CN112174439A - LED chip manufacturing industry wastewater treatment engineering process - Google Patents

LED chip manufacturing industry wastewater treatment engineering process Download PDF

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CN112174439A
CN112174439A CN202011097886.8A CN202011097886A CN112174439A CN 112174439 A CN112174439 A CN 112174439A CN 202011097886 A CN202011097886 A CN 202011097886A CN 112174439 A CN112174439 A CN 112174439A
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wastewater
tank
enters
wastewater treatment
sludge
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刘嵩
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Shanghai Sanbang Water Treatment Technology Co ltd
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Shanghai Sanbang Water Treatment Technology Co ltd
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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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • 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
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • 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
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C02F1/583—Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing fluoride or fluorine compounds
    • 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
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
    • 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
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • 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
    • C02F2101/10—Inorganic compounds
    • C02F2101/12—Halogens or halogen-containing compounds
    • C02F2101/14—Fluorine or fluorine-containing compounds
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • C02F2103/346—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from semiconductor processing, e.g. waste water from polishing of wafers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/046—Recirculation with an external loop
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • 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
    • C02F2303/14—Maintenance of water treatment installations
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage

Abstract

The invention discloses a waste water treatment engineering process for LED chip manufacturing industry, wherein the waste water for the LED chip manufacturing industry needs to be processed into the following treatment systems: firstly, an acid-base wastewater treatment system, then a fluorine-containing wastewater treatment system and then a phosphorus-containing wastewater treatment system, wherein organic wastewater generated in phosphorus-containing wastewater is treated by organic wastewater, finally, sludge precipitated at the position is treated by sludge in a sedimentation tank, and the precipitated wastewater is treated by the system again. The implementation of the new technology enables the wastewater treatment to be more efficient and thorough, the effluent quality to be better, and the water source and the water are partially saved, thereby achieving the purpose of saving water.

Description

LED chip manufacturing industry wastewater treatment engineering process
Technical Field
The invention relates to the technical field of manufacturing wastewater treatment, in particular to a wastewater treatment engineering process for LED chip manufacturing industry.
Background
A Light Emitting Diode (LED) is a semiconductor Light Emitting device that converts electrical energy into optical energy. With the improvement of the light emitting diode technology, the light emitting diode is applied more and more in two fields of illumination and display as a novel high-efficiency solid light source. Compared with the existing lighting equipment, the LED lighting has the advantages of energy conservation, less power consumption, safety, environmental protection, long service life, firm structure, installation space saving and the like, so that the LED is taken as a new high and new technology industry in China and is developed rapidly in recent years. Meanwhile, because the unit water consumption of the LED products is high, along with the great increase of the product yield, the emission of a large amount of pollutants in the production process is inevitably caused, the emission amount of industrial wastewater is also increased in a leap manner, and how to effectively treat the wastewater becomes one of the main problems facing the industry and enterprises while the industry is greatly developed.
The main process flow for manufacturing the LED chip comprises the following steps: epitaxial wafer → cleaning → transparent electrode layer plating → transparent electrode pattern lithography → etching → photoresist removal → mesa pattern lithography → dry etching → photoresist removal → annealing → SiO2 deposition → window pattern lithography → SiO2 etching → photoresist removal → N pole pattern lithography → precleaning → plating film → peeling → annealing → P pole pattern lithography → plating film → grinding → cutting → chip → finished product test. The cleaning process in the process flow needs to consume ultrapure water, chemical reagents and organic solvents added during cleaning are discharged along with the cleaning liquid, and the wastewater contains pollutants such as dust particles, organic solvents, metal ions, inorganic acid and the like. Therefore, the LED chip industry project mainly generates wastewater containing pollutants of phosphorus, fluorine, acid, alkali, organic matters and the like.
The LED industry is a new and high-tech industry, and the rapid development thereof inevitably produces a large amount of wastewater pollutants, so how to effectively control and treat wastewater is also a major issue of the industry. Due to different production processes and differences in use of raw materials, medicaments and the like, the LED industrial wastewater has various types and relatively complex water quality.
