CN217418295U - Device for automatically adjusting pH of ibuprofen crude product mother liquor - Google Patents
Device for automatically adjusting pH of ibuprofen crude product mother liquor Download PDFInfo
- Publication number
- CN217418295U CN217418295U CN202122713691.8U CN202122713691U CN217418295U CN 217418295 U CN217418295 U CN 217418295U CN 202122713691 U CN202122713691 U CN 202122713691U CN 217418295 U CN217418295 U CN 217418295U
- Authority
- CN
- China
- Prior art keywords
- stage
- diaphragm pump
- liquid alkali
- mother liquor
- frequency
- 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.)
- Active
Links
Images
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Medicines Containing Plant Substances (AREA)
Abstract
The utility model provides a device for automatically adjusting the pH value of a crude ibuprofen mother liquor, which automatically adjusts the pH value of the crude ibuprofen mother liquor in a chain manner to reach the qualified standard of environmental treatment water; the utility model basically realizes continuous and automatic treatment, greatly reduces the labor cost and improves the labor production efficiency; meanwhile, the error generated by manual operation is eliminated, the pH value of the ibuprofen crude product mother liquor is accurately controlled, the mother liquor treatment qualification rate is improved, the waste of liquid caustic soda raw materials is further avoided, and the production cost of the ibuprofen raw materials is greatly reduced.
Description
Technical Field
The utility model relates to the field of pharmaceutical chemicals, in particular to a method for treating production wastewater in an ibuprofen synthesis process.
Technical Field
Ibuprofen, chemical name: 2- (4-isobutylphenyl) propionic acid, wherein the ibuprofen crude product is an important raw material for refining ibuprofen in the ibuprofen synthesis process, is white or white-like powder, is obtained by acidifying an ibuprofen sodium aqueous solution to obtain an ibuprofen crude suspension, and centrifuging and washing to obtain the ibuprofen crude product; wherein the pH value of the ibuprofen crude product mother liquor obtained by centrifugation is 2-3. The pH adjustment of the part of mother liquor water is a very important process link in the treatment process of the production wastewater in the ibuprofen production process, and the pH of the part of mother liquor water must be ensured to reach the qualified standard of environment-friendly treated water. In the existing ibuprofen mother liquor treatment technology, caustic soda liquid needs to be manually added into the crude ibuprofen mother liquor, the pH value of treated water is measured, the method for adjusting the pH value of the ibuprofen crude mother liquor by manually adding the caustic soda liquid is difficult to control the pH value of the water to be stable, and the defects that the treated water of the ibuprofen crude mother liquor does not meet the qualified standard of environment-friendly treated water or the caustic soda liquid is excessively added to cause liquid caustic soda waste and the like exist.
SUMMERY OF THE UTILITY MODEL
The utility model provides an automatic adjust device of ibuprofen crude mother liquor pH: the device comprises a centrifuge, an ibuprofen crude product mother liquor storage tank, a liquid alkali storage tank, an ibuprofen crude product mother liquor feed pump, a one-level frequency conversion liquid alkali diaphragm pump, a two-level frequency conversion liquid alkali diaphragm pump, a three-level frequency conversion liquid alkali diaphragm pump, a one-level frequency conversion liquid alkali diaphragm pump circuit breaker, a two-level frequency conversion liquid alkali diaphragm pump circuit breaker, a three-level frequency conversion liquid alkali diaphragm pump circuit breaker, an ibuprofen crude product mother liquor stock solution on-line pH detection device, a one-level on-line pH detection device, a two-level on-line pH detection device, a three-level on-line pH detection device, a PLC controller, a one-level mixer, a two-level mixer and a three-level mixer.
