashed into a PTA mother liquor flash evaporation container. The mother liquor in the flash vessel is pumped via a PTA mother liquor filter feed pump to a PTA mother liquor filter. In order to improve the recovery efficiency of the slurry, a PTA mother liquor cooler is arranged between the feeding pump of the PTA mother liquor filter and the PTA mother liquor filter. The filtrate in the PTA mother liquor filter can be sent to a wastewater treatment section for biological treatment. However, in the filtering process of the PTA refining mother liquor, the PTA refining mother liquor is generally filtered by an ultrafiltration membrane, but the heavy metal content in the wastewater is too high, so that the ultrafiltration membrane is easily blocked, the filtering effect is seriously influenced, the energy consumption is increased, and the national requirements for energy conservation and emission reduction are not met.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a mother liquor recovery unit in PTA waste water to solve the problem of proposition in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a recovery device of mother liquor in PTA wastewater comprises a primary centrifuge; one side of the primary centrifugal machine is communicated with the spiral plate heat exchanger through a material conveying pipeline; the spiral plate heat exchanger is communicated with a mother liquor filter through a cooling pipeline, and an infusion pump is arranged between the mother liquor filter and the spiral plate heat exchanger; the stirring structure comprises a stirring mounting ring, and a plurality of stirring rods are arranged on the outer ring of the stirring mounting ring in an array manner; the bottom of the mother liquor filter is provided with a heavy metal filter screen plate, the bottom of the heavy metal filter screen plate is provided with a liquid discharge hopper, the bottom of the liquid discharge hopper is communicated with a secondary filter chamber, and an ultrafiltration membrane filter structure is arranged inside the secondary filter chamber; and a liquid discharge port is arranged at the bottom of the secondary filter chamber and communicated with a liquid discharge pipeline.
Preferably, the left side and the right side of the liquid discharge pipeline are respectively communicated with a recovery pipeline and a sewage discharge pipeline, the recovery pipeline is used for being communicated with the PTA batching device, and the sewage discharge pipeline is used for being communicated with the sewage treatment device.
Preferably, the stirring mounting ring is provided with a plurality of mounting holes for connecting the stirring rotating shaft.
Preferably, a flow control valve is mounted on the drain hopper.
Preferably, a pressurizing pump is arranged between the spiral plate heat exchanger and the primary centrifugal machine.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses agitator motor has been set up on the top of mother liquor filter, heavy metal impurity through agitator motor drive stirring pivot and puddler in to the PTA mother liquor carries out preliminary stirring, and carry out preliminary filtering work to it via filtering the otter board, directly arrange into the secondary filter chamber through the flowing back fill after the prefiltering, carry out the meticulous filtering work of secondary through milipore filter filtration PTA mother liquor, avoided milipore filter filtration to take place to block up and be difficult to the condition of clearance at the in-process of long-term use, the purpose of reducing emission and consumption reduction has been reached, resources and energy have been practiced thrift, waste water waste residue discharges has been reduced again, waste water comprehensive utilization is improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic diagram of the stirring structure of the present invention.
In the figure: 1. a primary centrifuge; 2. a spiral plate heat exchanger; 3. a mother liquor filter; 4. a pressure pump; 5. an infusion pump; 6. a stirring motor; 7. a stirring rotating shaft; 8. a mounting ring; 9. a stirring rod; 10. a filter screen plate; 11. a liquid discharge hopper; 12. a secondary filtering chamber; 13. an ultrafiltration membrane filtration structure; 14. a liquid discharge conduit; 15. a recovery pipeline; 16. a blowdown line; 17. a flow control valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Referring to fig. 1-2, the present invention provides a technical solution: a recovery device of mother liquor in PTA wastewater comprises a primary centrifuge 1; one side of the primary centrifugal machine 1 is communicated with the spiral plate heat exchanger 2 through a material conveying pipeline; the spiral plate heat exchanger 2 is communicated with a mother liquor filter 3 through a cooling pipeline, and an infusion pump 5 is arranged between the mother liquor filter 3 and the spiral plate heat exchanger 2; the top end of the mother liquor filter 3 is provided with a stirring motor 6, the stirring motor 6 is connected with a stirring rotating shaft 7, the outer wall of the stirring rotating shaft 7 is provided with a stirring structure, the stirring structure comprises a stirring mounting ring 8, and a plurality of stirring rods 9 are arranged on the outer ring of the stirring mounting ring 8 in an array manner; the bottom of the mother liquor filter 3 is provided with a heavy metal filter screen plate 10, the bottom of the heavy metal filter screen plate 10 is provided with a liquid discharge hopper 11, the bottom of the liquid discharge hopper 11 is communicated with a secondary filter chamber 12, and an ultrafiltration membrane filter structure 13 is arranged inside the secondary filter chamber 12; the bottom of the secondary filter chamber 12 is provided with a liquid outlet which is communicated with a liquid discharge pipeline 14.
