CN111392919A - System and method for advanced treatment of bisphenol A wastewater - Google Patents
System and method for advanced treatment of bisphenol A wastewater Download PDFInfo
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- CN111392919A CN111392919A CN202010358748.4A CN202010358748A CN111392919A CN 111392919 A CN111392919 A CN 111392919A CN 202010358748 A CN202010358748 A CN 202010358748A CN 111392919 A CN111392919 A CN 111392919A
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- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 title claims abstract description 129
- 239000002351 wastewater Substances 0.000 title claims abstract description 107
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001179 sorption measurement Methods 0.000 claims abstract description 75
- 239000012528 membrane Substances 0.000 claims abstract description 62
- 238000000926 separation method Methods 0.000 claims abstract description 61
- 239000007788 liquid Substances 0.000 claims abstract description 43
- 238000003860 storage Methods 0.000 claims abstract description 41
- 239000002699 waste material Substances 0.000 claims abstract description 28
- 239000012466 permeate Substances 0.000 claims abstract description 21
- 230000003647 oxidation Effects 0.000 claims abstract description 18
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 18
- 230000020477 pH reduction Effects 0.000 claims abstract description 16
- 239000002253 acid Substances 0.000 claims description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 31
- 238000001704 evaporation Methods 0.000 claims description 17
- 230000008020 evaporation Effects 0.000 claims description 16
- 238000004140 cleaning Methods 0.000 claims description 14
- 238000004458 analytical method Methods 0.000 claims description 10
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 9
- 238000004064 recycling Methods 0.000 claims description 9
- 229910052708 sodium Inorganic materials 0.000 claims description 9
- 239000011734 sodium Substances 0.000 claims description 9
- 239000003513 alkali Substances 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 239000003463 adsorbent Substances 0.000 claims description 6
- 238000003843 chloralkali process Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 238000003795 desorption Methods 0.000 claims description 3
- 230000001737 promoting effect Effects 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 238000004065 wastewater treatment Methods 0.000 claims description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 24
- 239000000243 solution Substances 0.000 description 20
- 239000011780 sodium chloride Substances 0.000 description 12
- 239000012267 brine Substances 0.000 description 11
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 11
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 239000012847 fine chemical Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 208000017701 Endocrine disease Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 208000008589 Obesity Diseases 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
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- 239000003054 catalyst Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 210000003754 fetus Anatomy 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 208000030159 metabolic disease Diseases 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 235000020824 obesity Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
- C02F2101/345—Phenols
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a system and a method for advanced treatment of bisphenol A wastewater, wherein the system comprises a wastewater tank, a first booster pump, a wastewater acidification device, a first filter, a multi-frequency modified adsorption device, a Ph adjusting device, a second filter, a first membrane separation device, a permeate storage tank, a high TOC storage tank and a high-salt efficient oxidation device; the waste liquid tank, the first booster pump, the waste water acidification device, the first filter, the multi-frequency modified adsorption device, the Ph adjusting device, the second filter and the first membrane separation device are sequentially connected in series through pipelines; the permeate liquid outlet of the first membrane separation device is connected with the permeate liquid storage tank through a pipeline, the concentrated liquid outlet of the first membrane separation device is connected with the inlet of the high TOC storage tank through a pipeline, the inlet of the high-salt high-efficiency oxidation device is connected with the outlet of the high TOC storage tank through a pipeline, and the outlet of the high-salt high-efficiency oxidation device is connected with the inlet of the second filter through a pipeline. The invention treats and recycles bisphenol A wastewater, and achieves the purposes of energy conservation and emission reduction.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a system and a method for advanced treatment of bisphenol A wastewater.