Disclosure of Invention
The invention aims to provide a wastewater treatment engineering process for the LED chip manufacturing industry, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a waste water treatment engineering process for LED chip manufacturing industry is disclosed, wherein the waste water for LED chip manufacturing industry needs to be processed into the following treatment systems: firstly, an acid-base wastewater treatment system, then a fluorine-containing wastewater treatment system and then a phosphorus-containing wastewater treatment system, wherein organic wastewater generated in phosphorus-containing wastewater is treated by organic wastewater, finally, sludge precipitated at the position is treated by sludge in a sedimentation tank, and the precipitated wastewater is treated by the system again.
Further, the specific operation steps are as follows:
acid-base wastewater treatment system: firstly, putting acid-base wastewater into an acid-base wastewater adjusting tank, and aerating; then put into a PH adjusting tank 1 and a PH adjusting tank 2, and NaOH and H are put into the PH adjusting tank 1 and the PH adjusting tank 22SO4Then, the wastewater passes through a discharge water tank and then enters a Parshall tank, and is discharged after reaching the standard;
fluoride waste water treatment system: firstly, putting fluorine-containing wastewater into a fluorine-containing wastewater adjusting tank, and aerating; then the mixture enters a pH adjusting tank, and Ca (OH) is put into the pH adjusting tank2And CaCl2(ii) a Then put PAC and Ca (OH) into the coagulation tank through the coagulation tank2(ii) a Then, the wastewater enters a flocculation tank, and PAM is added into the flocculation tank; then the wastewater enters a fluorine-containing wastewater sedimentation tank; then the sewage enters a discharge water pool to be discharged after reaching the standard;
phosphorus wastewater treatment system: firstly, putting the phosphorus-containing wastewater into a phosphorus-containing wastewater adjusting tank, and aerating; then the mixture enters a PH adjusting tank, and Ca (OH) is added into the PH adjusting tank2And CaCl2(ii) a Then the mixture passes through a coagulation tank, PAC and Ca (OH) are put into the coagulation tank2(ii) a Then, the wastewater enters a flocculation tank, and PAM is added into the flocculation tank; then the wastewater enters a phosphorus-containing wastewater sedimentation tank; then entering a clean water pool; obtaining organic wastewater;
organic wastewater treatment system: firstly, putting organic wastewater in phosphorus-containing wastewater into an organic wastewater adjusting tank, and aerating; then the mixture enters a PH adjusting tank, NaOH and H are added into the PH adjusting tank2SO4Then the sewage enters a biochemical pool, and N/P is put into the biochemical pool and aerated; then, the solution enters a flocculation tank, and PAM is added; then entering an organic wastewater sedimentation tank; finally, the wastewater enters a discharge water pool to be discharged after reaching the standard;
a precipitated sludge treatment system: firstly, concentrating sludge through a sludge concentration tank; then the supernatant of the sludge passes through a filtering liquid pool; and (3) putting PAM into the sludge dewatering machine after the sludge under the supernatant passes through the sludge dewatering machine, allowing the dewatered water to enter a filtrate pool through a filter press, pressing the sludge into a cake shape for outward transportation, and allowing the wastewater in the filtrate pool to enter the filtrate pool again.
Further, in the acid-base wastewater treatment system, acid-base wastewater with pH of 2-12 firstly enters an acid-base wastewater adjusting tank for collection, the adjusting tank is used for adjusting water quantity and balancing water quality, then enters a two-stage neutralization reaction tank through a lift pump for adjusting pH value, and enters a discharge water tank after being adjusted to be neutral for standard discharge.
Further, in the fluorine-containing wastewater treatment system, after the fluorine-containing wastewater is collected by a fluorine-containing wastewater adjusting tank, fluoride ions in the wastewater are removed by adopting a calcium fluoride flocculation precipitation method; namely, under the acidic condition, adding neutralizing agent calcium ions into the wastewater to cause the wastewater to react as follows:
Ca2++F-＝CaF2↓
and (3) adjusting the pH value to be between 6 and 9, mixing the separated precipitate with a flocculating agent to form vanadium flowers, performing solid-liquid separation in a fluorine-containing wastewater sedimentation tank after flocculation is completed, and discharging the supernatant in the sedimentation tank after reaching the standard through a discharge water tank.
Furthermore, the phosphorus-containing wastewater is treated by a chemical precipitation method, wherein the chemical precipitation method is a method for generating chemical precipitation by reacting a chemical reagent with phosphorus in the wastewater to achieve the purpose of removing phosphorus, the chemical reagent adopted by the chemical precipitation method is generally aluminum salt, ferrous salt, lime, aluminum-iron polymer (AVR) and the like, and treated effluent enters an organic wastewater treatment system to be treated together with organic wastewater.