Separating the ibuprofen crude product mother liquor by a centrifuge, feeding the separated ibuprofen crude product mother liquor into an ibuprofen crude product mother liquor storage tank, and feeding the ibuprofen crude product mother liquor into an ibuprofen crude product mother liquor on-line pH detection device by an ibuprofen crude product mother liquor feeding pump; feeding back the pH value of the crude product mother liquor to a PLC (programmable logic controller) through an on-line pH detection signal of the crude product mother liquor, outputting a corresponding control signal according to the pH value of the crude product mother liquor by the PLC, transmitting the control signal to a first-stage frequency conversion liquid alkali diaphragm pump, controlling the frequency conversion regulation trend and the frequency conversion regulation period of the first-stage frequency conversion liquid alkali diaphragm pump in an interlocking manner, further controlling liquid alkali in a liquid alkali storage tank to enter the flow of the crude product mother liquor of the ibuprofen, mixing the liquid alkali and the crude product mother liquor by a first-stage mixer, performing first-stage on-line pH regulation detection by a first-stage on-line pH detection device, transmitting a signal to the PLC, and feeding back a signal to a first-stage liquid alkali breaker to stop the operation of the first-stage frequency conversion liquid alkali diaphragm pump; meanwhile, the PLC outputs a corresponding control signal to the second-stage variable-frequency liquid alkali diaphragm pump according to the first-stage online pH value, the variable-frequency regulation trend and the variable-frequency regulation period of the second-stage variable-frequency liquid alkali diaphragm pump are controlled in an interlocking manner, the flow of liquid alkali in the liquid alkali storage tank into the first-stage mixed liquid is controlled, the first-stage mixed liquid and the liquid alkali are mixed through the second-stage mixer, second-stage online pH regulation detection is carried out through the second-stage online pH detection device, a signal is transmitted to the PLC, and the signal is fed back to the second-stage variable-frequency liquid alkali diaphragm pump breaker to stop the operation of the second-stage variable-frequency liquid alkali diaphragm pump. Meanwhile, the PLC outputs a corresponding control signal to the three-level variable frequency liquid alkali diaphragm pump according to the second-level online pH value, the frequency conversion regulation trend and the frequency conversion regulation period of the three-level variable frequency liquid alkali diaphragm pump are controlled in an interlocking manner, the flow of liquid alkali in the liquid alkali storage tank into the second-level mixed liquid is controlled, the second-level mixed liquid and the liquid alkali are mixed through the three-level mixer, three-level online pH regulation detection is carried out through the three-level online pH detection device, the signal is transmitted to the PLC, and the signal is fed back to the circuit breaker of the three-level variable frequency liquid alkali diaphragm pump to stop the operation of the three-level variable frequency liquid alkali diaphragm pump.
The ibuprofen crude product mother liquor feed pump is in linkage control with the first-stage variable frequency liquid alkali diaphragm pump, the second-stage variable frequency liquid alkali diaphragm pump and the third-stage variable frequency liquid alkali diaphragm pump respectively, so that liquid alkali continuous automation is ensured to adjust the pH value within a corresponding set range during continuous feeding of the ibuprofen crude product mother liquor. When the ibuprofen crude product mother liquor feed pump runs, the primary variable frequency liquid alkali diaphragm pump, the secondary variable frequency liquid alkali diaphragm pump and the tertiary variable frequency liquid alkali diaphragm pump run in a chain manner in succession; and when the ibuprofen crude product mother liquor feeding pump stops, the first-stage variable frequency liquid alkali diaphragm pump, the second-stage variable frequency liquid alkali diaphragm pump and the third-stage variable frequency liquid alkali diaphragm pump stop in a linkage manner in succession.
In the variable-frequency liquid alkali diaphragm pumps, a first-stage variable-frequency liquid alkali diaphragm pump is a wide-range regulating pump, the acquisition period is 3 minutes per time, and the variable-frequency regulating amplitude is 1-3 Hz per period; the two-stage variable frequency liquid alkali diaphragm pump is a small-range regulating pump, the acquisition period is 3 minutes/time, and the variable frequency regulation amplitude is 0.5-2 Hz/period; the three-stage variable frequency liquid alkali diaphragm pump is a small-range regulating pump, the acquisition period is 3 minutes/time, and the variable frequency regulation amplitude is 0.5-2 Hz/period. The frequency conversion liquid alkali diaphragm pump respectively adopts frequency increasing or frequency reducing adjustment through the feedback of an online pH detection signal transmitted by the online pH detection device, and further controls the pH within a set range.
The utility model provides an automatic adjust device of ibuprofen crude mother liquor pH makes and transfers pH more convenient, accurate, simultaneously can automatic control liquid caustic soda feed volume in succession, avoids the waste of liquid caustic soda raw materials, effectively solves above-mentioned problem.