Background
Bisphenol a, also known as BPA and known by the chemical name 2, 2-bis (4-hydroxyphenyl) propane, is used industrially to synthesize materials such as Polycarbonate (PC) and epoxy resins. There is a worldwide production of 2700 million tons of BPA-containing plastics, which can cause endocrine disorders that threaten the health of fetuses and children. Cancer and obesity caused by metabolic disorders are also considered to be associated therewith. Meanwhile, bisphenol A is also a common industrial compound and is mainly used for manufacturing fine chemical products, but a large amount of bisphenol A-containing wastewater is generated in the process of manufacturing the fine chemical products. At present, the discharge of bisphenol A wastewater from many factories seriously influences the ecological environment. Therefore, how to treat and reuse bisphenol A wastewater is an urgent problem to be solved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a system and a method for the advanced treatment of bisphenol A wastewater, so as to treat and recycle the bisphenol A wastewater and achieve the purposes of energy conservation and emission reduction.
On one hand, the invention provides a system for advanced treatment of bisphenol A wastewater, which comprises a wastewater tank, a first booster pump, a wastewater acidification device, a first filter, a multi-frequency modified adsorption device, a Ph adjusting device, a second filter, a first membrane separation device, a permeate storage tank, a high TOC storage tank and a high-salt efficient oxidation device; the waste liquid tank, the first booster pump, the waste water acidification device, the first filter, the multi-frequency modified adsorption device, the Ph adjusting device, the second filter and the first membrane separation device are sequentially connected in series through pipelines; the permeate liquid outlet of the first membrane separation device is connected with the permeate liquid storage tank through a pipeline, the concentrated liquid outlet of the first membrane separation device is connected with the inlet of the high TOC storage tank through a pipeline, the inlet of the high-salt high-efficiency oxidation device is connected with the outlet of the high TOC storage tank through a pipeline, and the outlet of the high-salt high-efficiency oxidation device is connected with the inlet of the second filter through a pipeline.
The acid cleaning system comprises an acid storage tank, a second booster pump and a second membrane separation device, an inlet of the second booster pump is connected with an outlet of the acid storage tank through a pipeline, an outlet of the second booster pump is connected with an acid cleaning inlet of the multi-frequency modified adsorption device through a pipeline, an inlet of the second membrane separation device is connected with an acid cleaning outlet of the multi-frequency modified adsorption device, a concentrated solution outlet of the second membrane separation device is connected into the waste liquid tank through a pipeline, and a permeate liquid outlet of the second membrane separation device is connected into the acid storage tank through a pipeline.
Further, still include MVR evaporation plant, MVR evaporation plant's entry linkage waste water is intake, MVR evaporation plant's export passes through the pipeline and inserts the waste liquid jar.
And the device further comprises a third booster pump and an active carbon adsorption device, wherein an inlet of the third booster pump is connected with an outlet of the permeate liquid storage tank through a pipeline, and an outlet of the third booster pump is connected with an inlet of the active carbon adsorption device through a pipeline.
In another aspect, the invention also provides a method for advanced treatment of bisphenol A wastewater, which comprises a water treatment step, wherein the water treatment step comprises the following steps:
step S1, introducing the wastewater into a wastewater acidification device, adjusting the pH value of the wastewater to 3-5, and promoting the bisphenol A sodium in the bisphenol A wastewater to be converted into bisphenol A;
step S2, introducing the wastewater discharged by the wastewater acidification device into a first filter, and intercepting large-particle impurities in the wastewater;
step S3, introducing the wastewater discharged by the first filter into a multi-frequency modified adsorption device to adsorb bisphenol A and CH in the wastewater2Cl2So that the value of bisphenol A at the outlet is less than or equal to 0.1 ppm;
step S4, introducing the wastewater discharged by the multi-frequency modified adsorption device into a Ph adjusting device, and adjusting the Ph value in the water to 10-11;
step S5, introducing the wastewater discharged by the Ph adjusting device into a second filter, and intercepting large-particle impurities in the wastewater;
and step S6, introducing the wastewater discharged by the second filter into the first membrane separation device, introducing the solution penetrating through the first membrane separation device into a chlor-alkali process section for recycling, introducing the concentrated solution intercepted by the first membrane separation device into a high-salt high-efficiency oxidation device, deeply removing COD (chemical oxygen demand) and purifying water quality of the wastewater, and returning the wastewater containing organic matters which are not degraded to the front of the second filter for further interception.