Further, the main pollutants of the organic wastewater are CODcr, BODS, TN and NH3-N, in the organic wastewater treatment system, the organic wastewater firstly enters an organic wastewater adjusting tank for collection, the adjusting tank is used for water quantity adjustment and water quality balance, then enters the pH value adjustment through a lift pump, the pH value is adjusted to be neutral before the wastewater enters a biochemical system, conditions are provided for stable operation of subsequent biochemical treatment, then the wastewater enters a biochemical tank, effluent of the biochemical tank enters a sedimentation tank for solid-liquid separation, and supernatant of the sedimentation tank is discharged after reaching the standard through a discharge tank;
the biochemical system has various processes, such as a hydrolytic acidification process, a contact oxidation process, an SBR process, an A/O process, a BARDENPHO process and the like, and the wastewater needs to be effectively treated by selecting a proper biochemical process according to the characteristics of water quality and treatment requirements.
And further, the sludge in the sedimentation tank enters a sludge concentration tank for concentration, the concentrated sludge enters sludge dewatering equipment through a pump, the sludge dewatering equipment can select a plate-and-frame filter press to press out mud cakes to be transported outwards, and the pressure filtrate enters a filtrate tank and then flows back to the regulating tank for retreatment.
Further, the waste water treatment station is as public auxiliary system, provides necessary guarantee for the main production line, ensures the risk regulation and control of upstream production accident to and the normal operating of low reaches processing system:
firstly, the method comprises the following steps: the waste water collection system adopts a closed pipeline for conveying, and the waste water treatment system is provided with a regulating tank and an accident tank, so that the influence of impact discharge of accident waste water on a subsequent treatment system is relieved;
secondly, the method comprises the following steps: the power supply of the wastewater treatment equipment adopts a double loop and is matched with a UPS system, so that the key equipment is ensured not to be powered off;
fourthly: the control system mainly comprises an on-site operation cabinet, an MCC cabinet, a PLC cabinet, an engineer station, a monitoring system, a matched software system and the like, adopts full-automatic online control to reach an unattended level, is provided with an online instrument for detection, and reflows for retreatment when the system treatment does not reach the standard so as to ensure the emission reaching the standard;
fifth, the method comprises the following steps: the wastewater treatment equipment adopts an N +1 equipment standby mode, and once the equipment fails, the standby device is immediately started to ensure the stable operation of the system.
Further, the wastewater treatment equipment comprises a water pump and a fan.
Compared with the prior art, the invention has the beneficial effects that: the implementation of the new technology enables the wastewater treatment to be more efficient and thorough, the effluent quality to be better, and the water source and the water are partially saved, thereby achieving the purpose of saving water. The method comprises the following specific steps:
1 filter backwash drainage
In an ultrapure water preparation system, backwashing drainage of a multi-media filter, an activated carbon filter and the like contains a large amount of suspended matters, if the backwashing drainage is directly drained into an acid-base wastewater treatment system of a wastewater system, the acid-base wastewater treatment system has no functions of precipitation and the like, so that the quality of effluent cannot be ensured, and the wastewater can be drained into a fluorine-containing wastewater treatment system or a precipitation system is additionally arranged in the acid-base wastewater treatment system.
The backwash water enters a fluorine-containing system, so that the concentration of fluorine ions in the wastewater is diluted, and crystal nuclei required by suspended matter precipitation are provided, so that the medicament consumption of the system is reduced by 20%, and the effluent pollutant index is reduced by 15%.
2 mixed bed regeneration wastewater
The mixed bed regeneration wastewater can enter an organic wastewater treatment system for uniform treatment due to good water quality.
3RO concentrated water
The RO concentrated water can be further processed by a recycling RO system, the produced water is used for a pure water preparation system, and the concentrated water is used for an exhaust gas washing system. Washing hydrofluoric acid waste gas to generate a small amount of fluorine-containing wastewater, and treating the wastewater in a fluorine-containing wastewater treatment system. Washing the volatile organic solvent to generate a small amount of organic wastewater, and treating the wastewater in an organic wastewater treatment system.
