CN105884149B - The waste water treatment process of electroplate factory - Google Patents
The waste water treatment process of electroplate factory Download PDFInfo
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- CN105884149B CN105884149B CN201610485171.7A CN201610485171A CN105884149B CN 105884149 B CN105884149 B CN 105884149B CN 201610485171 A CN201610485171 A CN 201610485171A CN 105884149 B CN105884149 B CN 105884149B
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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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
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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
- 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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/001—Upstream control, i.e. monitoring for predictive control
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/003—Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
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Abstract
The present invention discloses a kind of waste water treatment process of electroplate factory, the process for precipitating filtering, the biodegrade of waste water and clear water outlet of waste water separation, waste water including mixing after Wastewater Pretreatment, in intermediate water reuse system；Chromate waste water, nickel-containing waste water and the comprehensive wastewater in electroplate factory are pre-processed respectively first, to substantially reduce the chromium tenor in chromate waste water, other content of beary metal in nickel tenor and comprehensive wastewater in nickel-containing waste water.Three kinds of pretreated waste water are mixed again, and the further precipitating, ammonia and nitrogen organic of progress heavy metal and the degradation of COD, technique waste water of the invention is finally made to reach defined wastewater discharge standard.
Description
Technical field
The present invention relates to the technical field of wastewater treatment more particularly to a kind of waste water treatment process of electroplate factory.
Background technique
With the progress of human civilization science and technology, and different surfaces is carried out due to its different function to product
Therefore processing also results in the serious destruction of ecological environment, has also seriously endangered the health of the mankind.Thus various countries are to protect
While demonstrate,proving industrial development, stringent discharge standard also is taken to the discharge of waste water and gas.
In the prior art, waste water caused by the chromium-treated factory of general plating nickel on surface be all nickel waste water, chromium waste water and
Comprehensive wastewater (waste water etc. that degreasing, derusting, cleaning, ground flushing water and acid mist absorb), it is now domestic also with science and technology into
Exhibition and environmental protection have risen year by year the discharge standard of waste water, that is, the Pearl River Delta by DB44/26-2001 to the health factor of human body
Wastewater discharge standard value is promoted to the Pearl River Delta wastewater discharge standard value of present DB44/1597/2015.
Summary of the invention
Shortcoming present in view of the above technology, the present invention provide a kind of electroplate factory that structure is simple and convenient to operate
Waste water treatment process.
In order to achieve the above object, a kind of waste water treatment process of electroplate factory of the present invention, comprises the following steps that:
It is mixed after S1, Wastewater Pretreatment
The pretreatment of chromate waste water: the chromate waste water recycled from electrodeposited chromium workshop initially enters brokenly chromium pond, in broken chromium pond
Under reducing agent effect, Cr VI is converted into trivalent chromium；Waste water containing trivalent chromium enters the first pH containing chromium adjustment pond and adjusts pH value=7
~8；After pH value regulates, waste water, which enters to contain in the multi-functional sedimentation basin of chromium, is converted into sediment state for trivalent chromic ion, and will
The filtrate that overflow goes out after precipitating is introduced into adjusting pH value=6~9 in the second conditioning tank of pH containing chromium；Adjusted pH value again contains chromium
Waste water enters in chromium system ion exchange system, carries out ion exchange through weak-acid cation-exchange resin, and further removal is free
State chromium ion；
The pretreatment of nickel-containing waste water: the nickel-containing waste water recycled from electronickelling workshop is directly entered the first nickeliferous pH adjustment pond tune
Save pH value=10~11；After pH value regulates, waste water, which enters in nickeliferous multi-functional sedimentation basin, is converted into sediment shape for nickel ion
State, and the filtrate that overflow after precipitating goes out is introduced into adjusting pH value=6~9 in the second nickeliferous pH conditioning tank；PH was adjusted again
The nickel-containing waste water of value enters in nickel system ion exchange system, carries out ion exchange through weak-acid cation-exchange resin, further
Remove free state nickel ion；
The pretreatment of pre-treatment comprehensive wastewater: the heavy metal wastewater thereby contained in addition to chromium, nickel recycled from pre-treatment workshop, acid
Property waste water and alkaline waste water be directly entered the first comprehensive pH adjustment pond and adjust pH value=6~9；After pH value regulates, waste water into
