CN110981118A - Electroplating wastewater split-flow treatment system for centralized control area - Google Patents

Electroplating wastewater split-flow treatment system for centralized control area Download PDF

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Publication number
CN110981118A
CN110981118A CN201911408181.0A CN201911408181A CN110981118A CN 110981118 A CN110981118 A CN 110981118A CN 201911408181 A CN201911408181 A CN 201911408181A CN 110981118 A CN110981118 A CN 110981118A
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tank
wastewater
chromium
sludge
nickel
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张金星
费西凯
郑超辉
吴健
郑志发
黄伟平
余小军
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China Qiyuan Engineering Design Research Institute Co ltd
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China Qiyuan Engineering Design Research Institute Co ltd
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Priority to CN202010290664.1A priority Critical patent/CN111285564A/en
Priority to CN202010290691.9A priority patent/CN111285565A/en
Priority to CN202010291458.2A priority patent/CN111285566A/en
Priority to CN202010291469.0A priority patent/CN111285567A/en
Priority to CN201911408181.0A priority patent/CN110981118A/en
Publication of CN110981118A publication Critical patent/CN110981118A/en
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
    • 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
    • C02F2001/007—Processes including a sedimentation step
    • 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
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C02F2101/18—Cyanides
    • 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
    • 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
    • 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
    • C02F2103/16—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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/007—Modular design
    • 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
    • C02F3/28—Anaerobic digestion processes
    • 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
    • C02F3/30—Aerobic and anaerobic processes

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

The invention relates to the field of wastewater treatment, in particular to a centralized control area electroplating wastewater split-flow treatment system, which is characterized in that: the electroplating wastewater of the electroplating plant area M is divided into 10 categories: the first type is chromium-containing electroplating wastewater, the second type is nickel-containing electroplating wastewater, the third type is zinc-containing comprehensive electroplating wastewater, the fourth type is acid copper electroplating wastewater, the fifth type is cyanogen-containing electroplating wastewater, the sixth type is pyrophosphate electroplating wastewater, the seventh type is oil-containing electroplating wastewater, the eighth type is ground electroplating wastewater, the ninth type is paint spraying and paint stripping wastewater, and the tenth type is aging liquid electroplating wastewater. The invention aims to provide a centralized control area electroplating wastewater shunting and dividing treatment system, which can accurately treat various electroplating wastewater.