Drawings
FIG. 1 is a system block diagram of a wastewater treatment engineering process for LED chip manufacturing industry according to the present invention;
FIG. 2 is a diagram of an acid-base wastewater treatment system of the wastewater treatment engineering process of the LED chip manufacturing industry according to the present invention;
FIG. 3 is a diagram of a fluorine-containing wastewater treatment system of the wastewater treatment engineering process of the LED chip manufacturing industry according to the present invention;
FIG. 4 is a diagram of a phosphorus-containing wastewater treatment system of the wastewater treatment engineering process of the LED chip manufacturing industry according to the present invention;
FIG. 5 is a diagram of an organic wastewater treatment system of the wastewater treatment engineering process of the LED chip manufacturing industry according to the present invention
FIG. 6 is a system diagram of a sedimentation tank sludge treatment process in the wastewater treatment engineering of the LED chip manufacturing industry.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-6, the present invention provides a technical solution: a waste water treatment engineering process for LED chip manufacturing industry is disclosed, wherein the waste water for LED chip manufacturing industry needs to be processed into the following treatment systems: firstly, an acid-base wastewater treatment system, then a fluorine-containing wastewater treatment system and then a phosphorus-containing wastewater treatment system, wherein organic wastewater generated in phosphorus-containing wastewater is treated by organic wastewater, finally, sludge precipitated at the position is treated by sludge in a sedimentation tank, and the precipitated wastewater is treated by the system again.
In order to further improve the use function of the LED chip manufacturing wastewater treatment engineering process, the specific operation steps are as follows:
acid-base wastewater treatment system: firstly, putting acid-base wastewater into an acid-base wastewater adjusting tank, and aerating; then put into a PH adjusting tank 1 and a PH adjusting tank 2, and NaOH and H are put into the PH adjusting tank 1 and the PH adjusting tank 22SO4Then, the wastewater passes through a discharge water tank and then enters a Parshall tank, and is discharged after reaching the standard;
fluoride waste water treatment system: firstly, putting fluorine-containing wastewater into a fluorine-containing wastewater adjusting tank, and aerating; then the mixture enters a pH adjusting tank, and Ca (OH) is put into the pH adjusting tank2And CaCl2(ii) a Then put PAC and Ca (OH) into the coagulation tank through the coagulation tank2(ii) a Then, the wastewater enters a flocculation tank, and PAM is added into the flocculation tank; then the wastewater enters a fluorine-containing wastewater sedimentation tank; then the sewage enters a discharge water pool to be discharged after reaching the standard;
phosphorus wastewater treatment system: firstly, putting the phosphorus-containing wastewater into a phosphorus-containing wastewater adjusting tank, and aerating; then the mixture enters a PH adjusting tank, and Ca (OH) is added into the PH adjusting tank2And CaCl2(ii) a Then the mixture passes through a coagulation tank, PAC and Ca (OH) are put into the coagulation tank2(ii) a Then, the wastewater enters a flocculation tank, and PAM is added into the flocculation tank; then the wastewater enters a phosphorus-containing wastewater sedimentation tank; then entering a clean water pool; obtaining organic wastewater;
organic wastewater treatment system: firstly, putting organic wastewater in phosphorus-containing wastewater into an organic wastewater adjusting tank, and aerating; then the mixture enters a PH adjusting tank, NaOH and H are added into the PH adjusting tank2SO4Then the sewage enters a biochemical pool, and N/P is put into the biochemical pool and aerated; then, the solution enters a flocculation tank, and PAM is added; then entering an organic wastewater sedimentation tank; finally, the wastewater enters a discharge water pool to be discharged after reaching the standard;
a precipitated sludge treatment system: firstly, concentrating sludge through a sludge concentration tank; then the supernatant of the sludge passes through a filtering liquid pool; and (3) putting PAM into the sludge dewatering machine after the sludge under the supernatant passes through the sludge dewatering machine, allowing the dewatered water to enter a filtrate pool through a filter press, pressing the sludge into a cake shape for outward transportation, and allowing the wastewater in the filtrate pool to enter the filtrate pool again.
In order to further improve the use function of the LED chip manufacturing wastewater treatment engineering process, in an acid-base wastewater treatment system, acid-base wastewater with the pH value of 2-12 firstly enters an acid-base wastewater adjusting tank for collection, the adjusting tank is used for water quantity adjustment and water quality equalization, then enters a two-stage neutralization reaction tank through a lift pump for pH value adjustment, and enters a discharge water tank for standard discharge after being adjusted to be neutral.