Enter in integrated multifunctional sedimentation basin and various free state ions are converted into sediment state, and the filtrate that overflow after precipitating goes out is drawn
Enter and adjusts pH value=6~9 into the second comprehensive pH conditioning tank；
Chromate waste water, nickel-containing waste water after pretreatment and pre-treatment after pretreatment after pretreatment are comprehensive useless
Water is driven into intermediate water reuse system, is handled into next step；
Waste water separation in S2, intermediate water reuse system: including two outlets in intermediate water reuse system, wherein 65% waste water
Discharge flows back into the pre-electroplating treatment cleaning process of electroplate factory from primary outlet, and the waste water of residue 35% is exported from second
In escape and enter and carry out further purified treatment in concentrated water collecting pit；
The precipitating filtering of S3, waste water: the waste water in concentrated water collecting pit enters in electric flocculation system after flocculation sedimentation, into
Enter and carry out further precipitation process in the multi-functional sedimentation basin of concentrated water, the waste water after precipitation process, which enters in concentrated water pH adjustment pond, to be adjusted
Save pH value=6~9；
The biodegrade of S4, waste water: the waste water after adjusting pH value, which enters in acidizing hydrolyzation tank, is hydrolyzed reaction, and hydrolysis is anti-
Waste water after answering be introduced into level-one biodegrade system degradation water in COD, ammonia and nitrogen organic, enter back into two stage biological degradation system
System is further degraded the COD not reacted completely also, ammonium oxidation object；
S5, clear water outlet: completing by biodegradable wastewater treatment, successively enters recoil pond and clear water reserviors are medium
Rear outlet up to standard to be detected.
Wherein, during the Wastewater Pretreatment of S1, the chromate waste water recycled from electroplating workshop sequentially enters sand setting containing chromium
The concentration that chromium system waste water is carried out in pond and chromate waste water conditioning tank is adjusted, after then carrying out waste water acidification by acidification pool, into
Enter brokenly and carry out redox reaction in chromium pond, enters back into the pH value for adjusting chromate waste water in the first pH containing chromium adjustment pond；From plating
The nickel-containing waste water of workshop recycling sequentially enters the concentration tune that nickel system waste water is carried out in nickeliferous setting pot and nickel-containing waste water conditioning tank
Section, subsequently into the pH value for adjusting nickel-containing waste water in the first nickeliferous pH adjustment pond；From pre-treatment workshop recycle containing except chromium, nickel with
Outer heavy metal wastewater thereby, acid waste water and alkaline waste water sequentially enter in comprehensive setting pot and pre-treatment wastewater equalization pond into
The concentration of row comprehensive wastewater is adjusted, subsequently into the pH value for adjusting comprehensive wastewater in comprehensive pH adjustment pond.
Wherein, the first conditioning tank of pH containing chromium includes preceding conditioning tank and rear conditioning tank, and the preceding conditioning tank receives in broken chromium pond
Processing waste water precipitated, and the waste water after precipitation process squeezed into rear conditioning tank by second lift pump carry out it is further
Precipitation process.
Wherein, during the Wastewater Pretreatment of S1, chromate waste water successively enters after the first pH containing chromium adjusts pond
Chromium system coagulating basin and chromium system help solidifying pond to convert sediment containing chromium for free state chromium, just enter the multi-functional sedimentation basin containing chromium later
It is middle to carry out further precipitation process；Nickel-containing waste water behind the first nickeliferous pH adjustment pond, successively enter nickel system coagulating basin with
And nickel system helps solidifying pond to convert nickeliferous sediment for free state chromium, just enters in nickeliferous multi-functional sedimentation basin carry out further later
Precipitation process；Comprehensive wastewater successively helps solidifying pond into comprehensive coagulating basin and synthesis behind the first comprehensive pH adjustment pond
Sediment is converted by free state heavy metal, just enters in integrated multifunctional sedimentation basin carry out further precipitation process later.
Wherein, the mistake containing in the multi-functional sedimentation basin of chromium, nickeliferous multi-functional sedimentation basin and integrated multifunctional sedimentation basin
Drainage and silt layer are discharged from bottom of pond, and cross after drainage further adsorbs heavy metal ion as filter layer using silt layer again
Bottom of pond is excluded, silt layer is extracted out by filter press and is pressed into mud cake and transported.
Wherein, during the Wastewater Pretreatment of S1, chromate waste water is filtered after the second pH containing chromium adjusts pond into sand
System further removes sediment, and filtered chromate waste water enters the ion exchange system of system containing chromium and removes chromium ion；Nickel-bearing Waste
Water further removes sediment into husky filter system, filtered nickel-containing waste water enters behind the second nickeliferous pH adjustment pond
Nickeliferous system's ion exchange system removes nickel ion.
