CN214457492U - Demulsification technical system for treating wastewater containing emulsified oil agent - Google Patents
Demulsification technical system for treating wastewater containing emulsified oil agent Download PDFInfo
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- CN214457492U CN214457492U CN202120008202.6U CN202120008202U CN214457492U CN 214457492 U CN214457492 U CN 214457492U CN 202120008202 U CN202120008202 U CN 202120008202U CN 214457492 U CN214457492 U CN 214457492U
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- 239000002351 wastewater Substances 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000002156 mixing Methods 0.000 claims abstract description 26
- 239000010802 sludge Substances 0.000 claims abstract description 22
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 22
- 238000004062 sedimentation Methods 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000001110 calcium chloride Substances 0.000 claims abstract description 4
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 4
- 238000005273 aeration Methods 0.000 claims description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 14
- 229910052760 oxygen Inorganic materials 0.000 claims description 14
- 239000001301 oxygen Substances 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 13
- 239000012528 membrane Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 6
- 238000005276 aerator Methods 0.000 claims description 4
- 238000005188 flotation Methods 0.000 claims description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
- 239000008041 oiling agent Substances 0.000 claims 3
- 238000000034 method Methods 0.000 description 10
- 239000000839 emulsion Substances 0.000 description 7
- 229920002401 polyacrylamide Polymers 0.000 description 7
- 239000003814 drug Substances 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000004945 emulsification Methods 0.000 description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000005374 membrane filtration Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005185 salting out Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 230000036983 biotransformation Effects 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 238000005354 coacervation Methods 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- QNBVYCDYFJUNLO-UHFFFAOYSA-N pralidoxime iodide Chemical compound [I-].C[N+]1=CC=CC=C1\C=N\O QNBVYCDYFJUNLO-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
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Abstract
The utility model discloses a demulsification technical system for treating wastewater containing emulsified oil agent; the system comprises a demulsification device, a sedimentation tank, an air floatation tank, a biochemical combined tank and an MBR tank which are connected in sequence; a sludge outlet of the MBR tank is connected with a sludge concentration tank; the demulsification device comprises a low-concentration wastewater treatment unit, an emulsified oil-containing wastewater treatment unit and a buffer water tank which is respectively connected with the low-concentration wastewater treatment unit and the emulsified oil-containing wastewater treatment unit; the water outlet of the buffer tank is connected with the water inlet of the sedimentation tank; the emulsified oil-containing wastewater treatment unit comprises a high-concentration regulating tank and a mixing tank, wherein the mixing tank is connected with a PAM dosing device, a PAC dosing device and CaCl2The dosing device is connected with the sulfuric acid dosing device, and the mixed water outlet of the mixing tank is connected with the buffer water tank. The demulsification device in the system has the advantages of medium dosage, strong demulsification capacity and wide application range, and is particularly suitable for emulsified oil difficult to demulsify.
Description
Technical Field
The utility model relates to a special system of breakdown of emulsion technique especially relates to a breakdown of emulsion technical system for handling contain emulsification form finish waste water.
Background
With the rapid development of modern industries, in industries such as metal processing, a large amount of lubricants are used in processes such as cutting machine parts and drawing steel wires, and such lubricants are mostly oil-in-water emulsions, and these oil solutions containing emulsions have extremely small particle sizes and form water-oil emulsions in water. The waste water containing emulsified oil agent has high surfactant content, stable system and great oil content, and the key technology for treating the waste water containing emulsified oil agent is demulsification and oil removal. At present, the common demulsification methods comprise salting out method, coagulation method and acidification method.
The salting-out method has good oil quality and is convenient to recover, but the adding dosage is large, and the salt content in water is large. The coacervation method has less dosage, but has poor oil quality and much viscous and thick water. The acidification method has good water quality, but generates more sludge.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a throw the dose and moderate, the breakdown of emulsion ability is strong, and area is little, and the wide breakdown of emulsion technical system who is used for handling containing emulsification form finish waste water that adapts to also is called to contain emulsification form finish waste water treatment system.
