CN203486993U - Recycling system of wastewater generated in production of polycrystalline silicon batteries - Google Patents

Recycling system of wastewater generated in production of polycrystalline silicon batteries Download PDF

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CN203486993U
CN203486993U CN201320514435.9U CN201320514435U CN203486993U CN 203486993 U CN203486993 U CN 203486993U CN 201320514435 U CN201320514435 U CN 201320514435U CN 203486993 U CN203486993 U CN 203486993U
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tank
nitrogen wastewater
water tank
recycling
water
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陈茂林
钱震
梅益军
孙华
谢贯虹
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Suzhou Sujing Environmental Engineering Co ltd
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Suzhou Sujing Environmental Engineering Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/33—Wastewater or sewage treatment systems using renewable energies using wind energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy

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Abstract

The utility model relates to a recycling system of wastewater generated in production of polycrystalline silicon batteries. The recycling system comprises a concentrated nitrogen wastewater treatment system and a dilute nitrogen wastewater treatment system which are connected with each other, wherein the concentrated nitrogen wastewater treatment system comprises a concentrated nitrogen wastewater adjusting tank, a reaction tank, a filter pressing device, a filtrate collection tank, a triple-effect evaporator and a centrifugal separation device which are connected with one another in sequence; the dilute nitrogen wastewater treatment system comprises a dilute nitrogen wastewater adjusting tank, a pH adjusting tank, a coagulation and flocculation tank, a precipitation tank, a middle water tank, a filtering water tank, an ultrafiltration device, a reverse osmosis membrane device, a recycling and collecting tank, an anion exchanger and a recycling water tank which are connected with one another in sequence. Through the recycling system of the wastewater generated in production of the polycrystalline silicon batteries, the concentrated nitrogen wastewater adjusting tank, the reaction tank, the filter pressing device, the triple-effect evaporator, the coagulation and flocculation tank, the precipitation tank, and the like are connected together for combined use, so that the nitrogen element in the wastewater can be effectively removed; meanwhile, the recycling water tank is used for recycling processed wastewater, so that the water resource is saved and the protection of environment is facilitated.