Wherein, in the precipitating filter process of the waste water of S3, the concentrated water in concentrated water collecting pit squeezes into flocculation by elevator pump and sinks
In the system of shallow lake, flocculation sedimentation system removes heavy metal and COD in water in such a way that high-voltage dc pulse is electrolysed, then again
Into precipitation process is carried out in the multi-functional sedimentation basin of concentrated water, the filtrate in the multi-functional sedimentation basin of concentrated water enters dense after bottom of pond discharge
In water pH conditioning tank, the silt layer in the multi-functional sedimentation basin of concentrated water is extracted out by filter press and is pressed into mud cake and transported.
Wherein, in the biodegradation process of the waste water of S4, level-one biodegrade system include the pond BAF-DN/C one and
The ammonia nitrogen that the pond BAF-DN/C two, the pond BAF-DN/C one and the pond BAF-DN/C two are all made of in contact oxidation method degrading waste water is organic
Object and COD, the concentrated water handled through level-one biodegrade system enter in two stage biological degeneration system, two stage biological degeneration system
Including the pond BAF-C/N one and the pond BAF-C/N two, it is further that the pond BAF-C/N one and the pond BAF-C/N two are all made of biofilm
Ammonia and nitrogen organic and COD in degradation water.
Wherein, in the broken chromium pond of S1, it is sodium hydrogensulfite that Cr VI, which is converted into the reducing agent that trivalent chromium uses, in S1
In the first pH containing chromium adjustment pond, the second pH containing chromium adjustment pond, the first nickeliferous pH adjustment pond, the second nickeliferous pH adjustment pond, first
The basifier use in the comprehensive adjustment pond pH and the second comprehensive pH adjustment pond is sodium hydroxide, acidification pool in S1 and
The acidulant that acidizing hydrolyzation tank in S4 uses is sulfuric acid.
Wherein, in the pretreatment of the chromate waste water of S1, into the inlet of the setting pot containing chromium offer to total chrome content,
The equipment that content of 6-valence Cr ions is detected and analyzed automatically offers in the exit of chromium system ion exchange system and contains to total chromium
The equipment that amount, content of 6-valence Cr ions are detected automatically, analyzed and alarmed；In the pretreatment of the nickel-containing waste water of S1, entrance is nickeliferous
The inlet of setting pot offers the equipment that total nickel content is detected and analyzed automatically, in going out for nickel system ion exchange system
The equipment that total nickel content is detected automatically, analyzes and alarmed is offered at mouthful；During S5 clear water outlet, back-flushing
Automatic detection, analysis and the alarm for detecting indices respectively is provided at pond and clear water reserviors China and foreign countries outlet to set
It is standby.
The beneficial effects of the present invention are:
Compared with prior art, the waste water treatment process of electroplate factory of the invention, first by electroplate factory chromate waste water,
Nickel-containing waste water and comprehensive wastewater are pre-processed respectively, to substantially reduce chromium tenor, the nickel-containing waste water in chromate waste water
In nickel tenor and comprehensive wastewater in other content of beary metal.Three kinds of pretreated waste water are mixed again,
And the further precipitating, ammonia and nitrogen organic of progress heavy metal and the degradation of COD, reach technique waste water of the invention
To defined wastewater discharge standard.
Detailed description of the invention
Fig. 1 is the process flow diagram of the waste water treatment process of electroplate factory of the present invention；
Fig. 2 is the chromate waste water pretreating process flow chart of the waste water treatment process of electroplate factory of the present invention；
Fig. 3 is the nickel-containing waste water pretreating process flow chart of the waste water treatment process of electroplate factory of the present invention；
Fig. 4 is the comprehensive wastewater pretreating process flow chart of the waste water treatment process of electroplate factory of the present invention；
Fig. 5 is the process flow chart after the intermediate water reuse system of the waste water treatment process of electroplate factory of the present invention；
Fig. 6 is ×× metallo-plastic company wastewater environment monitoring report text one in 2015；
Fig. 7 is ×× metallo-plastic company wastewater environment monitoring report text two in 2015；
Fig. 8 is ×× metallo-plastic company wastewater environment monitoring report text three in 2015；
Fig. 9 is ×× metallo-plastic company wastewater environment monitoring report text four in 2015；
Figure 10 is ×× metallo-plastic company wastewater environment monitoring report text five in 2015；
Figure 11 is ×× metallo-plastic company wastewater environment monitoring report text six in 2015；
Figure 12 is ×× metallo-plastic company wastewater environment monitoring report text one in 2015；
Figure 13 is ×× metallo-plastic company wastewater environment monitoring report text two in 2013；
Figure 14 is ×× metallo-plastic company wastewater environment monitoring report text three in 2013；
Figure 15 is ×× metallo-plastic company wastewater environment monitoring report text four in 2013；
Figure 16 is ×× metallo-plastic company wastewater environment monitoring report text five in 2013；
Figure 17 is ×× metallo-plastic company wastewater environment monitoring report text six in 2013.