Further, the left side and the right side of the liquid discharge pipeline 14 are respectively communicated with a recovery pipeline 15 and a sewage discharge pipeline 16, the recovery pipeline 15 is used for being communicated with the PTA batching device, and the sewage discharge pipeline 16 is used for being communicated with the sewage treatment device.
Furthermore, a plurality of mounting holes for connecting the stirring rotating shaft 7 are arranged on the stirring mounting ring 8.
Further, a flow control valve 17 is mounted on the drain hopper 11.
Further, a booster pump 4 is arranged between the spiral plate heat exchanger 2 and the primary centrifuge 1.
The working principle is as follows: before the utility model is used, an operator firstly checks whether the internal structure is intact, and after the checking is correct, the operator switches on the power supply, starts the primary centrifuge 1, carries out centrifugal work on the wastewater of the PTA device refining unit, starts the pressure pump 4, pumps the separated PTA mother liquor to the spiral plate heat exchanger 2 through the material conveying pipeline, cools the temperature of the PTA mother liquor to about 40 ℃, then starts the infusion pump 5, and conveys the mother liquor after being cooled to the mother liquor filter 3 through the cooling pipeline; then, an operator starts the stirring motor 6, and drives the stirring rotating shaft 7 and a stirring structure on the stirring rotating shaft 7 through the stirring motor 6 to fully stir the mother liquor; in the stirring process, impurities contained in the mother liquor are intercepted by the filter screen plate 10 when the mother liquor passes through the filter screen plate, the filtered mother liquor is discharged into a secondary filter chamber 12 through a liquid discharge hopper 11, and the mother liquor is fully filtered through an ultrafiltration membrane filtering structure 13; after the filtration is finished, the wastewater respectively flows into the recovery pipeline 15 and the sewage discharge pipeline 16 through the liquid discharge pipeline 14 to be recycled and sewage treated, so that the purposes of emission reduction and consumption reduction are achieved, resources and energy are saved, the emission of wastewater and waste residues is reduced, and the comprehensive utilization rate of the wastewater is improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a mother liquor recovery unit in PTA waste water which characterized in that: comprises a primary centrifuge (1); one side of the primary centrifugal machine (1) is communicated with the spiral plate heat exchanger (2) through a material conveying pipeline; the spiral plate heat exchanger (2) is communicated with a mother liquor filter (3) through a cooling pipeline, and an infusion pump (5) is arranged between the mother liquor filter (3) and the spiral plate heat exchanger (2); a stirring motor (6) is installed at the top end of the mother liquor filter (3), the stirring motor (6) is connected with a stirring rotating shaft (7), a stirring structure is installed on the outer wall of the stirring rotating shaft (7), the stirring structure comprises a stirring installation ring (8), and a plurality of stirring rods (9) are arranged on the outer ring of the stirring installation ring (8) in an array manner; the bottom of the mother liquor filter (3) is provided with a heavy metal filter screen plate (10), the bottom of the heavy metal filter screen plate (10) is provided with a liquid discharge hopper (11), the bottom of the liquid discharge hopper (11) is communicated with a secondary filter chamber (12), and an ultrafiltration membrane filter structure (13) is arranged inside the secondary filter chamber (12); and a liquid discharge port is arranged at the bottom of the secondary filter chamber (12), and is communicated with a liquid discharge pipeline (14).
2. The apparatus as claimed in claim 1, wherein the recovery apparatus of mother liquor in PTA wastewater comprises: the left side and the right side of the liquid drainage pipeline (14) are respectively communicated with a recovery pipeline (15) and a sewage discharge pipeline (16), the recovery pipeline (15) is used for being communicated with the PTA batching device, and the sewage discharge pipeline (16) is used for being communicated with the sewage treatment device.
3. The apparatus as claimed in claim 1, wherein the recovery apparatus of mother liquor in PTA wastewater comprises: and a plurality of mounting holes used for connecting the stirring rotating shaft (7) are formed in the stirring mounting ring (8).
4. The apparatus as claimed in claim 1, wherein the recovery apparatus of mother liquor in PTA wastewater comprises: and a flow control valve (17) is arranged on the liquid discharge hopper (11).
5. The apparatus as claimed in claim 1, wherein the recovery apparatus of mother liquor in PTA wastewater comprises: and a booster pump (4) is arranged between the spiral plate heat exchanger (2) and the primary centrifugal machine (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020237838.3U CN211896487U (en) | 2020-03-02 | 2020-03-02 | Mother liquor recovery unit in PTA waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020237838.3U CN211896487U (en) | 2020-03-02 | 2020-03-02 | Mother liquor recovery unit in PTA waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211896487U true CN211896487U (en) | 2020-11-10 |
Family
ID=73301751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020237838.3U Expired - Fee Related CN211896487U (en) | 2020-03-02 | 2020-03-02 | Mother liquor recovery unit in PTA waste water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211896487U (en) |
-
2020
- 2020-03-02 CN CN202020237838.3U patent/CN211896487U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201110 |