Compared with the prior art, a device of automatically regulated ibuprofen crude product mother liquor pH have following beneficial effect: the utility model basically realizes continuous and automatic treatment, greatly reduces the labor cost and improves the labor production efficiency; meanwhile, the error generated by manual operation is eliminated, the pH value of the ibuprofen crude product mother liquor is adjusted and controlled accurately, the mother liquor treatment qualified rate is improved, the waste of liquid caustic soda raw materials is further avoided, and the production cost of the ibuprofen raw materials is greatly reduced.
Drawings
FIG. 1 is a schematic flow chart of the present invention;
in fig. 1: 1. a centrifuge; 2. storing a crude ibuprofen mother liquor; 3. a liquid caustic soda storage tank; 4. a crude ibuprofen mother liquor feeding pump; 5. a first-stage variable frequency liquid alkali diaphragm pump; 6. a second-stage variable frequency liquid alkali diaphragm pump; 7. a three-stage variable frequency liquid alkali diaphragm pump; 8. a breaker of a first-stage variable frequency liquid alkali diaphragm pump; 9. a circuit breaker of a second-stage variable frequency liquid alkali diaphragm pump; 10. a breaker of a three-stage variable frequency liquid alkali diaphragm pump; 11. an ibuprofen crude product mother liquor stock solution on-line pH detection device; 12. a first-stage online pH detection device; 13. a secondary on-line pH detection device; 14. a third-stage online pH detection device; 15. a PLC controller; 16. a first-stage mixer; 17. a secondary mixer; 18. a three-stage mixer.
Detailed Description
Example 1
With reference to the attached figure 1, opening a tank bottom valve of an ibuprofen crude product mother liquid storage tank 2, starting an ibuprofen crude product mother liquid feed pump 4, controlling the feed amount of the ibuprofen crude product mother liquid at 20000-21000m3/h, opening a tank bottom valve of a liquid alkali storage tank 3, sequentially starting a first-stage frequency conversion liquid alkali diaphragm pump 5, a second-stage frequency conversion liquid alkali diaphragm pump 6 and a third-stage frequency conversion liquid alkali diaphragm pump 7, and sequentially opening a linkage valve of the ibuprofen crude product mother liquid feed pump 4, the first-stage frequency conversion liquid alkali diaphragm pump 5, the second-stage frequency conversion liquid alkali diaphragm pump 6 and the third-stage frequency conversion liquid alkali diaphragm pump 7;
the ibuprofen crude product mother liquor enters an ibuprofen crude product mother liquor raw liquor on-line pH detection device 11 through an ibuprofen crude product mother liquor feeding pump 4; feeding back the pH value (2-3) of a crude product mother liquor to a PLC (programmable logic controller) 15 through a detection signal of an ibuprofen crude product mother liquor online pH detection device 11, outputting a corresponding control signal to a first-stage frequency conversion liquid alkali diaphragm pump 5 by the PLC 15 according to the pH value of the crude product mother liquor, controlling the frequency conversion regulation trend and the frequency conversion regulation period of the first-stage frequency conversion liquid alkali diaphragm pump 5 in an interlocking manner, further controlling the flow of liquid alkali in a liquid alkali storage tank 3 into the ibuprofen crude product mother liquor, mixing the liquid alkali and the crude product mother liquor through a first-stage mixer 16, carrying out first-stage online pH regulation (the first-stage pH control range is 3-5, the pH set value is 4) through a first-stage online pH detection device 12, transmitting a signal to the PLC 15, and feeding back the signal to a first-stage frequency conversion liquid alkali diaphragm pump breaker 8 to stop the operation of the first-stage frequency conversion liquid alkali diaphragm pump 5; meanwhile, the PLC 15 outputs a corresponding control signal according to the first-stage online pH value and transmits the control signal to the second-stage variable frequency liquid alkali diaphragm pump 6, the variable frequency regulation trend and the variable frequency regulation period of the second-stage variable frequency liquid alkali diaphragm pump 6 are controlled in an interlocking manner, the flow of liquid alkali in the liquid alkali storage tank 3 into the first-stage mixed liquid is further controlled, the first-stage mixed liquid and the liquid alkali are mixed by the second-stage mixer 17, the second-stage online pH regulation (the second-stage pH control range is 5-6, and the pH set value is 5.5) detection is carried out by the second-stage online pH detection device 13, a signal is transmitted to the PLC 15, and the signal is fed back to the second-stage variable frequency liquid alkali diaphragm pump breaker 9 to stop the operation of the second-stage variable frequency liquid alkali diaphragm pump 6. Meanwhile, the PLC 15 outputs a corresponding control signal according to the second-stage online pH value to the third-stage variable frequency liquid alkali diaphragm pump 7, the variable frequency regulation trend and the variable frequency regulation period of the third-stage variable frequency liquid alkali diaphragm pump 7 are controlled in an interlocking manner, the flow of liquid alkali in the liquid alkali storage tank 3 into second-stage mixed liquid is further controlled, the second-stage mixed liquid and the liquid alkali are mixed by the third-stage mixer 18, the third-stage online pH regulation (the third-stage pH control range: 6-7, the pH set value being 6.5) is detected by the third-stage online pH detection device 14, a signal is transmitted to the PLC 15, and the signal is fed back to the breaker 10 of the third-stage variable frequency liquid alkali diaphragm pump to stop the operation of the third-stage variable frequency liquid alkali diaphragm pump 7.