Further, the step S1 is preceded by a step of evaporating wastewater: the raw water of the wastewater is introduced into the MVR evaporation device to evaporate the wastewater in advance.
Further, the method also comprises an analyzing step, wherein the analyzing step comprises the following steps:
k1, after the water treatment step is stopped, introducing an alkali solution desorption liquid into the multi-frequency modified adsorption device to desorb the bisphenol A adsorbed on the adsorbent of the multi-frequency modified adsorption device, and directly returning the desorbed bisphenol A sodium to the pretreatment process section;
step K2, after the analysis is completed, introducing clear water into the multi-frequency modified adsorption device to flush the interior of the multi-frequency modified adsorption device, and flushing the discharged bisphenol A-containing waste liquid into a waste liquid tank for further treatment;
and K3, after the washing with clear water is completed, introducing acid liquor into the multi-frequency modified adsorption device to further wash the interior of the multi-frequency modified adsorption device, so that the interior of the multi-frequency modified adsorption device is changed from alkalinity to acidity, introducing acid liquor wastewater discharged by washing with acid liquor into the second membrane separation device, introducing the acid liquor penetrating through the second membrane separation device into the acid storage tank for recycling, and introducing concentrated solution intercepted by the second membrane separation device into the waste liquor tank for further treatment.
The invention has the beneficial effects that: by adopting the system and the method for the advanced treatment of the bisphenol A wastewater, the treated wastewater achieves a higher purification effect, the purified sodium chloride brine directly enters the chlor-alkali process section for reutilization, and the bisphenol A subjected to analysis or concentration is repeatedly reused, so that the environment is protected, the energy is saved, and the operation cost is reduced while no secondary pollution is generated.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the drawings, 1-MVR evaporation device; 2-a waste liquid tank; 3-a first booster pump; 4-a wastewater acidification device; 5-a first filter; 6-multifrequency modified adsorption equipment; 7-Ph adjusting means; 8-a second filter; 9-a first membrane separation device and 10-a permeate storage tank; 11-high TOC storage tank; 12-high salt high efficiency oxidation device; 13-a third booster pump; 14-an activated carbon adsorption unit; 15-acid storage tank; 16-a second booster pump; 17-a second membrane separation device.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are merely used to more clearly illustrate the technical solutions of the present embodiments, and therefore, the following embodiments are only used as examples, and the protection scope of the present embodiments is not limited thereby.
As shown in fig. 1, an embodiment of the present invention provides a system for advanced treatment of bisphenol a wastewater, which includes an MVR evaporation apparatus 1, a wastewater tank 2, a first booster pump 3, a wastewater acidification apparatus 4, a first filter 5, a multi-frequency modified adsorption apparatus 6, a Ph adjustment apparatus 7, a second filter 8, a first membrane separation apparatus 9, a permeate storage tank 10, a high TOC storage tank 11, a high-salt high-efficiency oxidation apparatus 12, a third booster pump 13, an activated carbon adsorption apparatus 14, and an acid liquor cleaning system.
The entry linkage waste water of MVR evaporation plant 1 is intake, and MVR evaporation plant 1's export is passed through the pipeline and is inserted waste liquid jar 2, and MVR evaporation plant 1 main objective evaporates in advance, reduces waste water treatment volume, reduces investment cost and running cost, gets rid of the organic matter to first membrane separator 9 and provides the condition.
The waste liquid tank 2, the first booster pump 3, the waste water acidification device 4, the first filter 5, the multi-frequency modified adsorption device 6, the Ph adjusting device 7, the second filter 8 and the first membrane separation device 9 are sequentially connected in series through pipelines. The permeate liquid outlet of the first membrane separation device 9 is connected with the permeate liquid storage tank 10 through a pipeline, the concentrated liquid outlet of the first membrane separation device 9 is connected with the inlet of the high TOC storage tank 11 through a pipeline, the inlet of the high-salt high-efficiency oxidation device 12 is connected with the outlet of the high TOC storage tank 11 through a pipeline, and the outlet of the high-salt high-efficiency oxidation device 12 is connected with the inlet of the second filter 8 through a pipeline.