The purpose of the utility model is realized through the following technical scheme:
the utility model relates to a wastewater treatment system containing emulsified oil, which comprises a demulsification device, a sedimentation tank, an air flotation tank, a biochemical combined tank and an MBR tank which are connected in sequence; a sludge outlet of the MBR tank is connected with a sludge concentration tank; the demulsification device comprises a low-concentration wastewater treatment unit, an emulsified oil-containing wastewater treatment unit and a buffer water tank which is respectively connected with the low-concentration wastewater treatment unit and the emulsified oil-containing wastewater treatment unit; the water outlet of the buffer tank is connected with the water inlet of the sedimentation tank; the emulsified oil-containing wastewater treatment unit comprises a high-concentration regulating tank and a mixing tank, wherein the mixing tank is connected with a PAM dosing device, a PAC dosing device and CaCl2、The chemical adding device is connected with the sulfuric acid chemical adding device, and the mixed water outlet of the mixing tank is connected with the buffer water tank.
Further, low dense waste water treatment unit includes low concentration equalizing basin and first blending tank, first blending tank links to each other with PAM charge device, PAC charge device, the mixed delivery port of first blending tank with the buffer pool links to each other.
Furthermore, a mechanical filter is arranged above the low-concentration regulating reservoir.
Furthermore, a PAM dosing device and a PAC dosing device are further arranged on the sedimentation tank.
Further, the biochemical combined tank comprises an anaerobic tank and an aerobic aeration tank. And a residual sludge outlet of the aerobic aeration tank is connected with a sludge concentration tank.
Further, the concentration of dissolved oxygen in the aerobic aeration tank is controlled to be more than 2 mg/L; the sludge concentration is controlled to be 3-5 Gtss/L.
Furthermore, the aerobic aeration tank is provided with a jet aerator.
Furthermore, a dissolved oxygen instrument is arranged at the tail end of the aerobic aeration tank.
Furthermore, the system also comprises a primary RO membrane system, and the wastewater in the MBR tank is discharged outside after passing through the primary RO membrane system.
Further, the system also comprises a filter pressing system, and the sludge in the sludge concentration tank is dehydrated and discharged outside through the filter pressing system.
Further, the filter pressing system adopts a belt dehydrator.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the demulsification device in the system of the utility model has the advantages of moderate dosage, strong demulsification capability, wide application range and is particularly suitable for emulsified oil which is difficult to demulsify;
2. the MBR tank in the system of the utility model combines the traditional biological treatment technology and the membrane filtration biological reaction liquid phase, and the effluent is filtered by the membrane, so that the water quality is better; all microorganisms are trapped in the bioreactor by membrane filtration, so that the efficiency of the bioreactor is greatly improved, some difficultly degraded substances are degraded, and the occupied area is greatly reduced;
3. the biochemical combined tank in the system of the utility model comprises an anaerobic tank and an aerobic aeration tank, the aeration mode adopts a jet aeration mode, and an air blower room does not need to be built, and an air distribution pipeline and an aeration head do not need to be arranged, so that the system has simple and centralized facilities and good treatment effect; designing a plurality of sets of jet aerators according to the actual oxygen amount required by the aerobic aeration tank, and adopting variable frequency control; and a dissolved oxygen meter can be arranged at the tail end of the aeration tank, and the dissolved oxygen concentration of the aeration tank can be continuously monitored.
Drawings
FIG. 1 is a flow chart of the wastewater treatment system containing emulsified oil of the present invention;
FIG. 2 is a structural diagram of a demulsification device in an emulsified oil-containing wastewater treatment system;
wherein, 1-mechanical filter, 2-PAM dosing device, 3-PAC dosing device, 4-CaCl2The device comprises a dosing device, a 5-sulfuric acid dosing device, a 6-lift pump, a 7-first mixing tank, a 8-low concentration regulating reservoir, a 9-buffer water tank, a 10-high concentration regulating reservoir, a 11-second mixing tank and a 12-third mixing tank.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific examples. Meanwhile, the embodiments described below are merely to explain the present invention.
Examples
The embodiment relates to a wastewater treatment system containing emulsified oil, which comprises a demulsification device, a sedimentation tank, an air flotation tank, a biochemical combined tank, an MBR tank, a primary RO membrane system, a sludge concentration tank and a belt dehydrator, which are sequentially connected with one another as shown in figure 1.