Specific embodiment
In order to more clearly state the present invention, the present invention is further described with reference to the accompanying drawing.
Refering to fig. 1-5, a kind of waste water treatment process of electroplate factory of the present invention, comprises the following steps that:
It is mixed after S1, Wastewater Pretreatment
The pretreatment of chromate waste water: the chromate waste water recycled from electrodeposited chromium workshop initially enters brokenly chromium pond, in broken chromium pond
Under reducing agent effect, Cr VI is converted into trivalent chromium；Waste water containing trivalent chromium enters the first pH containing chromium adjustment pond and adjusts pH value=7
~8；After pH value regulates, waste water, which enters to contain in the multi-functional sedimentation basin of chromium, is converted into sediment state for trivalent chromic ion, and will
The filtrate that overflow goes out after precipitating is introduced into adjusting pH value=6~9 in the second conditioning tank of pH containing chromium；Adjusted pH value again contains chromium
Waste water enters in chromium system ion exchange system, carries out ion exchange through weak-acid cation-exchange resin, and further removal is free
State chromium ion；The chromate waste water recycled from electroplating workshop, which sequentially enters in setting pot containing chromium and chromate waste water conditioning tank, carries out chromium
Be that the concentration of waste water is adjusted, then by acidification pool progress waste water acidification after, into carrying out redox reaction in broken chromium pond, then
Into the pH value for adjusting chromate waste water in the first pH containing chromium adjustment pond；Chromate waste water by the first pH containing chromium adjust pond after, first
Enter chromium system coagulating basin afterwards and chromium system helps solidifying pond to convert sediment containing chromium for free state chromium, just enters later multi-functional containing chromium
Further precipitation process is carried out in sedimentation basin；Chromate waste water by the second pH containing chromium adjust pond after, into husky filter system into
One step removes sediment, and filtered chromate waste water enters the ion exchange system of system containing chromium and removes chromium ion；
The pretreatment of nickel-containing waste water: the nickel-containing waste water recycled from electronickelling workshop is directly entered the first nickeliferous pH adjustment pond tune
Save pH value=10~11；After pH value regulates, waste water, which enters in nickeliferous multi-functional sedimentation basin, is converted into sediment shape for nickel ion
State, and the filtrate that overflow after precipitating goes out is introduced into adjusting pH value=6~9 in the second nickeliferous pH conditioning tank；PH was adjusted again
The nickel-containing waste water of value enters in nickel system ion exchange system, carries out ion exchange through weak-acid cation-exchange resin, further
Remove free state nickel ion；The nickel-containing waste water recycled from electroplating workshop sequentially enters nickeliferous setting pot and nickel-containing waste water conditioning tank
The middle concentration for carrying out nickel system waste water is adjusted, subsequently into the pH value for adjusting nickel-containing waste water in the first nickeliferous pH adjustment pond；Nickel-bearing Waste
Water successively helps solidifying pond to convert free state chromium to and contains behind the first nickeliferous pH adjustment pond into nickel system coagulating basin and nickel system
Nickel sediment just enters in nickeliferous multi-functional sedimentation basin carry out further precipitation process later；Nickel-containing waste water is passing through second
Behind nickeliferous pH adjustment pond, sediment is further removed into husky filter system, filtered nickel-containing waste water is handed over into nickeliferous system's ion
It changes system and removes nickel ion；
The pretreatment of pre-treatment comprehensive wastewater: the heavy metal wastewater thereby contained in addition to chromium, nickel recycled from pre-treatment workshop, acid
Property waste water and alkaline waste water be directly entered the first comprehensive pH adjustment pond and adjust pH value=6~9；After pH value regulates, waste water into
Enter in integrated multifunctional sedimentation basin and various free state ions are converted into sediment state, and the filtrate that overflow after precipitating goes out is drawn
Enter and adjusts pH value=6~9 into the second comprehensive pH conditioning tank；The heavy metal contained in addition to chromium, nickel recycled from pre-treatment workshop
Waste water, acid waste water and alkaline waste water sequentially enter in comprehensive setting pot and pre-treatment wastewater equalization pond and carry out comprehensive wastewater