In order to further improve the use function of the LED chip manufacturing wastewater treatment engineering process, in a fluorine-containing wastewater treatment system, after fluorine-containing wastewater is collected by a fluorine-containing wastewater adjusting tank, fluoride ions in the wastewater are removed by adopting a calcium fluoride flocculation precipitation method; namely, under the acidic condition, adding neutralizing agent calcium ions into the wastewater to cause the wastewater to react as follows:
Ca2++F-＝CaF2↓
and (3) adjusting the pH value to be between 6 and 9, mixing the separated precipitate with a flocculating agent to form vanadium flowers, performing solid-liquid separation in a fluorine-containing wastewater sedimentation tank after flocculation is completed, and discharging the supernatant in the sedimentation tank after reaching the standard through a discharge water tank.
In order to further improve the use function of the wastewater treatment engineering process in the LED chip manufacturing industry, the phosphorus-containing wastewater is treated by adopting a chemical precipitation method, wherein the chemical precipitation method is a method for generating chemical precipitation by reacting a chemical reagent with phosphorus in the wastewater to achieve the aim of removing phosphorus, the chemical reagent adopted by the chemical precipitation method is generally aluminum salt, ferrous salt, lime, aluminum-iron polymer (AVR) and the like, and the treated effluent enters an organic wastewater treatment system to be treated together with organic wastewater.
In order to further improve the use function of the LED chip manufacturing wastewater treatment engineering process, the main pollutants of the organic wastewater are CODcr, BODS, TN and NH3-N, in the organic wastewater treatment system, the organic wastewater firstly enters an organic wastewater adjusting tank for collection, the adjusting tank has the functions of water quantity adjustment and water quality balance, then enters the pH value adjustment through a lift pump, the pH value is adjusted to be neutral before the wastewater enters a biochemical system, conditions are provided for stable operation of subsequent biochemical treatment, then the wastewater enters a biochemical tank, the effluent of the biochemical tank enters a sedimentation tank for solid-liquid separation, and the supernatant of the sedimentation tank is discharged after reaching the standard through a discharge tank;
the biochemical system has various processes, such as a hydrolytic acidification process, a contact oxidation process, an SBR process, an A/O process, a BARDENPHO process and the like, and the wastewater needs to be effectively treated by selecting a proper biochemical process according to the characteristics of water quality and treatment requirements.
In order to further improve the use function of the LED chip manufacturing industry wastewater treatment engineering process, sludge in a sedimentation tank enters a sludge concentration tank for concentration, the concentrated sludge enters sludge dewatering equipment through a pump, the sludge dewatering equipment can be a plate-and-frame filter press, sludge cakes are pressed out and transported outwards for treatment, and filter press liquid enters a filter liquid tank and then flows back to a regulating reservoir for retreatment.
In order to further improve the use function of the LED chip manufacturing wastewater treatment engineering process, the wastewater treatment station serves as a public and auxiliary system to provide necessary guarantee for a main production line, ensure the risk regulation and control of upstream production accidents and the normal operation of a downstream treatment system:
firstly, the method comprises the following steps: the waste water collection system adopts a closed pipeline for conveying, and the waste water treatment system is provided with a regulating tank and an accident tank, so that the influence of impact discharge of accident waste water on a subsequent treatment system is relieved;
secondly, the method comprises the following steps: the power supply of the wastewater treatment equipment adopts a double loop and is matched with a UPS system, so that the key equipment is ensured not to be powered off;
fourthly: the control system mainly comprises an on-site operation cabinet, an MCC cabinet, a PLC cabinet, an engineer station, a monitoring system, a matched software system and the like, adopts full-automatic online control to reach an unattended level, is provided with an online instrument for detection, and reflows for retreatment when the system treatment does not reach the standard so as to ensure the emission reaching the standard;
fifth, the method comprises the following steps: the wastewater treatment equipment adopts an N +1 equipment standby mode, and once the equipment fails, the standby device is immediately started to ensure the stable operation of the system.
In order to further improve the use function of the LED chip manufacturing industry wastewater treatment engineering process, the wastewater treatment equipment comprises a water pump and a fan.