The waste liquid tank 2 is mainly used for buffering and homogenizing incoming water so that the water inflow of a subsequent device is more stable.
The wastewater acidification device 4 is mainly used for adjusting the pH value of the wastewater to make the pH value of the wastewater be 3-5, so that the bisphenol A sodium in the bisphenol A wastewater is promoted to be converted into bisphenol A, and conditions are provided for the subsequent multi-frequency modified adsorption device 6 to adsorb the bisphenol A.
The first filter 5 is preferably a bag filter, and the bag filter mainly functions to retain impurities which are not retained by a front-stage process module and prolong the operation period of the multi-frequency modified adsorption device 6.
The multi-frequency modified adsorption device 6 is filled with modified porous adsorption resin, and the modified porous adsorption resin can adsorb bisphenol A and CH in waste liquid2Cl2Effectively removing the bisphenol A at the water outlet end of the reactor to ensure that the value of the bisphenol A at the water outlet end is less than or equal to 0.1 ppm.
The Ph adjusting device 7 mainly aims to adjust the Ph value in water to 10-11, prevent the subsequent device from being corroded under the acidic condition, reduce the investment cost of the subsequent device and simultaneously enable (CH) in wastewater3)3N and other organics are more easily retained by the first membrane separation device 9.
The second filter 8 is preferably a precision filter, and has the main function of protecting the first membrane separation device 9 and trapping large-particle impurities in the waste liquid.
The membrane separation device belongs to the prior art, the sodium chloride brine can permeate from the first membrane separation device 9, the organic matters are intercepted to form concentrated water, the interception effect of the first membrane separation device 9 on the organic matters is high under the condition of high salt, and the TOC index of the sodium chloride brine purified by the first membrane separation device 9 can meet the purity of the sodium chloride brine entering the chlor-alkali device.
The permeate liquid storage tank 10 is mainly used for storing purified sodium chloride brine, and the safe and stable operation of the system is guaranteed.
The high TOC storage tank 11 is used for storing concentrated water discharged by the first membrane separation device 9, and can play a role in buffering to ensure the safe and stable operation of the system.
The oxidant of the high-salt high-efficiency oxidation device 12 is ozone, the high-salt high-efficiency oxidation device 12 mainly utilizes the ozone to generate hydroxyl radicals on the surface of the catalyst, micro and nonbiodegradable organic matters in the concentrated water discharged from the first membrane separation device 9 are deoxidized, COD (chemical oxygen demand) of the wastewater and water purification are deeply removed, and the wastewater which is not degraded and contains the organic matters is returned to the second filter 8 for further interception.
An inlet of the third booster pump 13 is connected with an outlet of the permeate storage tank 10 through a pipeline, and an outlet of the third booster pump is connected with an inlet of the activated carbon adsorption device 14 through a pipeline. The third booster pump 13 mainly provides power for the activated carbon adsorption device 14, the activated carbon adsorption device 14 works through the carbon bed, the activated carbon particles forming the carbon bed have very many micropores and huge specific surface area, and have very strong physical adsorption capacity, the waste liquid passes through the carbon bed, and the organic pollutants (CH) in the water3)3N and other organic substances are effectively adsorbed by the activated carbon. It should be noted that, in general, the sodium chloride brine purified by the first membrane separation device 9 can meet the requirement of recycling, and the activated carbon adsorption device 14 mainly plays a role of security, so that the effluent TOC index is stably less than 3ppm, and the purity of the sodium chloride brine entering the chlor-alkali device is also improved, which is more beneficial to recycling. Therefore, the cycle of the operation of the activated carbon adsorption device 14 is greatly improved, and the operation cost is greatly reduced.
