CN211871510U - Toluene diisocyanate waste water pH adjusting device - Google Patents
Toluene diisocyanate waste water pH adjusting device Download PDFInfo
- Publication number
- CN211871510U CN211871510U CN202020170813.6U CN202020170813U CN211871510U CN 211871510 U CN211871510 U CN 211871510U CN 202020170813 U CN202020170813 U CN 202020170813U CN 211871510 U CN211871510 U CN 211871510U
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- China
- Prior art keywords
- pipeline
- adjusting
- mixer
- mixed liquid
- groove
- 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
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- 239000002351 wastewater Substances 0.000 title claims abstract description 14
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 238000005192 partition Methods 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 239000003513 alkali Substances 0.000 description 10
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 description 10
- 238000005868 electrolysis reaction Methods 0.000 description 7
- 239000002699 waste material Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 238000006396 nitration reaction Methods 0.000 description 5
- 239000006227 byproduct Substances 0.000 description 4
- 239000011259 mixed solution Substances 0.000 description 4
- 229910002651 NO3 Inorganic materials 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 238000010979 pH adjustment Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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Abstract
The utility model provides a pH adjusting device for toluene diisocyanate production wastewater, which comprises a diversion tank and an adjusting tank which are mutually communicated by adopting pipelines; a three-way mixer is arranged at the pipeline close to the diversion groove, and low-pressure steam is introduced through the three-way mixer so as to preheat the mixed liquid flowing out of the diversion groove; a pipeline mixer is arranged at the pipeline close to the regulating tank so as to improve the mixing effect of the mixed liquid; a pipeline pH detection device and a temperature sensing device are arranged between the three-way mixer and the pipeline mixer; the baffle groove comprises a baffle groove body and partition plates alternately arranged in the baffle groove body at intervals; one end of the diversion groove is provided with a mixed liquid inlet, and the other end of the diversion groove is communicated with the pipeline.
Description
Technical Field
The utility model relates to a toluene diisocyanate waste water pH adjusting device belongs to adjusting device's technical field.
Background
The toluene diisocyanate relates to nitration reaction, hydrogenation reaction, photochemical reaction and the like in the production process, nitration red water, yellow nitrate water, photochemical waste alkali liquor, hydrogenated wastewater and the like are respectively generated in the nitration process, the hydrogenation process and the photochemical process, the nitration red water shows weak acidity, the yellow nitrate water shows strong acidity, the photochemical waste alkali liquor shows strong alkalinity, and because the nitration red water, the yellow nitrate water and the photochemical waste alkali liquor contain nitrobenzene substances or chlorobenzene substances which are difficult to degrade, micro-electrolysis pretreatment is needed to improve the physicochemical treatment efficiency.
The micro-electrolysis reaction needs to provide proper pH conditions, the traditional pH adjusting mode is to add the nitrified red water, the nitrified yellow water and the photochemical waste alkali liquor into the structure respectively for stirring and mixing, and referring to figure 1, the pH adjusting device has the problems of large pH fluctuation and large pH adjusting difficulty; in addition, nitrobenzene substances are easy to precipitate at low temperature to wrap a pH meter probe, so that the problems of inaccurate on-line pH value and the like can be caused.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem that the current pH fluctuates greatly and the pH frequently appears and shows inaccurate, the utility model provides a toluene diisocyanate industrial wastewater pH adjusting device. The device convenient operation can solve present pH fluctuation big and pH frequently appear showing inaccurate problem, has guaranteed that little electrolysis reaction condition pH is in suitable within range, has improved waste water pretreatment efficiency.
The technical scheme of the utility model as follows:
a toluene diisocyanate production wastewater pH adjusting device comprises a diversion tank and an adjusting tank which are communicated with each other by pipelines; a three-way mixer is arranged at the pipeline close to the diversion groove, and low-pressure steam is introduced through the three-way mixer so as to preheat the mixed liquid flowing out of the diversion groove; a pipeline mixer is arranged at the pipeline close to the regulating tank so as to improve the mixing effect of the mixed liquid; a pipeline pH detection device and a temperature sensing device are arranged between the three-way mixer and the pipeline mixer; the baffle groove comprises a baffle groove body and partition plates alternately arranged in the baffle groove body at intervals; one end of the diversion groove is provided with a mixed liquid inlet, and the other end of the diversion groove is communicated with the pipeline.