The pH of the ibuprofen crude product mother liquor after being subjected to primary, secondary and tertiary liquid caustic soda pH automatic adjustment is accurately controlled to be 6-7, the ibuprofen crude product mother liquor meets the qualified standard of environment-friendly treated water, and the ibuprofen crude product mother liquor can be subjected to next-step discharge treatment.
In a specific embodiment, in the variable-frequency liquid alkali diaphragm pumps, a first-stage variable-frequency liquid alkali diaphragm pump 5 is a wide-range adjusting pump, the acquisition period is 3 minutes/time, and when the pH value is 2-4, the first-stage variable-frequency liquid alkali diaphragm pump 5 adopts an ascending frequency adjusting trend; when the pH value is 4-10, the frequency of the first-stage variable frequency liquid alkali diaphragm pump 5 is kept unchanged; when the pH value is above 10, the primary variable-frequency liquid alkali diaphragm pump 5 adopts a frequency reduction regulation trend, and the variable-frequency regulation amplitude is 1-3 Hz/cycle; the second-stage frequency conversion liquid caustic soda diaphragm pump 6 is a small-range adjusting pump, the acquisition period is 3 minutes/time, and the second-stage frequency conversion liquid caustic soda diaphragm pump 6 adopts the frequency-increasing adjusting trend when the pH value is 3-5; when the pH value is 5-8, the frequency of the second-stage variable frequency liquid alkali diaphragm pump 6 is kept unchanged; when the pH value is more than 8, the secondary frequency conversion liquid alkali diaphragm pump 6 adopts a frequency reduction regulation trend, and the frequency conversion regulation amplitude is 0.5-2 Hz/cycle; the three-stage frequency conversion liquid caustic soda diaphragm pump 7 is a small-range adjusting pump, the acquisition period is 3 minutes/time, and the three-stage frequency conversion liquid caustic soda diaphragm pump 7 adopts the frequency-increasing adjusting trend when the pH value is 3-5; when the pH value is 5-8, the frequency of the three-stage variable frequency liquid alkali diaphragm pump 7 is kept unchanged; when the pH value is more than 8, the three-stage variable frequency liquid alkali diaphragm pump 7 adopts a frequency reduction regulation trend, and the frequency conversion regulation amplitude is 0.5-2 Hz/cycle; the frequency conversion liquid alkali diaphragm pump respectively adopts frequency increasing or frequency reducing adjustment through the feedback of an online pH detection signal transmitted by the online pH detection device, and further controls the pH within a set range. The treatment qualification rate of the ibuprofen crude product mother liquor is improved, and meanwhile, the ibuprofen crude product mother liquor is continuously fed and the liquid caustic soda is continuously and automatically adjusted in pH value to operate, so that the production efficiency is greatly improved.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement performed by those skilled in the art within the technical scope of the present invention should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (4)
1. The utility model provides an automatic adjust device of ibuprofen crude mother liquor pH which characterized in that: the device comprises a centrifugal machine (1), an ibuprofen crude product mother liquor storage tank (2), a caustic soda liquid storage tank (3), an ibuprofen crude product mother liquor feed pump (4), a first-stage frequency conversion caustic soda liquid diaphragm pump (5), a second-stage frequency conversion caustic soda liquid diaphragm pump (6), a third-stage frequency conversion caustic soda liquid diaphragm pump (7), a first-stage frequency conversion caustic soda liquid diaphragm pump circuit breaker (8), a second-stage frequency conversion caustic soda liquid diaphragm pump circuit breaker (9), a third-stage frequency conversion caustic soda liquid diaphragm pump circuit breaker (10), an ibuprofen crude product mother liquor online pH detection device (11), a first-stage online pH detection device (12), a second-stage online pH detection device (13), a third-stage online pH detection device (14), a PLC controller (15), a first-stage mixer (16), a second-stage mixer (17) and a third-stage mixer (18).