The demulsification device is shown in figure 2, factory domestic sewage is discharged into a low-concentration regulating tank 8 after passing through a mechanical filter 1, is pumped into a first mixing tank 7 through a lift pump 6, is added with medicines in the first mixing tank 7 through a PAM (polyacrylamide) medicine adding device 2 and a PAC (polyaluminium chloride) medicine adding device 3, and is discharged into a buffer water tank 9 after being mixed;
the wastewater containing the emulsified oil agent is discharged into a high concentration regulating tank 10, pumped to a second mixing tank 11 through a lift pump 6, and then passes through a PAC dosing device 3 and CaCl in the second mixing tank 112、The chemical adding device 4 and the sulfuric acid chemical adding device 5 add chemical and then enter a third mixing tank12, adding the medicines into the third mixing tank 12 through a PAM medicine adding device 2, mixing and discharging into a buffer water tank 9;
the two waste waters are mixed and adjusted in a buffer pool and then discharged into a sedimentation tank.
And a PAM dosing device and a PAC dosing device are also arranged on the sedimentation tank. The wastewater is discharged into an air floatation tank after being precipitated in a sedimentation tank, a large amount of air is dissolved into the water by using an air dissolving system to form air dissolving water, the air dissolving water enters the water to be treated, a large amount of micro bubbles are formed in the water after decompression and release, the bubbles are mutually adhered with impurities and flocs in the water to form a floating body with the specific gravity smaller than that of the water, so that the floating body quickly floats out of the water surface, the solid and liquid phases are separated after being skimmed by a slag scraping device, and oil substances in the wastewater are removed by using an air floatation treatment mechanism;
the effluent of the air floatation tank is discharged into a biochemical combined tank, the biochemical combined tank comprises an anaerobic tank and an aerobic aeration tank, in the anaerobic conversion, under the condition of no need of flushing oxygen, most of the energy of organic matters is converted into the form of methane, so that only a small part of the energy is used for synthesizing cell substances, the part of the energy is released, the generated methane can be used for boiler combustion or heating, and the main purpose of the aerobic treatment is to make biodegradable CODcrConversion to CO2And H2O, in order to convert the organic substances smoothly, two parameters must be properly controlled, and a sufficient dissolved oxygen concentration in the aeration tank is maintained for a while to provide sufficient oxygen for the microorganisms, and the dissolved oxygen concentration is usually more than 2 mg/L. And secondly, sufficient active sludge concentration is maintained in the aeration tank for biotransformation, and the sludge concentration in the aeration tank of the chemical wastewater can be maintained at 3-5 Gtss/L. In addition, in order to improve the aeration effect and save the cost, as a preferable scheme of the embodiment, the aeration mode of the aerobic aeration tank adopts a jet aeration mode; according to the actual oxygen amount needed by the aerobic aeration tank, a plurality of sets of jet aerators are designed and frequency conversion control is adopted. In addition, in order to continuously monitor the dissolved oxygen concentration of the aeration tank, a dissolved oxygen meter can be arranged at the tail end of the aerobic aeration tank.
Discharging the biochemically treated wastewater into an MBR tank, retaining active sludge and macromolecular organic matters in a biochemical reaction tank by utilizing membrane separation equipment, wherein the hydraulic retention time and the sludge retention time can be respectively controlled, and the refractory substances are continuously reacted and degraded in a reactor; on the other hand, due to the high filtering precision of the membrane, the effluent is ensured to be clear and transparent, so that a secondary sedimentation tank is omitted. Thus, the MBR process greatly enhances the bioreactor function through membrane separation techniques.
Sludge in the MBR tank enters a sludge concentration tank, is dewatered by a belt dewaterer and is discharged;
and (4) enabling the wastewater in the MBR tank to enter a first-stage RO membrane system, and discharging the wastewater after desalination and softening treatment by the RO system.
The system is applied and implemented in a Zhejiang spare and accessory processing factory, and main products of the factory are modified polyester chips and differentiated polyester industrial fiber materials used in the fields of automobile industry, building engineering, packaging materials, leisure sports, protection facilities and the like. The design scale of the wastewater is 2000m3/d, and the inlet water quality is as follows:
| contamination factor | CODcr(mg/L) | BOD5(mg/L) | Ammonia nitrogen (mg/L) | pH |
| High concentration waste water | ≤50000 | / | ≤100 | 6～9 |
After the treatment of the system, the wastewater reaches the third-level standard in the Integrated wastewater discharge Standard (GB8978-1996), wherein the ammonia nitrogen and the total phosphorus reach the standard of the Water quality Standard for wastewater discharged into urban sewer lines (CJ 343-2010).