Description

A kind of reclaiming system of polycrystal silicon cell factory effluent
Technical field
The utility model relates to a kind of Waste Water Treatment, relates to particularly a kind of reclaiming system of polycrystal silicon cell factory effluent.
Background technology
Under the impact of global energy crisis, the development of renewable energy source industry more and more receives the concern of national governments.The inexhaustible clean energy that utilizes the Nature to give, as sun power, wind energy, tidal energy etc., not only can solve the problem of future source of energy shortage, also protection of the environment effectively.Under the promotion of relevant policies, rules, science and technology, the photovoltaic industry of China has obtained swift and violent development.Yet as the emerging industry of producing clean energy, the production process of polycrystal silicon cell is in fact also unclean, the polycrystal silicon cell factory effluent of discharging thus contains nitrogen, phosphorus, fluorine element, can cause serious environmental pollution and ecological damage.
On the other hand, shortage of water resources has become the important factor of restriction China's economy and social development.Industry water withdrawal accounts for 20% of national water withdrawal, for further strengthening Industrial Water Saving work, alleviate the imbalance between supply and demand of China's water resources, the impetus of containment water environment degradation, promote the coordinated development of industrial economy and water resources and environment, first the < < China water-saving technology policy outline > > promulgating for 2005 has proposed the requirement of the reuse of development efflux wastewater and " zero release " technology.In November, 2007, the new < < national environmental protection Eleventh Five-Year Plan > > promulgating of country more explicitly called for popularization cycling utilization of wastewater, strove for waste water and discharged less or zero release.
For the water saving that responds to the call of one's country; simultaneously protection of the environment, save enterprise's production cost, necessary polycrystal silicon cell factory effluent is carried out to clean, realize the zero release of nitrogen phosphorus; and then can recycle water resources, embody polycrystal silicon cell as the meaning of clean energy.
Summary of the invention
The utility model object is that a kind of system that can polycrystal silicon cell factory effluent be processed and be recycled is provided in order to overcome the deficiencies in the prior art.
For achieving the above object, the technical solution adopted in the utility model is: a kind of reclaiming system of polycrystal silicon cell factory effluent, it comprises interconnective dense nitrogen Waste Water Treatment and rare nitrogen Waste Water Treatment, described dense nitrogen Waste Water Treatment comprises the dense nitrogen wastewater equalization pond connecting successively, reaction tank, filter-pressing device, filtrate collection pond, triple-effect evaporator, centrifugal separating device, described rare nitrogen Waste Water Treatment comprises the rare nitrogen wastewater equalization pond connecting successively, pH regulator groove, coagulation-flocculation groove, settling bath, intermediate pool, water tank with strainer, ultra-filtration equipment, reverse osmosis membrane apparatus, reuse collecting tank, anion bed, reuse water tank, wherein said filtrate collection pond also respectively with centrifugal separating device, reverse osmosis membrane apparatus is connected, described triple-effect evaporator is connected with rare nitrogen wastewater equalization pond, described rare nitrogen wastewater equalization pond produces water tank with ultrafiltration and is connected.
Optimally, between described intermediate pool and water tank with strainer, be also connected with sand filter, disc filter, softening bed, deep bed filter in turn.
Optimally, between described reverse osmosis membrane apparatus and ultra-filtration equipment, be also provided with a set of reverse osmosis membrane apparatus.
Because technique scheme is used; the utility model compared with prior art has following advantages: the reclaiming system of the utility model polycrystal silicon cell factory effluent; the equipment connections such as dense nitrogen wastewater equalization pond, reaction tank, filter-pressing device, triple-effect evaporator, coagulation-flocculation groove, settling bath are got up to be used in combination; can effectively remove nitrogen in waste water, except element; and be provided with reuse water tank; to after processing, obtain waste water reclamation utilization, saved water resources, be conducive to protection of the environment.
Accompanying drawing explanation
Accompanying drawing 1 is the reclaiming system connection diagram of the utility model polycrystal silicon cell factory effluent;
Wherein: 101, dense nitrogen Waste Water Treatment; 102, rare nitrogen Waste Water Treatment; 1, dense nitrogen wastewater equalization pond; 2, reaction tank; 3, filter-pressing device; 4, filtrate collection pond; 5, triple-effect evaporator; 6, centrifugal separating device; 7, rare nitrogen wastewater equalization pond; 8, pH regulator groove; 9, coagulation-flocculation groove; 10, settling bath; 11, intermediate pool; 12, sand filter; 13, disc filter; 14, softening bed; 15, deep bed filter; 16, water tank with strainer; 17, ultra-filtration equipment; 18, reverse osmosis membrane apparatus; 18 ', reverse osmosis membrane apparatus; 19, reuse collecting tank; 20, anion bed; 21, reuse water tank.
Embodiment
Below in conjunction with accompanying drawing, the utility model preferred embodiment is elaborated:
The reclaiming system of polycrystal silicon cell factory effluent as shown in Figure 1, it mainly comprises interconnective dense nitrogen Waste Water Treatment 101 and rare nitrogen Waste Water Treatment 102.