The implementation of the new technology enables the wastewater treatment to be more efficient and thorough, the effluent quality to be better, and the water source and the water are partially saved, thereby achieving the purpose of saving water.
In the embodiment of the method, the first step,
1 filter backwash drainage
In an ultrapure water preparation system, backwashing drainage of a multi-media filter, an activated carbon filter and the like contains a large amount of suspended matters, if the backwashing drainage is directly drained into an acid-base wastewater treatment system of a wastewater system, the acid-base wastewater treatment system has no functions of precipitation and the like, so that the quality of effluent cannot be ensured, and the wastewater can be drained into a fluorine-containing wastewater treatment system or a precipitation system is additionally arranged in the acid-base wastewater treatment system.
The backwash water enters a fluorine-containing system, so that the concentration of fluorine ions in the wastewater is diluted, and crystal nuclei required by suspended matter precipitation are provided, so that the medicament consumption of the system is reduced by 20%, and the effluent pollutant index is reduced by 15%.
2 mixed bed regeneration wastewater
The mixed bed regeneration wastewater can enter an organic wastewater treatment system for uniform treatment due to good water quality.
3RO concentrated water
The RO concentrated water can be further processed by a recycling RO system, the produced water is used for a pure water preparation system, and the concentrated water is used for an exhaust gas washing system. Washing hydrofluoric acid waste gas to generate a small amount of fluorine-containing wastewater, and treating the wastewater in a fluorine-containing wastewater treatment system. Washing the volatile organic solvent to generate a small amount of organic wastewater, and treating the wastewater in an organic wastewater treatment system.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. A waste water treatment engineering process for LED chip manufacturing industry is characterized in that: the LED chip manufacturing industry wastewater needs to be treated by the following treatment systems: firstly, an acid-base wastewater treatment system, then a fluorine-containing wastewater treatment system and then a phosphorus-containing wastewater treatment system, wherein organic wastewater generated in phosphorus-containing wastewater is treated by organic wastewater, finally, sludge precipitated at the position is treated by sludge in a sedimentation tank, and the precipitated wastewater is treated by the system again.
2. A waste water treatment engineering process for LED chip manufacturing industry is characterized in that: the specific operation steps are as follows:
acid-base wastewater treatment system: firstly, putting acid-base wastewater into an acid-base wastewater adjusting tank, and aerating; then put into a PH adjusting tank 1 and a PH adjusting tank 2, and NaOH and H are put into the PH adjusting tank 1 and the PH adjusting tank 22SO4Then, the wastewater passes through a discharge water tank and then enters a Parshall tank, and is discharged after reaching the standard;
fluoride waste water treatment system: firstly, putting fluorine-containing wastewater into a fluorine-containing wastewater adjusting tank, and aerating; then the mixture enters a pH adjusting tank, and Ca (OH) is put into the pH adjusting tank2And CaCl2(ii) a Then put PAC and Ca (OH) into the coagulation tank through the coagulation tank2(ii) a Then, the wastewater enters a flocculation tank, and PAM is added into the flocculation tank; then the wastewater enters a fluorine-containing wastewater sedimentation tank; then the sewage enters a discharge water pool to be discharged after reaching the standard;
phosphorus wastewater treatment system: firstly, putting the phosphorus-containing wastewater into a phosphorus-containing wastewater adjusting tank, and aerating; then the mixture enters a PH adjusting tank, and Ca (OH) is added into the PH adjusting tank2And CaCl2(ii) a Then the mixture passes through a coagulation tank, PAC and Ca (OH) are put into the coagulation tank2(ii) a Then, the wastewater enters a flocculation tank, and PAM is added into the flocculation tank; then the wastewater enters a phosphorus-containing wastewater sedimentation tank; then entering a clean water pool; obtaining organic wastewater;
organic wastewater treatment system: firstly, putting organic wastewater in phosphorus-containing wastewater into an organic wastewater adjusting tank, and aerating; then go intoAdding the mixture into a pH adjusting tank, and adding NaOH and H into the pH adjusting tank2SO4Then the sewage enters a biochemical pool, and N/P is put into the biochemical pool and aerated; then, the solution enters a flocculation tank, and PAM is added; then entering an organic wastewater sedimentation tank; finally, the wastewater enters a discharge water pool to be discharged after reaching the standard;
a precipitated sludge treatment system: firstly, concentrating sludge through a sludge concentration tank; then the supernatant of the sludge passes through a filtering liquid pool; and (3) putting PAM into the sludge dewatering machine after the sludge under the supernatant passes through the sludge dewatering machine, allowing the dewatered water to enter a filtrate pool through a filter press, pressing the sludge into a cake shape for outward transportation, and allowing the wastewater in the filtrate pool to enter the filtrate pool again.