The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (10)
1. A demulsification technical system for treating wastewater containing emulsified oil is characterized by comprising a demulsification device, a sedimentation tank, an air flotation tank, a biochemical combined tank and an MBR tank which are connected in sequence; a sludge outlet of the MBR tank is connected with a sludge concentration tank;
the demulsification device comprises a low-concentration wastewater treatment unit, an emulsified oil-containing wastewater treatment unit and a buffer water tank which is respectively connected with the low-concentration wastewater treatment unit and the emulsified oil-containing wastewater treatment unit; the water outlet of the buffer water tank is connected with the water inlet of the sedimentation tank;
the emulsified oil-containing wastewater treatment unit comprises a high-concentration regulating tank and a mixing tank, wherein the mixing tank is connected with a PAM dosing device, a PAC dosing device and CaCl2、The chemical adding device is connected with the sulfuric acid chemical adding device, and the mixed water outlet of the mixing tank is connected with the buffer water tank.
2. The demulsification technical system for treating wastewater containing emulsified oil agents as claimed in claim 1, wherein the low-concentration wastewater treatment unit comprises a low-concentration regulating tank and a first mixing tank, the first mixing tank is connected with a PAM dosing device and a PAC dosing device, and a mixing water outlet of the first mixing tank is connected with the buffer water tank.
3. The demulsification technical system for treating the wastewater containing the emulsified oil agent as claimed in claim 2, wherein a mechanical filter is arranged above the low-concentration regulating reservoir.
4. The demulsification technical system for treating wastewater containing emulsified oil agents as claimed in claim 1, wherein the biochemical combination tank comprises an anaerobic tank and an aerobic aeration tank.
5. The demulsification technical system for treating the waste water containing the emulsified oiling agent as claimed in claim 4, wherein the concentration of the dissolved oxygen in the aerobic aeration tank is controlled to be more than 2 mg/L; the sludge concentration is controlled to be 3-5 Gtss/L.
6. The demulsification technical system for treating the waste water containing the emulsified oiling agent as claimed in claim 4, wherein the aerobic aeration tank is provided with a jet aerator.
7. The demulsification technical system for treating the waste water containing the emulsified oiling agent as claimed in claim 4, wherein the tail end of the aerobic aeration tank is provided with a dissolved oxygen instrument.
8. The demulsification technical system for treating wastewater containing emulsified oil according to claim 1, wherein the system further comprises a primary RO membrane system, and wastewater in the MBR tank is discharged after passing through the primary RO membrane system.
9. The demulsification technical system for treating wastewater containing emulsified oil agents as claimed in claim 1, wherein the system further comprises a filter pressing system, and the sludge in the sludge concentration tank is dehydrated and discharged outside through the filter pressing system.
10. The demulsification technical system for treating wastewater containing emulsified oil agents as claimed in claim 9, wherein the filter pressing system adopts a belt dehydrator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120008202.6U CN214457492U (en) | 2021-01-05 | 2021-01-05 | Demulsification technical system for treating wastewater containing emulsified oil agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120008202.6U CN214457492U (en) | 2021-01-05 | 2021-01-05 | Demulsification technical system for treating wastewater containing emulsified oil agent |
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| CN214457492U true CN214457492U (en) | 2021-10-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117735781A (en) * | 2024-01-11 | 2024-03-22 | 湖北卓森环境工程有限公司 | Industrial wastewater degradation equipment and processes |
| CN119874110A (en) * | 2025-02-27 | 2025-04-25 | 扬州德道市政设计院有限公司 | Multistage wastewater treatment pond |
-
2021
- 2021-01-05 CN CN202120008202.6U patent/CN214457492U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117735781A (en) * | 2024-01-11 | 2024-03-22 | 湖北卓森环境工程有限公司 | Industrial wastewater degradation equipment and processes |
| CN119874110A (en) * | 2025-02-27 | 2025-04-25 | 扬州德道市政设计院有限公司 | Multistage wastewater treatment pond |
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