Dense nitrogen Waste Water Treatment 101 comprises dense nitrogen wastewater equalization pond 1, reaction tank 2, filter-pressing device 3, filtrate collection pond 4, triple-effect evaporator 5, the centrifugal separating device 6 connecting successively, for dense nitrogen waste water is processed; Rare nitrogen Waste Water Treatment 102 comprises rare nitrogen wastewater equalization pond 7, pH regulator groove 8, coagulation-flocculation groove 9, settling bath 10, intermediate pool 11, water tank with strainer 16, ultra-filtration equipment 17, reverse osmosis membrane apparatus 18, reuse collecting tank 19, anion bed 20, the reuse water tank 21 connecting successively; be used for rare nitrogen waste water, containing phosphorus waste liquid, process; and get up obtaining wastewater collection after processing; recycle; protect water resources, saved production cost.Wherein filtrate collection pond 4 is also connected with centrifugal separating device 6, reverse osmosis membrane apparatus 18 respectively, is respectively used to receive the parting liquid of centrifugal separating device 6 generations and the dope that reverse osmosis membrane apparatus 18 produces; Triple-effect evaporator 5 is connected with rare nitrogen wastewater equalization pond 7, for the water of condensation that triple-effect evaporator 5 is produced, introduces rare nitrogen wastewater equalization pond 7, this water of condensation is further processed, to reach the requirement of recovery; Rare nitrogen wastewater equalization pond 7 and ultrafiltration are produced water tank 17 and are connected, and ultrafiltration is produced to dense water that water tank 17 produces and introduce rare nitrogen wastewater equalization pond 7 and further process, and improve the producing water ratio of dense water.
In the present embodiment, in order further to promote the water quality of processed waste water, between intermediate pool 11 and water tank with strainer 16, be connected successively sand filter 12, disc filter 13, softening bed 14, deep bed filter 15, be respectively used to processed waste water to carry out filtration treatment; Between reverse osmosis membrane apparatus 18 and ultra-filtration equipment 17, be also provided with a set of reverse osmosis membrane apparatus 18 ', with balance equipment cost and effluent quality.
The above-mentioned reclaiming system structure to the utility model polycrystal silicon cell factory effluent is illustrated, and its principle of work is done to brief description below:
According to different process, produce the water quality characteristics of waste water, the dense nitrogen waste water such as nitrogenous waste gas washing water, the draining of nitrogenous dope groove are imported to dense nitrogen wastewater equalization pond 1, rare nitrogen waste water such as phosphorus-containing wastewater, nitrogenous acid tank rinse water are imported to rare nitrogen wastewater equalization pond 7 and collect respectively.
As shown in Figure 1, dense nitrogen waste water is promoted to reaction tank 2 through pump, add NaOH to carry out neutralization reaction, and fully stir, adjust pH to 6.5 ~ 7.5, add flocculation agent cationic polyacrylamide PAM to produce cotton-shaped solid, and then add coagulant polymeric aluminium chloride PAC to make cotton-shaped solid become large precipitation, and unlatching pneumatic pump is pumped in filter-pressing device 3 carries out press filtration, and filtrate enters filtrate collection pond 4, the dewatered sludge outer processing of entrusting, reduces environmental pollution.Then the nitrogenous dope in filtrate collection pond 4 is pumped into evaporative crystallization in triple-effect evaporator 5, a gained part is crystallization concentrated solution, import through centrifugal from device 6 through centrifugation, filter out solid crystal, committee is outer to process, and mother liquor returns to triple-effect evaporator 5 and continues evaporative crystallization; Another part is phlegma, imports rare nitrogen wastewater equalization pond 7.
In rare nitrogen wastewater equalization pond 7, rare nitrogen waste liquid promotes and enters pH adjustment tank 8 through pump, adds 600 ~ 1200mg/L Ca (OH) 2to remove the fluorion in waste water, add subsequently NaOH solution to regulate pH to 7.8 ~ 8.2, enter coagulation-flocculation groove 9, add PAC, PAC concentration is controlled and is less than 20ppm, then adds PAM, and PAM concentration is controlled and is less than 1ppm.Mixed solution enters settling bath 10 and carries out precipitate and separate, and supernatant liquor enters intermediate pool 11, and sludge part committee is outer to process.
Intermediate pool 11 water outlets are promoted to sand filter 12 through pump, and sand filtration is set to automatic back-washing, and scavenging period is 300min; Sand filtration is produced water and is imported disc filter 13, and dish filter scavenging period is 30min, and rear product water enters softening bed 14, and softening bed scavenging period is 480min, produces water and enter water tank with strainer 16 after the deep bed filter 15 of 200 μ m filters.Water tank with strainer water outlet promotes and enters ultra-filtration equipment 17 through pump, obtains ultrafiltration and produce water and ultrafiltration dope after wherethrough reason, and wherein ultrafiltration dope is back in rare nitrogen wastewater equalization pond 7, and quantity of reflux is 25%.In the present embodiment ultra-filtration equipment 17 except general just wash with backwash, be also provided with the matting of certain frequency, wherein chemical reagent is HCl, NaOH and NaClO, promotes the product water water quality of ultra-filtration equipment 17.Ultrafiltration is produced water and is promoted and enter in reverse osmosis system RO ' 18 ' through pump, then enters in reverse osmosis system RO18, and their the product water rate of recovery is greater than respectively 65% and 50%, and the generation that two cover reverse osmosis systems are conducive to fully reduce dope is set.The dope that RO18 produces imports in filtrate collection pond 4, and RO ' 18 ', the product water of RO18 enters reuse collecting tank 19, through pump, promote and enter anion bed 20, except the NO in anhydrating 3 -, PO 4 3-, enter reuse water tank 21, stand-by.
Water quality before and after the reclaiming system of the utility model polycrystal silicon cell factory effluent is processed is as follows:
Figure 2013205144359100002DEST_PATH_IMAGE002
COD wherein crorganic substance relative content in the water that expression employing potassium dichromate standard method calculates, NH 3-N represents ammonia-nitrogen content, and T-N represents total nitrogen content, and T-P represents total phosphorous, F -represent content of fluoride ion.As seen from the above table, after adopting aforesaid method and system to process waste water, the denitrification percent of rare nitrogen waste water is more than 80%, and the denitrification percent of dense nitrogen waste water is more than 99%, and the clearance of COD is more than 99%, F -clearance, more than 99%, has reached the standard of discharge of wastewater or recycling.
Above-described embodiment is only explanation technical conceive of the present utility model and feature; its object is to allow person skilled in the art can understand content of the present utility model and implement according to this; can not limit protection domain of the present utility model with this; all equivalences of doing according to the utility model spirit change or modify, within all should being encompassed in protection domain of the present utility model.