Concentration adjust, subsequently into the pH value for adjusting comprehensive wastewater in comprehensive pH adjustment pond；Comprehensive wastewater is by the first comprehensive pH
After adjusting pond, successively help solidifying pond to convert sediment for free state heavy metal into comprehensive coagulating basin and synthesis, later just into
Enter and carries out further precipitation process in integrated multifunctional sedimentation basin；
Chromate waste water, nickel-containing waste water after pretreatment and pre-treatment after pretreatment after pretreatment are comprehensive useless
Water is driven into intermediate water reuse system, is handled into next step；
Waste water separation in S2, intermediate water reuse system: including two outlets in intermediate water reuse system, wherein 65% waste water
Discharge flows back into the pre-electroplating treatment cleaning process of electroplate factory from primary outlet, and the waste water of residue 35% is exported from second
In escape and enter and carry out further purified treatment in concentrated water collecting pit；
The precipitating filtering of S3, waste water: the waste water in concentrated water collecting pit enters in electric flocculation system after flocculation sedimentation, into
Enter and carry out further precipitation process in the multi-functional sedimentation basin of concentrated water, the waste water after precipitation process, which enters in concentrated water pH adjustment pond, to be adjusted
Save pH value=6~9；Concentrated water in concentrated water collecting pit is squeezed into flocculation sedimentation system by elevator pump, and flocculation sedimentation system passes through height
The mode of straightening stream pulse electrolysis removes heavy metal and COD in water, then enters back into the multi-functional sedimentation basin of concentrated water and carries out
Precipitation process, the filtrate in the multi-functional sedimentation basin of concentrated water enter in concentrated water pH conditioning tank after bottom of pond discharge, and concentrated water is multi-functional heavy
Silt layer in the pond of shallow lake is extracted out by filter press and is pressed into mud cake and transported；
The biodegrade of S4, waste water: the waste water after adjusting pH value, which enters in acidizing hydrolyzation tank, is hydrolyzed reaction, and hydrolysis is anti-
Waste water after answering be introduced into level-one biodegrade system degradation water in COD, ammonia and nitrogen organic, enter back into two stage biological degradation system
System is further degraded the COD not reacted completely also, ammonium oxidation object；In the biodegradation process of the waste water of S4,
Level-one biodegrade system includes the pond BAF-DN/C one and the pond BAF-DN/C two, the pond BAF-DN/C one and the pond BAF-DN/C two
The ammonia and nitrogen organic and COD being all made of in contact oxidation method degrading waste water, through level-one biodegrade system handle concentrated water into
Enter in two stage biological degeneration system, two stage biological degeneration system includes the pond BAF-C/N one and the pond BAF-C/N two, the pond BAF-C/N
The pond one and BAF-C/N two is all made of the ammonia and nitrogen organic and COD that biofilm is further degraded in water；
S5, clear water outlet: completing by biodegradable wastewater treatment, successively enters recoil pond and clear water reserviors are medium
Rear outlet up to standard to be detected.
In the present embodiment, the first conditioning tank of pH containing chromium includes preceding conditioning tank and rear conditioning tank, and the preceding conditioning tank receives
Processing waste water in broken chromium pond is precipitated, and the waste water after precipitation process pumped by second lift squeeze into rear conditioning tank into
The further precipitation process of row.
In the present embodiment, described containing the multi-functional sedimentation basin of chromium, nickeliferous multi-functional sedimentation basin and integrated multifunctional precipitating
Cross drainage and silt layer in pond are discharged from bottom of pond, and cross drainage and further adsorb heavy metal using silt layer as filter layer
Bottom of pond is excluded after ion again, silt layer is extracted out by filter press and is pressed into mud cake and transported.
In the present embodiment, in the broken chromium pond of S1, it is sulfurous acid that Cr VI, which is converted into the reducing agent that trivalent chromium uses,
Hydrogen sodium, the first pH containing chromium adjustment pond, the second pH containing chromium adjustment pond in S1, the first nickeliferous pH adjust pond, the second nickeliferous pH tune
The basifier used in whole pond, the first comprehensive adjustment pond pH and the second comprehensive pH adjustment pond is sodium hydroxide, in S1
The acidulant that acidizing hydrolyzation tank in acidification pool and S4 uses is sulfuric acid.