The acid liquor cleaning system comprises an acid storage tank 15, a second booster pump 16 and a second membrane separation device 17, wherein an inlet of the second booster pump 16 is connected with an outlet of the acid storage tank 15 through a pipeline, an outlet of the second booster pump 16 is connected with an acid cleaning inlet of the multi-frequency modified adsorption device 6 through a pipeline, an inlet of the second membrane separation device 17 is connected with an acid cleaning outlet of the multi-frequency modified adsorption device 6, a concentrated solution outlet of the second membrane separation device 17 is connected into the waste liquor tank 2 through a pipeline, and a permeate solution outlet of the second membrane separation device 17 is connected into the acid storage tank 15 through a pipeline.
In the process of bisphenol A analysis, firstly, introducing an alkali solution analysis liquid (sodium hydroxide) into the multi-frequency modified adsorption device 6 to analyze the bisphenol A adsorbed on the adsorbent of the multi-frequency modified adsorption device 6, and directly returning the analyzed bisphenol A sodium to a pretreatment process section to realize the recycling of the bisphenol A; after the analysis is finished, introducing clear water into the multi-frequency modified adsorption device 6 to flush the interior of the multi-frequency modified adsorption device 6, and flushing the discharged bisphenol A-containing waste liquid into a waste liquid tank 2 for further treatment; the clear water washes the completion back, let in acidizing fluid (like hydrochloric acid) in to multifrequency modified adsorption device 6, in order to further wash multifrequency modified adsorption device 6's inside, make multifrequency modified adsorption device 6's inside become acidity by basicity, the acidizing fluid washes exhaust acidizing fluid waste water and lets in second membrane separation device 17, the acidizing fluid that passes through second membrane separation device 17 gets into acid storage tank 15 and retrieves reuse, treat when multifrequency modified adsorption device 6 washs the pump again and go into multifrequency modified adsorption device 6 recycle, the concentrate that is dammed by second membrane separation device 17 gets into waste liquid tank 2, in order to treat next step.
The embodiment recovers the acid cleaning liquid after cleaning the multi-frequency modified adsorption device 6, reduces the operation cost and avoids the pollution to the environment.
The embodiment of the invention also provides a method for deeply treating bisphenol A wastewater, which comprises a water treatment step and an analysis step.
Wherein the water treatment step comprises the following steps:
step S1, introducing the wastewater into a wastewater acidification device 4, adjusting the pH value of the wastewater to 3-5, and promoting the bisphenol A sodium in the bisphenol A wastewater to be converted into bisphenol A;
step S2, introducing the wastewater discharged by the wastewater acidification device 4 into a first filter 5, and intercepting large-particle impurities in the wastewater;
step S3, the wastewater discharged by the first filter 5 is introduced into the multi-frequency modified adsorption device 6,adsorbing bisphenol A and CH in waste liquid2Cl2So that the value of bisphenol A at the outlet is less than or equal to 0.1 ppm;
step S4, introducing the wastewater discharged by the multi-frequency modified adsorption device 6 into a Ph adjusting device 7, and adjusting the Ph value in the water to 10-11;
step S5, introducing the wastewater discharged by the Ph adjusting device 7 into a second filter 8, and intercepting large-particle impurities in the wastewater;
step S6, the wastewater discharged by the second filter 8 is introduced into the first membrane separation device 9, the solution penetrating through the first membrane separation device 9 enters a chlor-alkali process section for recycling, the concentrated solution intercepted by the first membrane separation device 9 is introduced into the high-salt high-efficiency oxidation device 12, COD (chemical oxygen demand) of the wastewater and the purified water quality are deeply removed, and the wastewater which is not degraded and contains organic matters is returned to the front of the second filter 8 for further interception.
Preferably, step S1 is preceded by a wastewater evaporation step: the raw water of the wastewater is introduced into the MVR evaporation plant 1 to evaporate the wastewater in advance. The step 6 is followed by an activated carbon adsorption step: the solution passing through the first membrane separation device 9 is further filtered by the activated carbon adsorption device 14, so that the TOC index of the effluent is ensured to be stably less than 3ppm, and meanwhile, the purity of the sodium chloride brine entering the chlor-alkali device is improved, and the reuse is facilitated.
It should be noted that the concentration of the purified sodium chloride brine is about 10%, while the concentration of sodium chloride required by the chlor-alkali process section is 20-25%, and the purified sodium chloride brine needs to be concentrated before the chlor-alkali plant.
The analysis step comprises the following steps:
step K1, after the water treatment step is stopped, introducing an alkali solution desorption solution into the multi-frequency modified adsorption device 6 to desorb the bisphenol A adsorbed on the adsorbent of the multi-frequency modified adsorption device 6, and directly returning the desorbed bisphenol A sodium to the pretreatment process section;
step K2, after the analysis is completed, introducing clear water into the multi-frequency modified adsorption device 6 to flush the interior of the multi-frequency modified adsorption device 6, and enabling the bisphenol A-containing waste liquid discharged by the flushing to enter the waste liquid tank 2 for the next treatment;
and K3, after the washing with clear water is completed, introducing acid liquor into the multi-frequency modified adsorption device 6 to further wash the interior of the multi-frequency modified adsorption device 6, so that the interior of the multi-frequency modified adsorption device 6 is changed from alkalinity to acidity, introducing acid liquor wastewater discharged by washing with acid liquor into the second membrane separation device 17, introducing the acid liquor passing through the second membrane separation device 17 into the acid storage tank 15 for recycling, and introducing concentrated solution intercepted by the second membrane separation device 17 into the waste liquor tank 2 for further treatment.
Adopt above-mentioned analytic step, can carry out the analysis to the bisphenol A who adsorbs on multifrequency modified adsorption device 6's adsorbent, obtain recycle's bisphenol A sodium, handle through the waste liquid that washs multifrequency modified adsorption device 6 and produce, stopped the pollution that causes the environment, can also retrieve the acid cleaning liquid simultaneously, practiced thrift the resource, the cost is reduced.
In conclusion, the system and the method for the advanced treatment of the bisphenol A wastewater are adopted, so that the treated wastewater achieves a higher purification effect, the purified sodium chloride brine directly enters the chlor-alkali process section for reutilization, and the analyzed or concentrated bisphenol A is repeatedly reused, so that secondary pollution is avoided, the environment is protected, energy is saved, and the operation cost is reduced.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the present embodiment, and not for limiting the same; although the present embodiment has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not cause the essence of the corresponding technical solution to depart from the scope of the technical solutions of the embodiments of the present embodiment, and all of them should be covered in the claims and the specification of the present embodiment.
Claims (10)
1. A system for the advanced treatment of bisphenol A wastewater is characterized by comprising a wastewater tank, a first booster pump, a wastewater acidification device, a first filter, a multi-frequency modified adsorption device, a Ph adjusting device, a second filter, a first membrane separation device, a permeate storage tank, a high TOC storage tank and a high-salt efficient oxidation device;
the waste liquid tank, the first booster pump, the waste water acidification device, the first filter, the multi-frequency modified adsorption device, the Ph adjusting device, the second filter and the first membrane separation device are sequentially connected in series through pipelines;
the permeate liquid outlet of the first membrane separation device is connected with the permeate liquid storage tank through a pipeline, the concentrated liquid outlet of the first membrane separation device is connected with the inlet of the high TOC storage tank through a pipeline, the inlet of the high-salt high-efficiency oxidation device is connected with the outlet of the high TOC storage tank through a pipeline, and the outlet of the high-salt high-efficiency oxidation device is connected with the inlet of the second filter through a pipeline.
2. The system for advanced treatment of bisphenol a wastewater as claimed in claim 1, further comprising an acid cleaning system, wherein the acid cleaning system comprises an acid storage tank, a second booster pump and a second membrane separation device, an inlet of the second booster pump is connected with an outlet of the acid storage tank through a pipeline, an outlet of the second booster pump is connected with an acid cleaning inlet of the multi-frequency modified adsorption device through a pipeline, an inlet of the second membrane separation device is connected with an acid cleaning outlet of the multi-frequency modified adsorption device, a concentrated solution outlet of the second membrane separation device is connected into the waste solution tank through a pipeline, and a permeate solution outlet of the second membrane separation device is connected into the acid storage tank through a pipeline.
3. The bisphenol A wastewater advanced treatment system according to claim 1, further comprising an MVR evaporation device, wherein an inlet of the MVR evaporation device is connected with wastewater inlet water, and an outlet of the MVR evaporation device is connected into the wastewater tank through a pipeline.
4. The system for advanced treatment of bisphenol A wastewater as claimed in claim 1, further comprising a third booster pump and an activated carbon adsorption device, wherein an inlet of the third booster pump is connected with an outlet of the permeate storage tank through a pipeline, and an outlet of the third booster pump is connected with an inlet of the activated carbon adsorption device through a pipeline.
5. The system for advanced bisphenol a wastewater treatment of claim 1, wherein said first filter is a bag filter.
6. The system for advanced bisphenol a wastewater treatment of claim 1, wherein said second filter is a precision filter.
7. The system for advanced treatment of bisphenol A wastewater as claimed in claim 1, wherein the adsorbent filled in the multi-frequency modified adsorption device is modified porous adsorption resin.
8. The method for deeply treating the bisphenol A wastewater is characterized by comprising a water treatment step, wherein the water treatment step comprises the following steps:
step S1, introducing the wastewater into a wastewater acidification device, adjusting the pH value of the wastewater to 3-5, and promoting the bisphenol A sodium in the bisphenol A wastewater to be converted into bisphenol A;
step S2, introducing the wastewater discharged by the wastewater acidification device into a first filter, and intercepting large-particle impurities in the wastewater;
step S3, introducing the wastewater discharged by the first filter into a multi-frequency modified adsorption device to adsorb bisphenol A and CH in the wastewater2Cl2So that the value of bisphenol A at the outlet is less than or equal to 0.1 ppm;
step S4, introducing the wastewater discharged by the multi-frequency modified adsorption device into a Ph adjusting device, and adjusting the Ph value in the water to 10-11;
step S5, introducing the wastewater discharged by the Ph adjusting device into a second filter, and intercepting large-particle impurities in the wastewater;
and step S6, introducing the wastewater discharged by the second filter into the first membrane separation device, introducing the solution penetrating through the first membrane separation device into a chlor-alkali process section for recycling, introducing the concentrated solution intercepted by the first membrane separation device into a high-salt high-efficiency oxidation device, deeply removing COD (chemical oxygen demand) and purifying water quality of the wastewater, and returning the wastewater containing organic matters which are not degraded to the front of the second filter for further interception.
9. The method for advanced treatment of bisphenol A wastewater as claimed in claim 8, further comprising a wastewater evaporation step before step S1: the raw water of the wastewater is introduced into the MVR evaporation device to evaporate the wastewater in advance.
10. The method for the advanced treatment of bisphenol A wastewater as claimed in claim 8 or 9, further comprising a resolving step, wherein the resolving step comprises the steps of:
k1, after the water treatment step is stopped, introducing an alkali solution desorption liquid into the multi-frequency modified adsorption device to desorb the bisphenol A adsorbed on the adsorbent of the multi-frequency modified adsorption device, and directly returning the desorbed bisphenol A sodium to the pretreatment process section;
step K2, after the analysis is completed, introducing clear water into the multi-frequency modified adsorption device to flush the interior of the multi-frequency modified adsorption device, and flushing the discharged bisphenol A-containing waste liquid into a waste liquid tank for further treatment;
and K3, after the washing with clear water is completed, introducing acid liquor into the multi-frequency modified adsorption device to further wash the interior of the multi-frequency modified adsorption device, so that the interior of the multi-frequency modified adsorption device is changed from alkalinity to acidity, introducing acid liquor wastewater discharged by washing with acid liquor into the second membrane separation device, introducing the acid liquor penetrating through the second membrane separation device into the acid storage tank for recycling, and introducing concentrated solution intercepted by the second membrane separation device into the waste liquor tank for further treatment.
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