Claims (3)

1. the reclaiming system of a polycrystal silicon cell factory effluent, it comprises interconnective dense nitrogen Waste Water Treatment (101) and rare nitrogen Waste Water Treatment (102), it is characterized in that: described dense nitrogen Waste Water Treatment (101) comprises the dense nitrogen wastewater equalization pond (1) connecting successively, reaction tank (2), filter-pressing device (3), filtrate collection pond (4), triple-effect evaporator (5), centrifugal separating device (6), described rare nitrogen Waste Water Treatment (102) comprises the rare nitrogen wastewater equalization pond (7) connecting successively, pH regulator groove (8), coagulation-flocculation groove (9), settling bath (10), intermediate pool (11), water tank with strainer (16), ultra-filtration equipment (17), reverse osmosis membrane apparatus (18), reuse collecting tank (19), anion bed (20), reuse water tank (21), wherein said filtrate collection pond (4) also respectively with centrifugal separating device (6), reverse osmosis membrane apparatus (18) is connected, and described triple-effect evaporator (5) is connected with rare nitrogen wastewater equalization pond (7), and described rare nitrogen wastewater equalization pond (7) produces water tank (17) with ultrafiltration and is connected.
2. the reclaiming system of polycrystal silicon cell factory effluent according to claim 1, is characterized in that: between described intermediate pool (11) and water tank with strainer (16), be also connected with sand filter (12), disc filter (13), softening bed (14), deep bed filter (15) in turn.
3. the reclaiming system of polycrystal silicon cell factory effluent according to claim 1, is characterized in that: between described reverse osmosis membrane apparatus (18) and ultra-filtration equipment (17), be also provided with a set of reverse osmosis membrane apparatus (18 ').
CN201320514435.9U 2013-08-22 2013-08-22 Recycling system of wastewater generated in production of polycrystalline silicon batteries Withdrawn - After Issue CN203486993U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103466871A (en) * 2013-08-22 2013-12-25 苏州苏净环保工程有限公司 Treatment method and recycling system for industrial wastewater of polycrystalline silicon batteries
CN113620490A (en) * 2020-05-08 2021-11-09 无锡蓝湾资源再生科技有限公司 Recycling process system for treating nitrogen and phosphorus-containing wastewater

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103466871A (en) * 2013-08-22 2013-12-25 苏州苏净环保工程有限公司 Treatment method and recycling system for industrial wastewater of polycrystalline silicon batteries
CN103466871B (en) * 2013-08-22 2014-09-10 苏州苏净环保工程有限公司 Treatment method and recycling system for industrial wastewater of polycrystalline silicon batteries
CN113620490A (en) * 2020-05-08 2021-11-09 无锡蓝湾资源再生科技有限公司 Recycling process system for treating nitrogen and phosphorus-containing wastewater

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