3. The LED chip manufacturing industry wastewater treatment engineering process according to claim 2, characterized in that: in the acid-base wastewater treatment system, acid-base wastewater with pH value of 2-12 firstly enters an acid-base wastewater adjusting tank for collection, the adjusting tank is used for adjusting water quantity and balancing water quality, then enters a two-stage neutralization reaction tank through a lift pump for adjusting the pH value, and enters a discharge water tank to be discharged after being adjusted to be neutral.
4. The LED chip manufacturing industry wastewater treatment engineering process according to claim 2, characterized in that: in the fluorine-containing wastewater treatment system, after fluorine-containing wastewater is collected by a fluorine-containing wastewater adjusting tank, fluoride ions in the wastewater are removed by adopting a calcium fluoride flocculation precipitation method; namely, under the acidic condition, adding neutralizing agent calcium ions into the wastewater to cause the wastewater to react as follows:
Ca2++F-＝CaF2↓
and (3) adjusting the pH value to be between 6 and 9, mixing the separated precipitate with a flocculating agent to form vanadium flowers, performing solid-liquid separation in a fluorine-containing wastewater sedimentation tank after flocculation is completed, and discharging the supernatant in the sedimentation tank after reaching the standard through a discharge water tank.
5. The LED chip manufacturing industry wastewater treatment engineering process according to claim 2, characterized in that: the phosphorus-containing wastewater is treated by a chemical precipitation method, wherein the chemical precipitation method is a method for generating chemical precipitation by reacting a chemical reagent with phosphorus in the wastewater to achieve the aim of removing phosphorus, the chemical reagent adopted by the chemical precipitation method is generally aluminum salt, ferrous salt, lime, aluminum-iron polymer (AVR) and the like, and treated effluent enters an organic wastewater treatment system to be treated together with organic wastewater.
6. The LED chip manufacturing industry wastewater treatment engineering process according to claim 2, characterized in that: the main pollutants of the organic wastewater are CODcr, BODS, TN and NH3-N, in an organic wastewater treatment system, the organic wastewater firstly enters an organic wastewater adjusting tank for collection, the adjusting tank is used for water quantity adjustment and water quality balance, then enters the pH value adjustment through a lift pump, the pH value is adjusted to be neutral before the wastewater enters a biochemical system, conditions are provided for stable operation of subsequent biochemical treatment, then the wastewater enters a biochemical tank, effluent of the biochemical tank enters a sedimentation tank for solid-liquid separation, and supernatant of the sedimentation tank is discharged after reaching the standard through a discharge water tank;
the biochemical system has various processes, such as a hydrolytic acidification process, a contact oxidation process, an SBR process, an A/O process, a BARDENPHO process and the like, and the wastewater needs to be effectively treated by selecting a proper biochemical process according to the characteristics of water quality and treatment requirements.
7. The LED chip manufacturing industry wastewater treatment engineering process according to claim 2, characterized in that: and (3) the sludge in the sedimentation tank enters a sludge concentration tank for concentration, the concentrated sludge enters sludge dewatering equipment through a pump, the sludge dewatering equipment can select a plate and frame filter press, mud cakes are pressed out and transported outwards, and the pressure filtrate enters a filtrate tank and then flows back to the regulating reservoir for retreatment.
8. The LED chip manufacturing industry wastewater treatment engineering process according to claim 2, characterized in that: the wastewater treatment station is used as a public and auxiliary system, provides necessary guarantee for a main production line, and ensures the risk regulation and control of upstream production accidents and the normal operation of a downstream treatment system:
firstly, the method comprises the following steps: the waste water collection system adopts a closed pipeline for conveying, and the waste water treatment system is provided with a regulating tank and an accident tank, so that the influence of impact discharge of accident waste water on a subsequent treatment system is relieved;
secondly, the method comprises the following steps: the power supply of the wastewater treatment equipment adopts a double loop and is matched with a UPS system, so that the key equipment is ensured not to be powered off;
fourthly: the control system mainly comprises an on-site operation cabinet, an MCC cabinet, a PLC cabinet, an engineer station, a monitoring system, a matched software system and the like, adopts full-automatic online control to reach an unattended level, is provided with an online instrument for detection, and reflows for retreatment when the system treatment does not reach the standard so as to ensure the emission reaching the standard;
fifth, the method comprises the following steps: the wastewater treatment equipment adopts an N +1 equipment standby mode, and once the equipment fails, the standby device is immediately started to ensure the stable operation of the system.
9. The LED chip manufacturing industry wastewater treatment engineering process according to claim 8, characterized in that: the wastewater treatment equipment comprises a water pump and a fan.
CN202011097886.8A 2020-10-14 2020-10-14 LED chip manufacturing industry wastewater treatment engineering process Pending CN112174439A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109020035A (en) * 2018-09-06 2018-12-18 浙江海河环境科技有限公司 A kind of LED chip production wastewater treatment process method

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101028962A (en) * 2007-01-22 2007-09-05 扬州市恒通环保科技有限公司 Complete process for treating coated industrial waste water
TW200833615A (en) * 2007-02-07 2008-08-16 yan-hui Qiu Treatment method for fluorine-containing wastewater mixed with phosphoric acid
CN101549921A (en) * 2009-05-25 2009-10-07 宜兴市远博环保有限公司 Method for treating high-concentration phosphorus-contained wastewater
CN101973662A (en) * 2010-09-17 2011-02-16 北京国环清华环境工程设计研究院有限公司 Method and system for treating industrial wastewater of photovoltaic solar cell plates
CN104692560A (en) * 2015-03-03 2015-06-10 石泰山 Method for treating phosphorus/phosphine-containing electroplating wastewater
CN106186578A (en) * 2016-08-30 2016-12-07 江苏三和环保集团有限公司 A kind of coating wastewater processing system
CN109437438A (en) * 2018-12-15 2019-03-08 深圳市凯盛科技工程有限公司 TFT-LCD glass thinning waste water treatment system
CN109879550A (en) * 2019-04-08 2019-06-14 重庆港力环保股份有限公司 Photovoltaic cell produces waste water purification system
CN209259874U (en) * 2018-08-17 2019-08-16 南通盛世水业有限公司 A kind of wastewater collection and processing system
CN110386741A (en) * 2019-08-16 2019-10-29 晨光生物科技集团股份有限公司 A kind of stevioside production wastewater treatment recoverying and utilizing method

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101028962A (en) * 2007-01-22 2007-09-05 扬州市恒通环保科技有限公司 Complete process for treating coated industrial waste water
TW200833615A (en) * 2007-02-07 2008-08-16 yan-hui Qiu Treatment method for fluorine-containing wastewater mixed with phosphoric acid
CN101549921A (en) * 2009-05-25 2009-10-07 宜兴市远博环保有限公司 Method for treating high-concentration phosphorus-contained wastewater
CN101973662A (en) * 2010-09-17 2011-02-16 北京国环清华环境工程设计研究院有限公司 Method and system for treating industrial wastewater of photovoltaic solar cell plates
CN104692560A (en) * 2015-03-03 2015-06-10 石泰山 Method for treating phosphorus/phosphine-containing electroplating wastewater
CN106186578A (en) * 2016-08-30 2016-12-07 江苏三和环保集团有限公司 A kind of coating wastewater processing system
CN209259874U (en) * 2018-08-17 2019-08-16 南通盛世水业有限公司 A kind of wastewater collection and processing system
CN109437438A (en) * 2018-12-15 2019-03-08 深圳市凯盛科技工程有限公司 TFT-LCD glass thinning waste water treatment system
CN109879550A (en) * 2019-04-08 2019-06-14 重庆港力环保股份有限公司 Photovoltaic cell produces waste water purification system
CN110386741A (en) * 2019-08-16 2019-10-29 晨光生物科技集团股份有限公司 A kind of stevioside production wastewater treatment recoverying and utilizing method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
刘嵩: "LED芯片制造业废水处理工程工艺及优化", 《广州化工》, vol. 48, no. 12, pages 96 - 98 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109020035A (en) * 2018-09-06 2018-12-18 浙江海河环境科技有限公司 A kind of LED chip production wastewater treatment process method

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