2. The device for automatically adjusting the pH value of the mother liquor of the ibuprofen crude product according to claim 1, characterized in that:
the ibuprofen crude product mother liquor is separated out by a centrifuge (1) and then enters an ibuprofen crude product mother liquor storage tank (2), and enters an ibuprofen crude product mother liquor stock solution on-line pH detection device (11) through an ibuprofen crude product mother liquor feeding pump (4); feeding back the pH value of the crude product mother liquor to a PLC (programmable logic controller) 15 through an on-line pH detection signal of the crude product mother liquor, outputting a corresponding control signal to a first-stage frequency conversion liquid alkali diaphragm pump (5) by the PLC (15) according to the pH value of the crude product mother liquor, controlling the frequency conversion regulation trend and the frequency conversion regulation period of the first-stage frequency conversion liquid alkali diaphragm pump (5) in an interlocking manner, further controlling the flow of liquid alkali in a liquid alkali storage tank (3) into the crude product mother liquor of ibuprofen, mixing the liquid alkali and the crude product mother liquor through a first-stage mixer (16), performing first-stage on-line pH regulation detection through a first-stage on-line pH detection device (12), transmitting a signal to the PLC (15), and feeding back a signal to a first-stage frequency conversion liquid alkali diaphragm pump circuit breaker (8) to stop the operation of the first-stage frequency conversion liquid alkali diaphragm pump (5); meanwhile, the PLC (15) outputs a corresponding control signal according to the primary online pH value and transmits the control signal to the secondary variable-frequency liquid alkali diaphragm pump (6), the variable-frequency regulation trend and the variable-frequency regulation period of the secondary variable-frequency liquid alkali diaphragm pump (6) are controlled in an interlocking manner, so that liquid alkali in the liquid alkali storage tank (3) is controlled to enter the flow of primary mixed liquid, the primary mixed liquid and the liquid alkali are mixed by a secondary mixer (17), secondary online pH regulation detection is carried out by a secondary online pH detection device (13), a signal is transmitted to the PLC (15), and the signal is fed back to the secondary variable-frequency liquid alkali diaphragm pump (9) to stop the operation of the secondary variable-frequency liquid alkali diaphragm pump (6); meanwhile, the PLC (15) outputs a corresponding control signal to the three-level variable frequency liquid alkali diaphragm pump (7) according to the second-level online pH value, the frequency conversion regulation trend and the frequency conversion regulation period of the three-level variable frequency liquid alkali diaphragm pump (7) are controlled in an interlocking manner, so that liquid alkali in the liquid alkali storage tank (3) is controlled to enter the flow of second-level mixed liquid, the second-level mixed liquid and the liquid alkali are mixed by the three-level mixer (18), three-level online pH regulation detection is carried out through the three-level online pH detection device, a signal is transmitted to the PLC (15), and the signal is fed back to the three-level liquid alkali breaker to stop the operation of the three-level variable frequency liquid alkali diaphragm pump (7).
3. The device for automatically adjusting the pH of the crude ibuprofen mother liquor according to claim 1 or 2, which is characterized in that: the ibuprofen crude product mother liquor feed pump (4) is respectively in linkage control with the first-stage frequency conversion liquid alkali diaphragm pump (5), the second-stage frequency conversion liquid alkali diaphragm pump (6) and the third-stage frequency conversion liquid alkali diaphragm pump (7), so that liquid alkali is continuously and automatically adjusted to adjust the pH value within a corresponding set range when the ibuprofen crude product mother liquor is continuously fed; when the ibuprofen crude product mother liquor feeding pump (4) operates, the first-stage frequency conversion liquid alkali diaphragm pump (5), the second-stage frequency conversion liquid alkali diaphragm pump (6) and the third-stage frequency conversion liquid alkali diaphragm pump (7) operate in a chain manner in succession; and when the ibuprofen crude product mother liquor feeding pump (4) stops, the first-stage variable frequency liquid alkali diaphragm pump (5), the second-stage variable frequency liquid alkali diaphragm pump (6) and the third-stage variable frequency liquid alkali diaphragm pump (7) stop in a linkage manner in succession.