The redox reaction chemical formula carried out in broken chromium pond are as follows:
5H++Cr2O7 2-+3HSO3 -=3SO4 2-+2Cr3++4H2O or
7H++2CrO4 2-+3HSO3 -=3SO4 2-+2Cr3++5H2O；
PH containing chromium adjusts the precipitation reaction in pond are as follows:
Cr3++3OH-=Cr (OH)3↓
Precipitation reaction in nickeliferous pH adjustment pond are as follows:
Ni 2++2OH-=Ni(OH)2↓。
In the present embodiment, it in the pretreatment of the chromate waste water of S1, is offered pair into the inlet of the setting pot containing chromium
The equipment that total chrome content, content of 6-valence Cr ions are detected and analyzed automatically offers in the exit of chromium system ion exchange system
The equipment that total chrome content, content of 6-valence Cr ions are detected automatically, analyzed and alarmed；In the pretreatment of the nickel-containing waste water of S1,
The equipment that total nickel content is detected and analyzed automatically is offered into the inlet of nickeliferous setting pot, in nickel system ion exchange
The exit of system offers the equipment that total nickel content is detected automatically, analyzes and alarmed；In the process of S5 clear water outlet
In, automatic detection, the analysis detected respectively to indices is provided at recoil pond and clear water reserviors China and foreign countries outlet
And warning device.
Waste water treatment process of the invention is specifically applied to ×× metallo-plastic Co., Ltd and goes using such as Fig. 6-11 institute
Show, is that the said firm applies the obtained Environmental Monitoring Report text for the treatment of method in 2015, with continued reference to Figure 12-17, for this
Company's unused obtained Environmental Monitoring Report text for the treatment of method in 2013.Comprehensive Correlation 2015 environmental monitoring reports
It accuses and environment measuring in 2013 is reported, there is the table 2 of monitoring result to can be seen that total chromium, total nickel and total lead in 2013
Amount has exceeded, and testing result in 2015 and monitoring and evaluation are shown, all drainings all meet discharge standard.
Disclosed above is only several specific embodiments of the invention, but the present invention is not limited to this, any ability
What the technical staff in domain can think variation should all fall into protection scope of the present invention.
Claims (10)
1. a kind of waste water treatment process of electroplate factory, which is characterized in that comprise the following steps that:
It is mixed after S1, Wastewater Pretreatment
The pretreatment of chromate waste water: the chromate waste water recycled from electrodeposited chromium workshop initially enters brokenly chromium pond, the reduction in broken chromium pond
Under agent effect, Cr VI is converted into trivalent chromium；Waste water containing trivalent chromium enters the first pH containing chromium adjustment pond and adjusts pH value=7~8；
After pH value regulates, waste water, which enters to contain in the multi-functional sedimentation basin of chromium, is converted into sediment state for trivalent chromic ion, and will precipitating
The filtrate that overflow goes out afterwards is introduced into adjusting pH value=6~9 in the second conditioning tank of pH containing chromium；The chromate waste water of pH value was adjusted again
Into in chromium system ion exchange system, ion exchange is carried out through weak-acid cation-exchange resin, further removes free state chromium
Ion；
The pretreatment of nickel-containing waste water: the nickel-containing waste water recycled from electronickelling workshop is directly entered the first nickeliferous pH adjustment pond and adjusts pH
Value=10~11；After pH value regulates, waste water, which enters in nickeliferous multi-functional sedimentation basin, is converted into sediment state for nickel ion, and
The filtrate that overflow after precipitating goes out is introduced into adjusting pH value=6~9 in the second nickeliferous pH conditioning tank；Containing for pH value was adjusted again
Nickel waste water enters in nickel system ion exchange system, carries out ion exchange through weak-acid cation-exchange resin, further removal trip
Amorph nickel ion；
The pretreatment of pre-treatment comprehensive wastewater: the heavy metal wastewater thereby contained in addition to chromium, nickel recycled from pre-treatment workshop, spent acidic
Water and alkaline waste water are directly entered the first comprehensive pH adjustment pond and adjust pH value=6~9；After pH value regulates, waste water enters comprehensive
It closes in multi-functional sedimentation basin and various free state ions is converted into sediment state, and the filtrate that overflow after precipitating goes out is introduced into
PH value=6~9 are adjusted in second comprehensive pH conditioning tank；
Chromate waste water after pretreatment, nickel-containing waste water after pretreatment and pre-treatment comprehensive wastewater after pretreatment are equal
It is driven into intermediate water reuse system, is handled into next step；
Waste water separation in S2, intermediate water reuse system: including two outlets in intermediate water reuse system, wherein 65% waste water is from the
Discharge flows back into the pre-electroplating treatment cleaning process of electroplate factory in one outlet, and the waste water of residue 35% is arranged from second outlet
Carry out further purified treatment out and in entrance concentrated water collecting pit；
The precipitating filtering of S3, waste water: the waste water in concentrated water collecting pit enters in electric flocculation system after flocculation sedimentation, and entrance is dense
Further precipitation process is carried out in the multi-functional sedimentation basin of water, the waste water after precipitation process, which enters in concentrated water pH adjustment pond, adjusts pH
Value=6~9；
The biodegrade of S4, waste water: the waste water after adjusting pH value, which enters in acidizing hydrolyzation tank, is hydrolyzed reaction, after hydrolysis
Waste water be introduced into level-one biodegrade system degradation water in COD, ammonia and nitrogen organic, enter back into two stage biological degeneration system will
COD, the ammonium oxidation object not reacted completely also are further degraded；
S5, clear water outlet: completing by biodegradable wastewater treatment, successively enters recoil pond and clear water reserviors are medium to be checked
Survey rear outlet up to standard.
2. the waste water treatment process of electroplate factory according to claim 1, which is characterized in that in the Wastewater Pretreatment process of S1
In, the chromate waste water recycled from electroplating workshop sequentially enters progress chromium system waste water in setting pot containing chromium and chromate waste water conditioning tank
Concentration adjust, then by acidification pool progress waste water acidification after, into redox reaction is carried out in broken chromium pond, enter back into the
One pH containing chromium adjusts the pH value that chromate waste water is adjusted in pond；The nickel-containing waste water recycled from electroplating workshop sequentially enters nickeliferous setting pot
And the concentration adjusting of nickel system waste water is carried out in nickel-containing waste water conditioning tank, it is nickeliferous subsequently into being adjusted in the first nickeliferous pH adjustment pond
The pH value of waste water；Recycled from pre-treatment workshop containing heavy metal wastewater thereby in addition to chromium, nickel, acid waste water and alkaline waste water according to
It is secondary to enter the concentration adjusting that comprehensive wastewater is carried out in comprehensive setting pot and pre-treatment wastewater equalization pond, subsequently into comprehensive pH tune
The pH value of comprehensive wastewater is adjusted in whole pond.
3. the waste water treatment process of electroplate factory according to claim 2, which is characterized in that the first conditioning tank of pH containing chromium includes
Preceding conditioning tank and rear conditioning tank, the processing waste water that the preceding conditioning tank receives in broken chromium pond are precipitated, and will be after precipitation process
Waste water squeeze by second lift pump and carry out further precipitation process in rear conditioning tank.
4. the waste water treatment process of electroplate factory according to claim 2, which is characterized in that in the Wastewater Pretreatment process of S1
In, chromate waste water successively enters chromium system coagulating basin and chromium system helps solidifying pond by free state after the first pH containing chromium adjusts pond
Chromium is converted into sediment containing chromium, just enters later containing carrying out further precipitation process in the multi-functional sedimentation basin of chromium；Nickel-containing waste water
Behind the first nickeliferous pH adjustment pond, successively solidifying pond is helped to convert free state chromium into nickel system coagulating basin and nickel system nickeliferous
Sediment just enters in nickeliferous multi-functional sedimentation basin carry out further precipitation process later；Comprehensive wastewater is comprehensive by first
After closing pH adjustment pond, successively solidifying pond is helped to convert sediment for free state heavy metal into comprehensive coagulating basin and synthesis, later
Just enter in integrated multifunctional sedimentation basin and carries out further precipitation process.
5. the waste water treatment process of electroplate factory according to claim 4, which is characterized in that the multi-functional precipitating containing chromium
Cross drainage and silt layer in pond, nickeliferous multi-functional sedimentation basin and integrated multifunctional sedimentation basin are discharged from bottom of pond, and mistake
Drainage excludes bottom of pond again after further adsorbing heavy metal ion as filter layer using silt layer, silt layer is extracted out and pressed by filter press
It is transported at mud cake.
6. the waste water treatment process of electroplate factory according to claim 5, which is characterized in that in the Wastewater Pretreatment process of S1
In, chromate waste water further removes sediment into husky filter system after the second pH containing chromium adjusts pond, filtered to contain chromium
Waste water enters the ion exchange system of system containing chromium and removes chromium ion；Nickel-containing waste water is behind the second nickeliferous pH adjustment pond, into sand
Filter system further removes sediment, and filtered nickel-containing waste water enters nickeliferous system's ion exchange system and removes nickel ion.
7. the waste water treatment process of electroplate factory according to claim 6, which is characterized in that in the precipitating filtering of the waste water of S3
In the process, the concentrated water in concentrated water collecting pit is squeezed into flocculation sedimentation system by elevator pump, and flocculation sedimentation system passes through high voltage direct current
The mode of pulse electrolysis removes heavy metal and COD in water, then enters back into the multi-functional sedimentation basin of concentrated water and carries out place of settling
It manages, the filtrate in the multi-functional sedimentation basin of concentrated water enters in concentrated water pH conditioning tank after bottom of pond discharge, in the multi-functional sedimentation basin of concentrated water
Silt layer extracted out by filter press and be pressed into mud cake and transport.
8. the waste water treatment process of electroplate factory according to claim 7, which is characterized in that in the biodegrade of the waste water of S4
In the process, level-one biodegrade system includes the pond BAF-DN/C one and the pond BAF-DN/C two, the pond BAF-DN/C one and BAF-
The pond DN/C two is all made of ammonia and nitrogen organic and COD in contact oxidation method degrading waste water, handles through level-one biodegrade system
Concentrated water enter in two stage biological degeneration system, two stage biological degeneration system includes the pond BAF-C/N one and the pond BAF-C/N two,
The pond BAF-C/N one and the pond BAF-C/N two are all made of the ammonia and nitrogen organic and COD that biofilm is further degraded in water.
9. the waste water treatment process of electroplate factory according to claim 8, which is characterized in that in the broken chromium pond of S1, sexavalence
It is sodium hydrogensulfite that chromium, which is converted into the reducing agent that trivalent chromium uses, and the first pH containing chromium in S1 adjusts pond, the second pH containing chromium
It adjusts pond, the first nickeliferous pH adjustment pond, the second nickeliferous pH adjustment pond, the first comprehensive adjustment pond pH and the second comprehensive pH and adjusts pond
The middle basifier used is sodium hydroxide, and the acidulant that the acidizing hydrolyzation tank in acidification pool and S4 in S1 uses is
Sulfuric acid.
10. the waste water treatment process of electroplate factory according to claim 9, which is characterized in that S1 chromate waste water it is pre-
In processing, offers into the inlet of the setting pot containing chromium and total chrome content, content of 6-valence Cr ions are detected and analyzed automatically
Equipment, offered in the exit of chromium system ion exchange system total chrome content, content of 6-valence Cr ions are detected automatically, analyze and
The equipment of alarm；In the pretreatment of the nickel-containing waste water of S1, into the inlet of nickeliferous setting pot offer to total nickel content into
The automatic equipment detected and analyze of row, offers in the exit of nickel system ion exchange system and is examined automatically to total nickel content
It surveys, the equipment of analysis and alarm；During S5 clear water outlet, it is provided at recoil pond and clear water reserviors China and foreign countries outlet
Automatic detection, analysis and the warning device that indices are detected respectively.
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| CN106430816A (en) * | 2016-09-07 | 2017-02-22 | 南京工业大学 | Pretreatment process for deplating wastewater |
| CN106630250B (en) * | 2016-09-28 | 2023-03-10 | 江苏华兴电气科技有限公司 | Chromium waste water treatment integrated equipment |
| CN109761448A (en) * | 2019-03-12 | 2019-05-17 | 常熟风范电力设备股份有限公司 | A kind of processing method of steel member hot galvanizing waste water |
| CN110217949A (en) * | 2019-07-12 | 2019-09-10 | 深圳市臻鼎环保科技有限公司 | A kind of process for treating high ammonia nitrogen waste water |
| CN111960607A (en) * | 2020-07-03 | 2020-11-20 | 浙江清诚环境科技有限公司 | Treatment process of electroplating wastewater |
| CN113003800A (en) * | 2021-02-25 | 2021-06-22 | 上海金厦实业有限公司 | Wastewater quality-based treatment process |
| CN113371934A (en) * | 2021-06-08 | 2021-09-10 | 珠海市建泰环保工业园有限公司 | Sewage treatment method |
| CN113321388A (en) * | 2021-07-13 | 2021-08-31 | 珠海市建泰环保工业园有限公司 | Automatic PCB wastewater treatment equipment and method |
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| CN202688148U (en) * | 2012-06-19 | 2013-01-23 | 东莞市科达环保工程有限公司 | Electroplating wastewater treatment and recycling system |
| CN105271622A (en) * | 2015-11-25 | 2016-01-27 | 成都美富特膜科技有限公司 | Technique and system for zero discharging treatment of electroplating effluent |
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