Further, the equalizing basin includes the cell body and is used for mixing the agitator of mixed liquid, the agitator is rotated by motor drive.
Further, the rotating speed of the motor is 200-.
Further, the stirrer is a double-layer stirring paddle.
Further, the partition plates are arranged every 0.5 m.
The utility model discloses following beneficial effect has:
1. the technical scheme adopted by the utility model for solving the technical problems is to technically transform the prior pH adjusting device, and automatically flow and mix the nitrified red water, the nitrated yellow water and the photochemical waste alkali liquor through the baffling groove, thereby improving the mixing effect of the three and completing the pH pre-adjustment; introducing a certain amount of low-pressure steam which is a byproduct of a company into a three-way position of the pipeline to preheat the mixed solution, and controlling the temperature of the mixed solution through temperature measurement of a thermocouple to prevent nitrobenzene substances from crystallizing and separating out to wrap a pH meter probe, thereby solving the problem that the pH meter probe is easily wrapped by crystals; in addition, the mixing effect is improved and the pH is adjusted by mechanical stirring through a pipeline mixer, so that the pH of the mixed solution is adjusted to be 2-4 stably, proper conditions are provided for the efficient and stable operation of the micro-electrolysis reaction, and the pretreatment efficiency of the micro-electrolysis is also ensured;
2. the utility model has simple operation, solves the problems of large pH fluctuation and inaccurate pH frequent display, and can solve the problem of large difficulty in pH adjustment by pre-adjusting the baffle groove; the problem of inaccurate display caused by crystallization, precipitation and coating of a pH meter of nitrobenzene substances in the wastewater can be solved by using the low-pressure steam of a company byproduct, and continuous and stable operation of the micro-electrolysis reaction is ensured.
3. Compared with the prior pH adjusting device, the utility model has the advantages of simple operation, easy pH adjustment and high stability; pre-adjusting the nitrified red water, the nitrified yellow water and the photochemical waste alkali liquor through a simple self-flow baffling tank; the problem of inaccurate display caused by crystallization separation of nitrobenzene substances in the wastewater and coating of a pH meter can be solved by using the low-pressure steam byproduct of the company; the mixing effect of the mixed liquid and acid or alkali is improved through the pipeline mixer, the readjustment function is completed, and finally the mixed liquid is mixed through mechanical stirring, so that the pH value of the mixed liquid pumped out is ensured to be within a proper range, and the functions of pH value adjustment means and multi-stage fine adjustment are added.
Drawings
FIG. 1 is a schematic view of a conventional pH adjusting apparatus;
fig. 2 is a schematic view of the adjusting device of the present invention.
The reference numbers in the figures denote:
1. a regulating tank; 2. a stirrer; 3. a motor; 4. a pH detection device of the adjusting tank; 5. discharging the water pump; 6. a pipeline mixer; 7. a pipeline pH detection device; 8. a temperature sensing device; 9. a three-way mixer; 10. a diversion groove; 101. a baffle tank body; 102. a partition plate; 103. a mixed liquid inlet; 11. a pipeline; 12. a tank body.
Detailed Description
As shown in fig. 2, comprises a diversion groove 10 and a regulating reservoir 1 which are communicated with each other by a pipeline 11; a three-way mixer 9 is arranged at the pipeline 11 close to the baffling groove 10, and low-pressure steam is introduced through the three-way mixer 9 so as to preheat the mixed liquid flowing out of the baffling groove 10; a pipeline mixer 6 is arranged at the position of a pipeline 11 close to the regulating tank 1 so as to improve the mixing effect of the mixed liquid; a pipeline pH detection device 7 and a temperature sensing device 8 are arranged between the three-way mixer 9 and the pipeline mixer 6; the baffle groove 10 comprises a baffle groove body 101 and partition plates 102 alternately arranged in the baffle groove body 101 at intervals; one end of the diversion groove 10 is provided with a mixed liquid inlet 103, and the other end is communicated with the pipeline 11.
Further, the adjusting tank 1 comprises a tank body 12 and a stirrer 2 for mixing the mixed liquid, and the stirrer 2 is driven by a motor 3 to rotate.
Further, the stirrer 2 is a double-layer stirring paddle.
Further, the rotating speed of the motor 3 is 200-.
Further, the spacers 102 are provided one at every 0.5 m.
The utility model discloses a theory of operation:
respectively sending the nitrated red water, the nitrated yellow water and the photochemical waste alkali liquor into a diversion groove 10 to flow through a partition plate 102 to complete premixing, introducing low-pressure steam of a company byproduct at a three-way mixer 9 to improve the temperature of the mixed liquor, sensing the temperature of the mixed liquor by a temperature sensing device 8, then sending a signal to a control platform PLC (programmable logic controller), and then sending a signal to the control platform PLC to control an automatic regulating valve to automatically regulate, so that the steam flux is regulated, thereby regulating the temperature of the mixed liquor; flexibly adding acid or adding alkali according to the online numerical value of a pipeline pH detection device 7 for pre-adjusting in advance, then automatically flowing into an adjusting tank 1, driving a stirrer 2 to mechanically stir under the action of a motor 3, displaying the pH value through an online adjusting tank pH detection device 4, adding acid or adding alkali according to the online adjusting tank pH detection device 4 for further adjusting the pH value, and then sending the mixed solution to a micro-electrolysis reactor for reaction through a water outlet pump 5; and signals of the temperature, the pH value and the automatic regulating valve are all accessed to a PLC or DCS system of the control platform for remote monitoring.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (5)
1. The utility model provides a toluene diisocyanate waste water pH adjusting device which characterized in that: comprises a diversion groove (10) and an adjusting tank (1) which are mutually communicated by adopting a pipeline (11); a three-way mixer (9) is arranged at the position of the pipeline (11) close to the diversion groove (10), and low-pressure steam is introduced through the three-way mixer (9) so as to preheat the mixed liquid flowing out of the diversion groove (10); a pipeline mixer (6) is arranged at the position of a pipeline (11) close to the regulating tank (1) so as to improve the mixing effect of the mixed liquid; a pipeline pH detection device (7) and a temperature sensing device (8) are arranged between the three-way mixer (9) and the pipeline mixer (6); the baffling groove (10) comprises a baffling groove body (101) and partition plates (102) which are alternately arranged in the baffling groove body (101) at intervals; one end of the diversion groove (10) is provided with a mixed liquid inlet (103), and the other end is communicated with the pipeline (11).
2. The apparatus for adjusting pH of wastewater from tolylene diisocyanate production according to claim 1, characterized in that: the adjusting tank (1) comprises a tank body (12) and a stirrer (2) for mixing mixed liquid, wherein the stirrer (2) is driven to rotate by a motor (3).
3. The apparatus for adjusting pH of wastewater from tolylene diisocyanate production according to claim 2, characterized in that: the stirrer (2) is a double-layer stirring paddle.
4. The apparatus for adjusting pH of wastewater from tolylene diisocyanate production according to claim 3, characterized in that: the rotating speed of the motor (3) is 200-450 r/min.
5. The pH adjusting device for toluene diisocyanate production wastewater as set forth in claim 4, wherein: the partition plates (102) are arranged at intervals of 0.5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020170813.6U CN211871510U (en) | 2020-02-14 | 2020-02-14 | Toluene diisocyanate waste water pH adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020170813.6U CN211871510U (en) | 2020-02-14 | 2020-02-14 | Toluene diisocyanate waste water pH adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211871510U true CN211871510U (en) | 2020-11-06 |
Family
ID=73252948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020170813.6U Expired - Fee Related CN211871510U (en) | 2020-02-14 | 2020-02-14 | Toluene diisocyanate waste water pH adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211871510U (en) |
-
2020
- 2020-02-14 CN CN202020170813.6U patent/CN211871510U/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: 20201106 |