4. The device for automatically adjusting the pH of the crude ibuprofen mother liquor according to claim 1 or 2, which is characterized in that: in the variable-frequency liquid caustic soda diaphragm pumps, a primary variable-frequency liquid caustic soda diaphragm pump (5) is a wide-range regulating pump, the acquisition period is 3 minutes/time, and the variable-frequency regulating amplitude is 1-3 Hz/period; the second-stage variable-frequency liquid alkali diaphragm pump (6) is a small-range regulating pump, the acquisition cycle is 3 minutes/time, and the variable-frequency regulating amplitude is 0.5-2 Hz/cycle; the three-stage variable frequency liquid alkali diaphragm pump (7) is a small-range regulating pump, the acquisition period is 3 minutes/time, and the variable frequency regulating amplitude is 0.5-2 Hz/period; the frequency conversion liquid alkali diaphragm pump respectively adopts frequency increasing or frequency reducing adjustment through the feedback of an online pH detection signal transmitted by the online pH detection device, and further controls the pH within a set range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122713691.8U CN217418295U (en) | 2021-11-08 | 2021-11-08 | Device for automatically adjusting pH of ibuprofen crude product mother liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122713691.8U CN217418295U (en) | 2021-11-08 | 2021-11-08 | Device for automatically adjusting pH of ibuprofen crude product mother liquor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217418295U true CN217418295U (en) | 2022-09-13 |
Family
ID=83168772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122713691.8U Active CN217418295U (en) | 2021-11-08 | 2021-11-08 | Device for automatically adjusting pH of ibuprofen crude product mother liquor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217418295U (en) |
-
2021
- 2021-11-08 CN CN202122713691.8U patent/CN217418295U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103695569B (en) | Preliming reactor and method | |
| CN217418295U (en) | Device for automatically adjusting pH of ibuprofen crude product mother liquor | |
| CN104975317A (en) | Automatic-control liquid distribution and supply system for formation process liquid | |
| CN113860465A (en) | Continuous automatic pH processing system that transfers of ibuprofen crude mother liquor liquid alkali | |
| CN208791267U (en) | Lime automatic medicine adding apparatus in a kind of sewage disposal system | |
| CN218392397U (en) | Automatic control and monitoring system for primary saline-alkali mud filter press | |
| CN109402300B (en) | Xylose mother liquor continuous saturation impurity removing equipment and method | |
| CN204933450U (en) | A kind of reaction unit of automatic adjustment pH value of solution | |
| CN107583482A (en) | Sugar refinery molasses serial dilution intelligence control system | |
| CN212954949U (en) | Chlorobutane continuous production device | |
| CN211585289U (en) | Continuous constant concentration crystallization device | |
| CN104028128A (en) | Automatic alkali preparing device for production of casein | |
| CN203238084U (en) | Device for treating printing and dyeing wastewater | |
| CN203238126U (en) | Equipment for treating dyeing wastewater | |
| CN207115211U (en) | A kind of pre- grey automatic control system of two-stage | |
| CN206256073U (en) | One kind size mixing starch milk automatically continuously enzyme-added and PH regulating systems | |
| CN101386894B (en) | Sugar melting equipment and method in anhydrous dextrose production | |
| CN104211093B (en) | Sodium Pyrosulfite automatic blending adder-subtractor and method | |
| CN217796122U (en) | Controllable continuous gas production combination device | |
| CN220432359U (en) | Sodium hypophosphite solution continuous treatment device | |
| CN107541453A (en) | The intelligent charging system of one primary yeast fermentation tank | |
| CN208228223U (en) | A kind of compensating cylinder for liquid material charging | |
| CN100445198C (en) | Graded chlorine dioxide generator | |
| CN217549763U (en) | Automatic adjusting and batching device for producing sodium fluosilicate | |
| CN214654138U (en) | Softening and precipitating system for coal mine water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |