CN115849605A - Efficient heterojunction battery production wastewater treatment method and system - Google Patents
Efficient heterojunction battery production wastewater treatment method and system Download PDFInfo
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Abstract
The invention relates to the technical field of sewage treatment, and discloses a method and a system for treating production wastewater of a high-efficiency heterojunction battery. The method and the system for treating the production wastewater of the high-efficiency heterojunction battery enable the treated water to meet the high-standard discharge requirement by carrying out classified collection and quality-based treatment on the wastewater. The invention realizes the wastewater treatment with lower cost and high efficiency. Meanwhile, the invention can realize zero discharge of the ammonia nitrogen-containing wastewater.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a method and a system for treating production wastewater of a high-efficiency heterojunction battery.
Background
The wastewater generated in the production process of the high-efficiency heterojunction battery mainly comprises concentrated HF (hydrofluoric acid) wastewater, concentrated HCl (hydrochloric acid) wastewater, concentrated alkali wastewater, F (fluorine) -containing washing wastewater, alkali-containing wastewater and Cu-containing wastewater 2+ (copper ion) wastewater, ammonia-containing wastewater, concentrated alkaline wastewater containing a texturing additive, flushing wastewater containing the texturing additive and other 9 types of wastewater. Wherein, 6 types of wastewater such as concentrated HF (hydrofluoric acid) wastewater, concentrated HCl (hydrochloric acid) wastewater, concentrated alkali wastewater, F (fluorine) -containing rinsing wastewater, alkali-containing wastewater, rinsing wastewater containing a wool making additive and the like contain fluoride ions; the ammonia-containing wastewater and the concentrated alkali wastewater containing the wool making additive both contain ammonia nitrogen.
For example, in the Taihu river basin, according to the requirements of the Taihu river basin management regulations, the emission requirement of F- (fluorine ions) of fluorine-containing wastewater is less than or equal to 2mg/L, the emission requirement of nitrogen-containing wastewater is zero, and the emission requirement of copper-containing wastewater is Cu 2+ The content of copper ions is less than or equal to 0.3mg/L. The concentration of F- (fluorinion) in the evenly mixed fluorine-containing wastewater is between 2000 and 3000mg/L, and the wastewater amount is very large and needs to be treated below 2 mg/L.
Compared with other types of solar cells, the ammonia-containing wastewater of the high-efficiency heterojunction cell is very little, but zero emission is required under relevant emission standards, such as Taihu lake basin administration regulations. The ammonia nitrogen concentration of the inflow water of the ammonia-containing wastewater is between 200 and 300mg/L, and the inflow water Cu of the copper-containing wastewater 2+ The concentration of (copper ions) is between 400 and 600mg/L, wherein a certain content of complex copper is contained, and the outlet water Cu is treated according to the requirement 2+ The concentration of (copper ions) is less than 0.3mg/L. The existing sewage treatment system is difficult to meet the requirements.
Disclosure of Invention
The invention aims to provide a high-efficiency heterojunction battery production wastewater treatment system with low cost and high efficiency.
In order to solve the above problems, the present invention provides a high efficiency heterojunction battery production wastewater treatment system, comprising: a fluorine-containing wastewater treatment system, the fluorine-containing wastewater treatment system comprising:
a plurality of fluorine-containing wastewater collecting devices, an acidic wastewater regulating tank, an alkaline wastewater regulating tank, a first-stage reaction tank, a first-stage sedimentation tank, a first-stage reaction tank, a second-stage sedimentation tank, an ion exchange deep fluorine removal device and a fluorine-containing sludge concentration tank;
the plurality of fluoride waste water collecting devices are used for collecting different types of fluoride waste water, the acid waste water collected by the fluoride waste water collecting devices enters the first-stage reaction tank through the acid waste water regulating tank, and the alkaline waste water collected by the fluoride waste water collecting devices enters the first-stage reaction tank through the alkaline waste water regulating tank;
the first stage reaction tank I, the first stage sedimentation tank I, the first stage reaction tank I, the second stage sedimentation tank I and the ion exchange deep defluorination device are sequentially connected, and the first stage reaction tank I is used for adding lime milk and CaCl 2 Calcium fluoride is formed with fluoride ions in the fluorine-containing wastewater and is precipitated in the first-stage sedimentation tank, the first-stage reaction tank is also used for adding PAC and PAM, coagulation reaction is carried out in the fluorine-containing wastewater, mud and water are separated in the first-stage sedimentation tank to realize primary fluorine removal, supernatant of the wastewater precipitated in the first-stage sedimentation tank enters the first-stage reaction tank, and the first-stage reaction tank and the first-stage sedimentation tank are matched to continuously treat the wastewater to realize secondary fluorine removal;
the ion exchange deep fluorine removal device is used for deeply removing fluorine from wastewater subjected to secondary fluorine removal, so that the water subjected to deep fluorine removal reaches the discharge standard.
In one embodiment of the present invention, the different types of fluorine-containing wastewater include hydrofluoric acid wastewater, concentrated hydrochloric acid wastewater, concentrated alkali wastewater, fluorine-containing rinsing wastewater, alkali-containing wastewater, and wool making additive rinsing wastewater, wherein the hydrofluoric acid wastewater, the concentrated hydrochloric acid wastewater, and the fluorine-containing rinsing wastewater are acidic wastewater, and the concentrated alkali wastewater, the alkali-containing wastewater, and the wool making additive rinsing wastewater are alkaline wastewater.
In one embodiment of the invention, the acidic wastewater adjusting tank and the alkaline wastewater adjusting tank are both provided with an aeration stirring device and a pH meter, the pH meter is used for detecting the pH value of the fluorine-containing wastewater, and the flow of the effluent of the acidic wastewater adjusting tank and the alkaline wastewater adjusting tank is adjusted according to the pH value.
In one embodiment of the invention, the system further comprises a fluorine-containing sludge concentration tank, sludge precipitated in the first-stage sedimentation tank and the second-stage sedimentation tank enters the fluorine-containing sludge concentration tank, and the fluorine-containing sludge concentration tank concentrates the fluorine-containing sludge and then enters the fluorine-containing sludge filter press.
In one embodiment of the present invention, further comprising an ammonia nitrogen-containing wastewater treatment system, the ammonia nitrogen-containing wastewater treatment system comprising:
the device comprises a nitrogen-containing wastewater collection device, a texturing additive-containing concentrated alkali wastewater collection device, a defluorination reaction tank, a defluorination sedimentation tank, a nitrogen-containing sludge concentration tank, an ammonia-nitrogen-containing wastewater regulation tank, a multi-media filter, an activated carbon filter, a laminated filter, an ultrafiltration device, a reverse osmosis device, a concentrated water reverse osmosis device, an RO water production tank, an ultrafiltration water production tank, a reverse osmosis concentrated water tank, an ROR concentrated water tank and an MVR evaporator;
the wastewater containing ammonia and nitrogen in the nitrogen-containing wastewater collection device and the concentrated alkali wastewater containing the wool making additive enter the defluorination reaction tank for defluorination, and the defluorination reaction tank is used for adding lime milk and CaCl 2 Calcium fluoride is formed with fluoride ions in the fluorine-containing wastewater and is precipitated in the defluorination sedimentation tank, the defluorination reaction tank is also used for adding PAC and PAM, coagulation reaction is carried out in the fluorine-containing wastewater, mud and water in the defluorination sedimentation tank are separated to realize defluorination, the wastewater after defluorination enters the ammonia nitrogen-containing wastewater adjusting tank, the sludge in the defluorination sedimentation tank enters the nitrogen-containing sludge concentration tank, and the nitrogen-containing sludge concentration tank concentrates the fluorine-containing sludge and then enters the nitrogen-containing sludge filter press;
the wastewater in the ammonia nitrogen-containing wastewater regulating tank passes through the multi-media filter, the activated carbon filter, the lamination filter and the ultrafiltration device in sequence by the lift pump, so that particle impurities below 0.1 micron in the wastewater are removed, and part of organic matters are removed;
the reverse osmosis device and the concentrated water reverse osmosis device are used for removing ions and COD in the wastewater, and the produced water of the reverse osmosis and the concentrated water reverse osmosis enters the RO water production tank and is conveyed to a cooling tower for water supplement or an absorption tower for water supplement by a pump;
the ultrafiltration product water gets into through reverse osmosis booster pump and high-pressure pump reverse osmosis unit carries out the concentration, and the dense water of reverse osmosis passes through dense water reverse osmosis unit carries out the concentration, dense water of dense water reverse osmosis unit keeps in the back pump in the dense water tank of ROR and goes into the MVR evaporimeter carries out the evaporative concentration, and the comdenstion water is gone into cooling tower moisturizing or absorption tower moisturizing after collecting.
In one embodiment of the present invention, there is also included a copper-containing wastewater treatment system, comprising:
a copper-containing wastewater collecting tank, a first-stage reaction tank II, a first-stage sedimentation tank II, a second-stage reaction tank II, a second-stage sedimentation tank II, a third-stage reaction tank and a third-stage sedimentation tank which are connected in sequence; the copper-containing wastewater collected by the copper-containing wastewater collecting tank flows through the second primary reaction tank, the second primary sedimentation tank, the second secondary reaction tank, the second secondary sedimentation tank, the third reaction tank and the third sedimentation tank in sequence;
the first-stage reaction tank is used for adding a recapture agent and Ca (OH) 2 And ferrous sulfate, PAM, play the effect of reaction, catching, flocculation with the copper ion in the copper-containing waste water, form the flocculating constituent and subside in the second of one-level sedimentation tank, second of second grade reaction tank, second of second grade sedimentation tank, tertiary reaction tank, tertiary sedimentation tank continue to handle the waste water, realize tertiary materialization.
In an embodiment of the invention, the copper-containing wastewater treatment system further includes a copper-containing sludge concentration tank, the second primary sedimentation tank, the second secondary sedimentation tank and the third tertiary sedimentation tank are all connected with the copper-containing sludge concentration tank, sludge precipitated in the second primary sedimentation tank, the second secondary sedimentation tank and the third tertiary sedimentation tank enters the copper-containing sludge concentration tank, and the copper-containing sludge concentration tank concentrates the copper-containing sludge and then enters a copper-containing sludge filter press.
The invention also provides a high-efficiency heterojunction battery production wastewater treatment method, which is applied to the high-efficiency heterojunction battery production wastewater treatment system and comprises a fluorine-containing wastewater treatment method, wherein the fluorine-containing wastewater treatment method is applied to the fluorine-containing wastewater treatment system and comprises the following steps:
s11, collecting different types of fluorine-containing wastewater by using a plurality of fluorine-containing wastewater collecting devices, wherein the acidic wastewater collected by the fluorine-containing wastewater collecting devices enters the first-stage reaction tank through the acidic wastewater adjusting tank, and the alkaline wastewater collected by the fluorine-containing wastewater collecting devices enters the first-stage reaction tank through the alkaline wastewater adjusting tank;
s12, adding lime milk and CaCl into the first-stage reaction tank I 2 Calcium fluoride is formed with fluoride ions in the fluorine-containing wastewater and is precipitated in the first-stage sedimentation tank, PAC and PAM are added into the first-stage reaction tank, coagulation reaction is carried out in the fluorine-containing wastewater, mud and water are separated in the first-stage sedimentation tank to realize primary fluorine removal, the wastewater precipitated in the first-stage sedimentation tank enters the first-stage reaction tank, and the first-stage reaction tank and the first-stage sedimentation tank are matched to continuously treat the wastewater to realize secondary fluorine removal;
s13, deeply removing fluorine from the wastewater subjected to secondary fluorine removal by using the ion exchange deep fluorine removal device to enable the water subjected to deep fluorine removal to reach the discharge standard;
s14, the sludge precipitated in the first-stage sedimentation tank and the first-stage sedimentation tank enters a fluorine-containing sludge concentration tank, and the fluorine-containing sludge is concentrated by the fluorine-containing sludge concentration tank and then enters a fluorine-containing sludge filter press.
The invention also provides a high-efficiency heterojunction battery production wastewater treatment method, which is applied to the high-efficiency heterojunction battery production wastewater treatment system and comprises an ammonia nitrogen-containing wastewater treatment method, wherein the ammonia nitrogen-containing wastewater treatment method is applied to the ammonia nitrogen-containing wastewater treatment system and comprises the following steps:
s21, collecting ammonia nitrogen-containing wastewater by using the nitrogen-containing wastewater collection device and the wool making additive-containing concentrated alkali wastewater collection device, and adding lime milk and CaCl into the defluorination reaction tank 2 Calcium fluoride is formed with fluoride ions in the fluorine-containing wastewater and is precipitated in the defluorination sedimentation tank, PAC and PAM are continuously added into the defluorination reaction tank, coagulation reaction is carried out in the fluorine-containing wastewater, mud and water in the defluorination sedimentation tank are separated to realize defluorination, and the wastewater after defluorination enters the ammonia nitrogen-containing wastewater adjusting tank;
s22, enabling the wastewater in the ammonia nitrogen-containing wastewater regulating tank to sequentially pass through the multi-media filter, the activated carbon filter, the lamination filter and the ultrafiltration device through a lift pump, removing particle impurities below 0.1 micrometer in the wastewater, and removing partial organic matters;
s23, feeding ultrafiltration produced water into the reverse osmosis device for concentration through a reverse osmosis booster pump and a high-pressure pump, feeding reverse osmosis concentrated water into the concentrated water reverse osmosis device for concentration, temporarily storing the concentrated water of the concentrated water reverse osmosis device in an ROR concentrated water tank, pumping the concentrated water into the MVR evaporator for evaporation and concentration, and pumping condensed water into a cooling tower for water supplement or an absorption tower for water supplement after collection;
s24, independently feeding the sludge generated by the ammonia nitrogen-containing wastewater treatment system into a separate sludge dewatering system for reduction.
The invention also provides a high-efficiency heterojunction battery production wastewater treatment method, which is applied to the high-efficiency heterojunction battery production wastewater treatment system and comprises a copper-containing wastewater treatment method, wherein the copper-containing wastewater treatment method is applied to the copper-containing wastewater treatment system and comprises the following steps:
s31, collecting the copper-containing wastewater by using the copper-containing wastewater collecting tank, and adding a heavy catching agent and Ca (OH) into the first-stage reaction tank II 2 Ferrous sulfate and PAM play a role in reaction, capture and flocculation with copper ions in the copper-containing wastewater to form flocs which are settled in the first-stage sedimentation tank II;
s32, enabling the effluent of the primary sedimentation tank II to enter a secondary reaction tank II, and adding a recapture agent and Ca (OH) into the secondary reaction tank II 2 And ferrous sulfate and PAM, and separating sludge and water in the secondary effluent of the secondary reaction tank in the secondary sedimentation tank;
s33, enabling the effluent of the second-stage sedimentation tank to enter the third-stage reaction tank, and adding a heavy catching agent and Ca (OH) into the third-stage reaction tank 2 The effluent of the third-stage reaction tank is clarified in the third-stage sedimentation tank and is fed into a discharge tank;
and S34, sludge obtained by the first-stage sedimentation tank II, the second-stage sedimentation tank II and the third-stage sedimentation tank enters the copper-containing sludge concentration tank, and the copper-containing sludge concentration tank concentrates the copper-containing sludge and then enters the copper-containing sludge filter press.
The invention has the beneficial effects that:
the method and the system for treating the production wastewater of the high-efficiency heterojunction battery enable the treated water to meet the high-standard discharge requirement by carrying out classified collection and quality-based treatment on the wastewater. The invention realizes the wastewater treatment with lower cost and high efficiency. Meanwhile, the invention can realize zero discharge of the ammonia nitrogen-containing wastewater.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are specifically described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a high-efficiency heterojunction battery production wastewater treatment system in an embodiment of the invention.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Example one
As shown in FIG. 1, the system for treating wastewater from high efficiency heterojunction battery production in the embodiment of the invention comprises: a fluorine-containing wastewater treatment system, the fluorine-containing wastewater treatment system comprising:
a plurality of fluorine-containing wastewater collecting devices, an acidic wastewater regulating tank, an alkaline wastewater regulating tank, a first-stage reaction tank, a first-stage sedimentation tank, a first-stage reaction tank, a second-stage sedimentation tank, an ion exchange deep fluorine removal device and a fluorine-containing sludge concentration tank;
the plurality of fluoride waste water collecting devices are used for collecting different types of fluoride waste water, the acid waste water collected by the fluoride waste water collecting devices enters the first primary reaction tank through the acid waste water regulating tank, and the alkaline waste water collected by the fluoride waste water collecting devices enters the first primary reaction tank through the alkaline waste water regulating tank;
the first-stage reaction tank I, the first-stage sedimentation tank I, the first-stage reaction tank I, the second-stage sedimentation tank I and the ion exchange deep defluorination device are sequentially connected, and the first-stage reaction tank I is used for adding lime milk and CaCl 2 Calcium fluoride is formed with fluoride ions in the fluorine-containing wastewater and is precipitated in the first-stage sedimentation tank, the first-stage reaction tank is also used for adding PAC and PAM, coagulation reaction is carried out in the fluorine-containing wastewater, mud and water are separated in the first-stage sedimentation tank to realize primary fluorine removal, the supernatant of the wastewater precipitated in the first-stage sedimentation tank enters the first second-stage reaction tank, and the first second-stage reaction tank and the first second-stage sedimentation tank are matched to continuously treat the wastewater to realize secondary fluorine removal;
the ion exchange deep fluorine removal device is used for deeply removing fluorine from the wastewater after secondary fluorine removal, so that the water after deep fluorine removal reaches the discharge standard.
The different types of fluorine-containing wastewater comprise hydrofluoric acid wastewater, concentrated hydrochloric acid wastewater, concentrated alkali wastewater, fluorine-containing washing wastewater, alkali-containing wastewater and wool-making additive-containing washing wastewater, wherein the hydrofluoric acid wastewater, the concentrated hydrochloric acid wastewater and the fluorine-containing washing wastewater are acidic wastewater, and the concentrated alkali wastewater, the alkali-containing wastewater and the wool-making additive-containing washing wastewater are alkaline wastewater. Wherein, the different types of fluorine-containing wastewater are comprehensively collected in respective collecting tanks (tanks) for water quality and water quantity, and are uniform in quality, wherein the strong acid wastewater is stored by a PE storage tank.
And further, the acid wastewater adjusting tank and the alkaline wastewater adjusting tank are both provided with an aeration stirring device and a pH instrument, the pH instrument is used for detecting the pH value of the fluorine-containing wastewater, and the flow of the effluent of the acid wastewater adjusting tank and the flow of the effluent of the alkaline wastewater adjusting tank are adjusted according to the pH value.
And further, the device also comprises a fluorine-containing sludge concentration tank, sludge precipitated in the first-stage sedimentation tank and the second-stage sedimentation tank enters the fluorine-containing sludge concentration tank, and the fluorine-containing sludge concentration tank concentrates the fluorine-containing sludge and then enters the fluorine-containing sludge filter press.
Example two
The embodiment discloses a treatment method of production wastewater of a high-efficiency heterojunction battery, which is applied to a treatment system of production wastewater of a high-efficiency heterojunction battery in the first embodiment, and comprises a treatment method of fluorine-containing wastewater, wherein the treatment method of fluorine-containing wastewater is applied to the treatment system of fluorine-containing wastewater, and comprises the following steps:
s11, collecting different types of fluorine-containing wastewater by using a plurality of fluorine-containing wastewater collecting devices, wherein the acidic wastewater collected by the fluorine-containing wastewater collecting devices enters the first-stage reaction tank through the acidic wastewater adjusting tank, and the alkaline wastewater collected by the fluorine-containing wastewater collecting devices enters the first-stage reaction tank through the alkaline wastewater adjusting tank;
s12, adding lime milk and CaCl into the first-stage reaction tank 2 Calcium fluoride is formed with fluoride ions in the fluorine-containing wastewater and is precipitated in the first-stage sedimentation tank, PAC and PAM are added into the first-stage reaction tank, coagulation reaction is carried out in the fluorine-containing wastewater, mud and water are separated in the first-stage sedimentation tank to realize primary fluorine removal, the wastewater precipitated in the first-stage sedimentation tank enters the first-stage reaction tank, and the first-stage reaction tank and the first-stage sedimentation tank are matched to continuously treat the wastewater to realize secondary fluorine removal;
wherein, step S12 specifically includes:
the first step is as follows: calcium salts are formed. Because lime is cheap, widely available and easily soluble in water, in the process, lime water reacts with fluorine-containing wastewater to form CaF 2 Precipitation, the reaction principle is as follows:
Ca(OH) 2 +2H + +2F＝＝CaF 2 ↓+2H 2 O
in order to further reduce the fluoride content, ca (OH) is added 2 Adding CaCl while forming calcium fluoride salt precipitate 2 According to the theory of homoionic effect, when another electrolyte containing homoions is added into a saturated solution of a difficultly soluble electrolyte, the original solubility of the electrolyte is reduced, so that more CaF2 precipitates and precipitates.
The second step is that: aluminum salt is adsorbed and precipitated. CaF produced by calcium salt neutralization 2 Is a fine crystal, and has poor precipitation effect. The coagulant and coagulant aid is an aluminum salt, and after being added into water,Al 3+ and F － And aluminium salt hydrolysis of the intermediate product and the resulting Al (OH) 3 Various alumen ustum flowers are formed in the solution, which have the functions of ligand exchange, physical adsorption, rolling and sweeping and the like on fluorine ions, and simultaneously can promote the formation and growth of calcium fluoride salt precipitation particles, and finally the generated CaF 2 Forming a precipitate in water, and separating the precipitate from the treated clear water.
Controlling pH value in the first stage reaction to 6-7, adding lime milk and CaCl 2 The method comprises the following steps of enabling a medicament and fluoride ions in wastewater to form calcium fluoride precipitate, continuing adding PAC and PAM into the two subsequent reaction tanks, wherein the PAC and the polymeric coagulant aid PAM have the functions of enabling colloids, particles, calcium fluoride precipitates and the like in the wastewater to carry out coagulation reaction through purification mechanisms such as electric neutralization, adsorption bridging, net capturing, coprecipitation and the like, enabling pollutants to be used as sludge to be precipitated, carrying out mud-water separation in the subsequent precipitation tank, enabling the pollutants, particularly the fluoride ions to be effectively removed, enabling supernatant to enter a second-stage reaction for precipitation, and reducing the concentration of the fluoride ions from 2000-3000 mg/L to 20-40 mg/L. And after a small amount of lime milk, caCl2, PAC and PAM are added into the first-stage reaction precipitated water for reaction, the first-stage reaction precipitated water enters a sedimentation tank for mud-water separation again and is clarified to obtain the water, and the concentration of fluorine ions is reduced to below 8mg/L from 20-40 mg/L.
S13, deeply removing fluorine from the wastewater subjected to secondary fluorine removal by using the ion exchange deep fluorine removal device to enable the water subjected to deep fluorine removal to reach a discharge standard; specifically, the ion exchange resin adsorption device adopts Tulsimer CH-87 defluorinating resin of Dusheng, and Tulsimer CH-87 is a special gel type selective ion exchange resin for removing fluorinion in aqueous solution. It is a resin of crosslinked polystyrene copolymer architecture with fluoride-selective functional groups. The capability of removing fluoride ions can reach a level below 1 ppm. It has an extremely high working efficiency in the neutral to alkaline pH range and is easily regenerated. The regenerated chemical can adopt 5 percent of aluminum chloride or 10 to 15 percent of aluminum sulfate, and the regenerated waste liquid can be returned to the front-end defluorination process for treatment. And (4) discharging the water subjected to deep fluorine removal to a discharge pool to reach the standard.
And S14, the sludge precipitated in the first-stage sedimentation tank and the second-stage sedimentation tank enters a fluorine-containing sludge concentration tank, and the fluorine-containing sludge is concentrated by the fluorine-containing sludge concentration tank and then enters a fluorine-containing sludge filter press.
EXAMPLE III
The embodiment discloses a high-efficient heterojunction battery waste water processing system, it still includes the ammonia nitrogen wastewater processing system on the basis of embodiment one, the ammonia nitrogen wastewater processing system includes:
the device comprises a nitrogen-containing wastewater collection device, a texturing additive-containing concentrated alkali wastewater collection device, a defluorination reaction tank, a defluorination sedimentation tank, a nitrogen-containing sludge concentration tank, an ammonia-nitrogen-containing wastewater regulation tank, a multi-media filter, an activated carbon filter, a laminated filter, an ultrafiltration device, a reverse osmosis device, a concentrated water reverse osmosis device, an RO water production tank, an ultrafiltration water production tank, a reverse osmosis concentrated water tank, an ROR concentrated water tank and an MVR evaporator;
the method comprises the following steps that ammonia nitrogen-containing wastewater in a nitrogen-containing wastewater collection device and a wool making additive concentrated alkali wastewater collection device enters a defluorination reaction tank for defluorination, the defluorination reaction tank is used for adding lime milk and CaCl2 to form calcium fluoride with fluorine ions in fluorine-containing wastewater and precipitating in a defluorination sedimentation tank, the defluorination reaction tank is also used for adding PAC and PAM to perform coagulation reaction in the fluorine-containing wastewater and enable mud and water in the defluorination sedimentation tank to be separated to realize defluorination, the wastewater after defluorination enters an ammonia nitrogen-containing wastewater adjusting tank, sludge in the defluorination sedimentation tank enters a nitrogen-containing sludge concentration tank, and the nitrogen-containing sludge concentration tank concentrates the fluorine-containing sludge and then enters a nitrogen-containing sludge filter press;
the wastewater in the ammonia nitrogen-containing wastewater regulating tank passes through the multi-media filter, the activated carbon filter, the lamination filter and the ultrafiltration device in sequence by the lift pump, so that particle impurities below 0.1 micron in the wastewater are removed, and part of organic matters are removed;
the reverse osmosis device and the concentrated water reverse osmosis device are used for removing ions and COD (wherein the ions comprise nitrate radicals and the like) in the wastewater, and water produced by reverse osmosis and concentrated water reverse osmosis enters the RO water production tank and is conveyed to a cooling tower for water supplement or an absorption tower for water supplement by a pump;
the ultrafiltration product water gets into through reverse osmosis booster pump and high-pressure pump reverse osmosis unit carries out the concentration, and the dense water of reverse osmosis passes through dense water reverse osmosis unit carries out the concentration, dense water of dense water reverse osmosis unit keeps in the back pump in the dense water tank of ROR and goes into the MVR evaporimeter carries out the evaporative concentration, and the comdenstion water is gone into cooling tower moisturizing or absorption tower moisturizing after collecting.
Example four
The embodiment discloses a method for treating wastewater generated in the production of a high-efficiency heterojunction battery, which is applied to a system for treating wastewater generated in the production of a high-efficiency heterojunction battery in the third embodiment, and comprises a method for treating wastewater containing ammonia nitrogen, wherein the method for treating wastewater containing ammonia nitrogen is applied to the system for treating wastewater containing ammonia nitrogen, and comprises the following steps:
s21, collecting ammonia nitrogen-containing wastewater by using the nitrogen-containing wastewater collection device and the wool making additive-containing concentrated alkali wastewater collection device, and adding lime milk and CaCl into the defluorination reaction tank 2 Calcium fluoride is formed with fluoride ions in the fluorine-containing wastewater and is precipitated in the defluorination sedimentation tank, PAC and PAM are continuously added into the defluorination reaction tank, coagulation reaction is carried out in the fluorine-containing wastewater, mud and water in the defluorination sedimentation tank are separated to realize defluorination, and the wastewater after defluorination enters the ammonia nitrogen-containing wastewater adjusting tank;
s22, enabling the wastewater in the ammonia nitrogen-containing wastewater regulating tank to sequentially pass through the multi-media filter, the activated carbon filter, the lamination filter and the ultrafiltration device through a lift pump, removing particle impurities below 0.1 micrometer in the wastewater, and removing partial organic matters;
s23, feeding ultrafiltration produced water into the reverse osmosis device for concentration through a reverse osmosis booster pump and a high-pressure pump, feeding reverse osmosis concentrated water into the concentrated water reverse osmosis device for concentration, temporarily storing the concentrated water of the concentrated water reverse osmosis device in an ROR concentrated water tank, pumping the concentrated water into the MVR evaporator for evaporation and concentration, and pumping condensed water into a cooling tower for water supplement or an absorption tower for water supplement after collection;
s24, independently feeding the sludge generated by the ammonia nitrogen-containing wastewater treatment system into a separate sludge dewatering system for reduction. And returning the supernatant of the sludge tank and the filtrate of the filter press to the front end of the ammonia nitrogen-containing wastewater treatment system for retreatment.
EXAMPLE five
The embodiment discloses a high-efficient heterojunction battery waste water treatment system, it still includes copper-containing waste water treatment system on the basis of embodiment one, copper-containing waste water treatment system includes:
the copper-containing wastewater collection tank, the first-stage reaction tank II, the first-stage sedimentation tank II, the second-stage reaction tank II, the second-stage sedimentation tank II, the third-stage reaction tank and the third-stage sedimentation tank are connected in sequence; the copper-containing wastewater collected by the copper-containing wastewater collecting tank flows through the first-stage reaction tank II, the first-stage sedimentation tank II, the second-stage reaction tank II, the second-stage sedimentation tank II, the third-stage reaction tank and the third-stage sedimentation tank in sequence;
the first-stage reaction tank is used for adding a heavy-duty agent and Ca (OH) 2 And ferrous sulfate, PAM, play the effect of reaction, catching, flocculation with the copper ion in the copper-containing waste water, form the flocculating constituent and subside in the second of one-level sedimentation tank, second of second grade reaction tank, second of second grade sedimentation tank, tertiary reaction tank, tertiary sedimentation tank continue to handle the waste water, realize tertiary materialization.
Furthermore, the copper-containing wastewater treatment system also comprises a copper-containing sludge concentration tank, wherein the second primary sedimentation tank, the second secondary sedimentation tank and the third secondary sedimentation tank are connected with the copper-containing sludge concentration tank, sludge precipitated in the second primary sedimentation tank, the second secondary sedimentation tank and the third secondary sedimentation tank enters the copper-containing sludge concentration tank, and the copper-containing sludge concentration tank concentrates the copper-containing sludge and then enters the copper-containing sludge filter press.
EXAMPLE six
The embodiment discloses a method for treating wastewater from high-efficiency heterojunction battery production, which is applied to the system for treating wastewater from high-efficiency heterojunction battery production in the fifth embodiment, and comprises a method for treating copper-containing wastewater, wherein the method for treating copper-containing wastewater is applied to the system for treating copper-containing wastewater, and comprises the following steps:
s31, collecting the copper-containing wastewater by using the copper-containing wastewater collecting tank, and adding a heavy catching agent and Ca (OH) into the first-stage reaction tank II 2 And ferrous sulfate, PAM, react with copper ions in the copper-containing wastewater, capture and flocculateActing, forming floc to settle in the first-stage sedimentation tank II;
s32, enabling the effluent of the primary sedimentation tank II to enter a secondary reaction tank II, and adding a recapture agent and Ca (OH) into the secondary reaction tank II 2 And ferrous sulfate and PAM, wherein the effluent of the second-stage reaction tank is subjected to sludge-water separation in the second-stage sedimentation tank; further removing the copper ions.
S33, feeding the second effluent of the second-stage sedimentation tank into the third-stage reaction tank, and adding a heavy-duty agent and Ca (OH) into the third-stage reaction tank 2 The effluent of the third-stage reaction tank is clarified in the third-stage sedimentation tank and is fed into a discharge tank; so that the copper ions are completely removed.
And S34, enabling sludge obtained by the first-stage sedimentation tank II, the second-stage sedimentation tank II and the third-stage sedimentation tank to enter the copper-containing sludge concentration tank, and enabling the copper-containing sludge to enter the copper-containing sludge filter press after the copper-containing sludge is concentrated by the copper-containing sludge concentration tank. And returning the supernatant of the sludge pool and the filtrate of the filter press to the front end of the copper-containing wastewater treatment system for retreatment.
The method and the system for treating the production wastewater of the high-efficiency heterojunction battery enable the treated water to meet the high-standard discharge requirement by carrying out classified collection and quality-based treatment on the wastewater. The invention realizes the wastewater treatment with lower cost and high efficiency. Meanwhile, the invention can realize zero discharge of the ammonia nitrogen-containing wastewater.
The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitutions or changes made by the person skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. A high-efficient heterojunction battery waste water processing system which characterized in that includes: a fluoride containing wastewater treatment system, the fluoride containing wastewater treatment system comprising:
a plurality of fluorine-containing wastewater collecting devices, an acidic wastewater regulating tank, an alkaline wastewater regulating tank, a first-stage reaction tank, a first-stage sedimentation tank, a first-stage reaction tank, a second-stage sedimentation tank, an ion exchange deep fluorine removal device and a fluorine-containing sludge concentration tank;
the plurality of fluoride waste water collecting devices are used for collecting different types of fluoride waste water, the acid waste water collected by the fluoride waste water collecting devices enters the first-stage reaction tank through the acid waste water regulating tank, and the alkaline waste water collected by the fluoride waste water collecting devices enters the first-stage reaction tank through the alkaline waste water regulating tank;
the first stage reaction tank I, the first stage sedimentation tank I, the first stage reaction tank I, the second stage sedimentation tank I and the ion exchange deep defluorination device are sequentially connected, and the first stage reaction tank I is used for adding lime milk and CaCl 2 Calcium fluoride is formed with fluoride ions in the fluorine-containing wastewater and is precipitated in the first-stage sedimentation tank, the first-stage reaction tank is also used for adding PAC and PAM, coagulation reaction is carried out in the fluorine-containing wastewater, mud and water are separated in the first-stage sedimentation tank to realize primary fluorine removal, supernatant of the wastewater precipitated in the first-stage sedimentation tank enters the first-stage reaction tank, and the first-stage reaction tank and the first-stage sedimentation tank are matched to continuously treat the wastewater to realize secondary fluorine removal;
the ion exchange deep fluorine removal device is used for deeply removing fluorine from wastewater subjected to secondary fluorine removal, so that the water subjected to deep fluorine removal reaches the discharge standard.
2. The high efficiency heterojunction battery production wastewater treatment system of claim 1, wherein said different types of fluorine-containing wastewater comprise hydrofluoric acid wastewater, concentrated hydrochloric acid wastewater, concentrated alkali wastewater, fluorine-containing rinsing wastewater, alkali-containing wastewater, and wool making additive-containing rinsing wastewater, wherein said hydrofluoric acid wastewater, concentrated hydrochloric acid wastewater, and fluorine-containing rinsing wastewater are acidic wastewater, and said concentrated alkali wastewater, alkali-containing wastewater, and wool making additive-containing rinsing wastewater are alkaline wastewater.
3. The high-efficiency heterojunction cell production wastewater treatment system of claim 1, wherein the acidic wastewater adjusting tank and the alkaline wastewater adjusting tank are both provided with an aeration stirring device and a pH meter, the pH meter is used for detecting the pH value of the fluorine-containing wastewater, and the effluent flow of the acidic wastewater adjusting tank and the effluent flow of the alkaline wastewater adjusting tank are adjusted according to the pH value.
4. The high-efficiency heterojunction battery production wastewater treatment system of claim 1, further comprising a fluorine-containing sludge concentration tank, wherein the sludge precipitated in the first-stage sedimentation tank and the first-stage sedimentation tank enters the fluorine-containing sludge concentration tank, and the fluorine-containing sludge concentration tank concentrates the fluorine-containing sludge and then enters the fluorine-containing sludge filter press.
5. The high efficiency heterojunction battery production wastewater treatment system of claim 1, further comprising an ammonia nitrogen-containing wastewater treatment system, said ammonia nitrogen-containing wastewater treatment system comprising:
the device comprises a nitrogen-containing wastewater collection device, a wool making additive-containing concentrated alkali wastewater collection device, a defluorination reaction tank, a defluorination sedimentation tank, a nitrogen-containing sludge concentration tank, an ammonia-nitrogen-containing wastewater regulation tank, a multi-media filter, an activated carbon filter, a laminated filter, an ultrafiltration device, a reverse osmosis device, a concentrated water reverse osmosis device, an RO water production tank, an ultrafiltration water production tank, a reverse osmosis concentrated water tank, an ROR concentrated water tank and an MVR evaporator;
the method comprises the following steps that ammonia nitrogen-containing wastewater in a nitrogen-containing wastewater collection device and a wool making additive concentrated alkali wastewater collection device enters a defluorination reaction tank for defluorination, the defluorination reaction tank is used for adding lime milk and CaCl2 to form calcium fluoride with fluorine ions in fluorine-containing wastewater and precipitating in a defluorination sedimentation tank, the defluorination reaction tank is also used for adding PAC and PAM to perform coagulation reaction in the fluorine-containing wastewater and enable mud and water in the defluorination sedimentation tank to be separated to realize defluorination, the wastewater after defluorination enters an ammonia nitrogen-containing wastewater adjusting tank, sludge in the defluorination sedimentation tank enters a nitrogen-containing sludge concentration tank, and the nitrogen-containing sludge concentration tank concentrates the fluorine-containing sludge and then enters a nitrogen-containing sludge filter press;
the wastewater in the ammonia nitrogen-containing wastewater regulating tank passes through the multi-media filter, the activated carbon filter, the lamination filter and the ultrafiltration device in sequence by the lift pump, so that particle impurities below 0.1 micron in the wastewater are removed, and part of organic matters are removed;
the reverse osmosis device and the concentrated water reverse osmosis device are used for removing ions and COD in the wastewater, and the produced water of the reverse osmosis and the concentrated water reverse osmosis enters the RO water production tank and is conveyed to the cooling tower for water supplement or the absorption tower for water supplement by a pump;
the ultrafiltration water is fed into the reverse osmosis device through the reverse osmosis booster pump and the high-pressure pump for concentration, the reverse osmosis concentrated water is fed into the MVR evaporator for evaporation concentration after being temporarily stored in the ROR concentrated water tank, and the condensed water is pumped into the cooling tower for water supplement or the absorption tower for water supplement after being collected.
6. The high efficiency heterojunction battery production wastewater treatment system of claim 1, further comprising a copper-containing wastewater treatment system, said copper-containing wastewater treatment system comprising:
the copper-containing wastewater collection tank, the first-stage reaction tank II, the first-stage sedimentation tank II, the second-stage reaction tank II, the second-stage sedimentation tank II, the third-stage reaction tank and the third-stage sedimentation tank are connected in sequence; the copper-containing wastewater collected by the copper-containing wastewater collecting tank flows through the first-stage reaction tank II, the first-stage sedimentation tank II, the second-stage reaction tank II, the second-stage sedimentation tank II, the third-stage reaction tank and the third-stage sedimentation tank in sequence;
the first-stage reaction tank is used for adding a recapture agent and Ca (OH) 2 And ferrous sulfate, PAM, play the effect of reaction, catching, flocculation with the copper ion in the copper-containing waste water, form the flocculating constituent and subside in the second of one-level sedimentation tank, second of second grade reaction tank, second of second grade sedimentation tank, tertiary reaction tank, tertiary sedimentation tank continue to handle the waste water, realize tertiary materialization.
7. The high-efficiency heterojunction cell production wastewater treatment system according to claim 6, wherein the copper-containing wastewater treatment system further comprises a copper-containing sludge concentration tank, wherein the second primary sedimentation tank, the second secondary sedimentation tank and the third secondary sedimentation tank are connected with the copper-containing sludge concentration tank, sludge precipitated in the second primary sedimentation tank, the second secondary sedimentation tank and the third secondary sedimentation tank enters the copper-containing sludge concentration tank, and the copper-containing sludge concentration tank concentrates the copper-containing sludge and then enters a copper-containing sludge filter press.
8. A high-efficiency heterojunction battery production wastewater treatment method applied to the high-efficiency heterojunction battery production wastewater treatment system as claimed in any one of claims 1 to 7, wherein the method comprises a fluorine-containing wastewater treatment method, and the fluorine-containing wastewater treatment method is applied to the fluorine-containing wastewater treatment system, and comprises the following steps:
s11, collecting different types of fluoride-containing wastewater by using a plurality of fluoride-containing wastewater collecting devices, wherein the acid wastewater collected by the fluoride-containing wastewater collecting devices enters the first-stage reaction tank through the acid wastewater regulating tank, and the alkaline wastewater collected by the fluoride-containing wastewater collecting devices enters the first-stage reaction tank through the alkaline wastewater regulating tank;
s12, adding lime milk and CaCl into the first-stage reaction tank 2 Calcium fluoride is formed with fluoride ions in the fluorine-containing wastewater and is precipitated in the first-stage sedimentation tank, PAC and PAM are added into the first-stage reaction tank, coagulation reaction is carried out in the fluorine-containing wastewater, mud and water are separated in the first-stage sedimentation tank to realize primary fluorine removal, the wastewater precipitated in the first-stage sedimentation tank enters the first-stage reaction tank, and the first-stage reaction tank and the first-stage sedimentation tank are matched to continuously treat the wastewater to realize secondary fluorine removal;
s13, deeply removing fluorine from the wastewater subjected to secondary fluorine removal by using the ion exchange deep fluorine removal device to enable the water subjected to deep fluorine removal to reach a discharge standard;
s14, the sludge precipitated in the first-stage sedimentation tank and the second-stage sedimentation tank enters a fluorine-containing sludge concentration tank, and the fluorine-containing sludge is concentrated by the fluorine-containing sludge concentration tank and then enters a fluorine-containing sludge filter press.
9. A high-efficiency heterojunction battery production wastewater treatment method applied to the high-efficiency heterojunction battery production wastewater treatment system as claimed in claim 5, which is characterized by comprising an ammonia nitrogen-containing wastewater treatment method, wherein the ammonia nitrogen-containing wastewater treatment method is applied to the ammonia nitrogen-containing wastewater treatment system, and comprises the following steps:
s21, collecting ammonia nitrogen-containing wastewater by using the nitrogen-containing wastewater collection device and the wool making additive-containing concentrated alkali wastewater collection device, and adding lime milk and CaCl into the defluorination reaction tank 2 Calcium fluoride is formed with fluoride ions in the fluorine-containing wastewater and is precipitated in the defluorination sedimentation tank, PAC and PAM are continuously added into the defluorination reaction tank, coagulation reaction is carried out in the fluorine-containing wastewater, mud and water in the defluorination sedimentation tank are separated to realize defluorination, and the wastewater after defluorination enters the ammonia and nitrogen-containing wastewater adjusting tank;
s22, enabling the wastewater in the ammonia nitrogen-containing wastewater regulating tank to sequentially pass through the multi-media filter, the activated carbon filter, the lamination filter and the ultrafiltration device through a lift pump, removing particle impurities below 0.1 micrometer in the wastewater, and removing partial organic matters;
s23, feeding ultrafiltration produced water into the reverse osmosis device for concentration through a reverse osmosis booster pump and a high-pressure pump, feeding reverse osmosis concentrated water into the concentrated water reverse osmosis device for concentration, temporarily storing the concentrated water of the concentrated water reverse osmosis device in an ROR concentrated water tank, pumping the concentrated water into the MVR evaporator for evaporation and concentration, and pumping condensed water into a cooling tower for water supplement or an absorption tower for water supplement after collection;
s24, independently feeding the sludge generated by the ammonia nitrogen-containing wastewater treatment system into a separate sludge dewatering system for reduction.
10. A high-efficiency heterojunction battery production wastewater treatment method applied to the high-efficiency heterojunction battery production wastewater treatment system of any one of claims 6 to 7, wherein the method comprises a copper-containing wastewater treatment method, and the copper-containing wastewater treatment method is applied to the copper-containing wastewater treatment system, and comprises the following steps:
s31, collecting the copper-containing wastewater by using the copper-containing wastewater collecting tank, and adding a heavy catching agent and Ca (OH) into the first-stage reaction tank II 2 Ferrous sulfate and PAM play a role in reaction, capture and flocculation with copper ions in the copper-containing wastewater to form flocs which are settled in the first-stage sedimentation tank II;
s32, the second primary sedimentation tankThe effluent enters a second-stage reaction tank, and a heavy catching agent and Ca (OH) are added into the second-stage reaction tank 2 And ferrous sulfate and PAM, wherein the effluent of the second-stage reaction tank is subjected to sludge-water separation in the second-stage sedimentation tank;
s33, enabling the effluent of the second-stage sedimentation tank to enter the third-stage reaction tank, and adding a heavy catching agent and Ca (OH) into the third-stage reaction tank 2 The effluent of the third-stage reaction tank is clarified in the third-stage sedimentation tank and is fed into a discharge tank;
and S34, sludge obtained by the first-stage sedimentation tank II, the second-stage sedimentation tank II and the third-stage sedimentation tank enters the copper-containing sludge concentration tank, and the copper-containing sludge concentration tank concentrates the copper-containing sludge and then enters the copper-containing sludge filter press.
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