Description

Electroplating wastewater split-flow treatment system for centralized control area
Technical Field
The invention relates to the field of wastewater treatment, in particular to a centralized control area electroplating wastewater split-flow treatment system.
Background
The yield of the waste water of the electroplating industry is less than that of the industries such as paper making, printing and dyeing, chemical engineering and the like, but the electroplating factories are widely distributed, and the types of harmful substances contained in the electroplating waste water are numerous, so that the treatment of the electroplating waste water is very important. The electroplating wastewater mainly contains heavy metal ions such as chromium, zinc, copper, lead, nickel and the like, and carcinogenic cyanide and the like. If the substances are directly discharged into the nature, on one hand, the substances cause great pollution to the environment and seriously threaten the life safety of animals and plants. On the other hand, the heavy metal ions in the electroplating wastewater can be recycled after being recovered, and the direct discharge can cause resource waste.
The treatment of the electroplating wastewater is carried out on one or two substances or the mixed treatment of all the substances. Aiming at a sewage treatment system for treating two kinds of electroplating wastewater, the system can not well deal with the condition of various sewage. All electroplating wastewater treatment systems are treated in the same way, and the treatment effect is not good because the pertinence is not strong.
Disclosure of Invention
In order to solve the problem that the conventional electroplating wastewater treatment cannot realize high-efficiency treatment of various types of wastewater, the invention aims to provide a centralized control area electroplating wastewater shunting and dividing treatment system, so that the system can accurately treat various types of electroplating wastewater.
The purpose of the invention is realized as follows: the utility model provides a centralized control district electroplating effluent reposition of redundant personnel divides treatment system, characterized by: the electroplating wastewater of the electroplating plant area M is divided into 10 categories: the first type is chromium-containing electroplating wastewater, the second type is nickel-containing electroplating wastewater, the third type is zinc-containing comprehensive electroplating wastewater, the fourth type is acid copper electroplating wastewater, the fifth type is cyanogen-containing electroplating wastewater, the sixth type is pyrophosphate electroplating wastewater, the seventh type is oil-containing electroplating wastewater, the eighth type is ground electroplating wastewater, the ninth type is paint spraying and paint stripping wastewater, and the tenth type is aging liquid electroplating wastewater; the electroplating wastewater treatment system comprises 10 types of electroplating wastewater, a chromium-containing electroplating wastewater treatment unit A, a nickel-containing electroplating wastewater treatment unit B, a zinc-containing wastewater treatment unit C, a copper-containing wastewater treatment unit D, a cyanogen-containing electroplating wastewater treatment unit E, a pyrophosphate electroplating wastewater treatment unit F, an oil-containing electroplating wastewater treatment unit G, a ground electroplating wastewater treatment unit H, a paint spraying and paint removing electroplating wastewater treatment unit I and an aging liquid electroplating wastewater treatment unit J, and at least comprises a valve control unit N which is used for switching the same process in the 10 treatment units so that the treatment units with the same process become backup treatment units.
The chromium-containing electroplating wastewater treatment unit A comprises: a chromium-containing wastewater adjusting tank (300), a chromium reduction reaction tank (301), a primary chromium coagulation reaction sedimentation tank (302) and a secondary chromium coagulation reaction sedimentation tank (303); the chromium-containing wastewater regulating tank (300), the chromium reduction reaction tank (301), the primary chromium coagulation reaction sedimentation tank (302) and the secondary chromium coagulation reaction sedimentation tank (303) are respectively connected in series in sequence, and are connected with chromium-containing electroplating wastewater at the inlet of the chromium-containing wastewater regulating tank (300) through a pipe fitting valve;
the primary chromium coagulation reaction sedimentation tank (302) is connected with a chromium-containing sludge concentration tank (304) through a pipe fitting valve, and the chromium-containing sludge concentration tank (304) is connected with a chromium-containing sludge concentration tank (305) and a chromium sludge chamber type filter press (306) in series in sequence; the clear water outlet of the chromium-containing sludge concentration tank (305) and the chromium sludge chamber type filter press (306) is connected with the inlet of the chromium-containing wastewater regulating tank (300) through a pipe fitting valve;
the two-stage chromium coagulation reaction sedimentation tank (303) is connected with a chromium-containing intermediate water tank (307) through a pipe valve, the chromium-containing intermediate water tank (307) is sequentially connected with a chromium quartz sand filter (308) and a chromium water outlet tank (309) in series, a clear water outlet of the chromium water outlet tank (309) is connected with the chromium quartz sand filter (308) through a pipeline and a pressure pump, the back washing of the chromium quartz sand filter (308) is realized, and the chromium quartz sand filter (308) is connected with an inlet of a chromium-containing wastewater adjusting tank (300) through a pipe valve;
the method for treating the chromium electroplating wastewater comprises the following steps: the chromium-containing wastewater enters a chromium-containing wastewater regulating tank (300) through a collecting pipeline, chromium-containing electroplating wastewater enters a chromium reduction reaction tank (301) through a pump, hexavalent chromium is reduced into trivalent chromium through a reduction reaction in the chromium reduction reaction tank (301), and effluent automatically flows into a primary chromium coagulation reaction sedimentation tank (302) through a chromium wastewater pipeline;
the primary chromium coagulation reaction sedimentation tank (302) controls the adding amount of NaOH and chromium to react with each other by a control valve to generate sediment, then large-particle sediment is formed in the primary chromium coagulation reaction sedimentation tank (302) under the action of a coagulant PAC and a flocculant PAM to be separated from wastewater, and the effluent automatically flows into the secondary chromium coagulation reaction sedimentation tank (303) through a chromium wastewater pipeline;
heavy metal trapping agents DTCR, coagulant PAC and flocculant PAM are added into a secondary chromium coagulation reaction sedimentation tank (303) through controlling a control valve to further reduce heavy metal in the wastewater, the effluent of the secondary chromium coagulation reaction sedimentation tank (303) automatically flows into a chromium-containing intermediate water tank (307), is lifted by a pump to enter a chromium quartz sand filter (308), is filtered by the chromium quartz sand filter (308), then enters a chromium effluent tank (309), and finally enters a mixed wastewater treatment unit;
sludge generated by the primary chromium coagulation reaction sedimentation tank (302) is discharged to a chromium-containing sludge tank (304) through gravity, then is lifted by a pump to enter a chromium-containing sludge concentration tank (305), the water content of the sludge is further reduced through gravity concentration, the volume of the sludge is reduced, the concentrated sludge is lifted by a screw pump to enter a chromium sludge box type filter press (306) for dehydration, and the dehydrated sludge cake is transported outside for disposal;
returning the supernatant of the chromium-containing sludge concentration tank (305), the chromium sludge box-type filter press (306) and the chromium quartz sand filter (308) to the system for continuous use; enabling the supernatant of the chromium water outlet pool (309) to enter a chromium quartz sand filter (308) for backwashing;
the chromium reduction reaction tank (301) is provided with hydrogen chloride and sodium bisulfite input interfaces, hexavalent chromium is reduced into trivalent chromium by controlling the input amount of the hydrogen chloride and the sodium bisulfite to perform reduction reaction with chromium wastewater in the chromium reduction reaction tank (301), and effluent automatically flows into the primary chromium coagulation reaction sedimentation tank (302) through a chromium wastewater pipeline;
the first-stage chromium coagulation reaction sedimentation tank (302) is provided with sodium hydroxide with a chemical formula of an interface of NaOH, a coagulant PAC and a flocculant PAM;
an interface of a heavy metal trapping agent DTCR, a coagulant PAC and a flocculant PAM is arranged in the secondary chromium coagulation reaction sedimentation tank (303).
The nickel-containing electroplating wastewater treatment unit B comprises: a nickel-containing wastewater adjusting tank (401), a primary nickel coagulation reaction sedimentation tank (402) and a secondary nickel coagulation reaction sedimentation tank (403); a nickel-containing wastewater regulating tank (401), a primary nickel coagulation reaction sedimentation tank (402) and a secondary nickel coagulation reaction sedimentation tank (403) are respectively connected in series in sequence, and are connected with nickel-containing electroplating wastewater at the inlet of the nickel-containing wastewater regulating tank (401) through a pipe fitting valve;
the primary nickel coagulation reaction sedimentation tank (402) is connected with a nickel-containing sludge tank (404) through a pipe fitting valve, and the nickel-containing sludge tank (404) is sequentially connected in series with a nickel-containing sludge concentration tank (405) and a nickel sludge chamber type filter press (406); the nickel-containing sludge concentration tank (405) and a clear water outlet of the nickel sludge box-type filter press (406) are connected with an inlet of a nickel-containing wastewater regulating tank (401) through a pipe fitting valve;
the secondary nickel coagulation reaction sedimentation tank (403) is connected with a nickel-containing intermediate water tank (407) through a pipe valve, the nickel-containing intermediate water tank (407) is sequentially connected with a nickel quartz sand filter (408) and a nickel water outlet tank (409) in series, a clear water outlet of the nickel water outlet tank (409) is connected with the nickel quartz sand filter (408) through a pipeline and a pressure pump, so that the nickel quartz sand filter (408) is backwashed, and the nickel quartz sand filter (408) is connected with an inlet of a nickel-containing wastewater adjusting tank (401) through a pipe valve;
the nickel electroplating wastewater treatment method comprises the following steps: nickel-containing wastewater enters a nickel-containing wastewater adjusting tank (401) through a collecting pipeline, and nickel-containing electroplating wastewater enters a primary nickel coagulation reaction sedimentation tank (402) through pump lifting;
the primary nickel coagulation reaction sedimentation tank (402) controls the adding amount of NaOH and nickel to react chemically through a control valve to generate sediment, then large-particle sediment is formed in the primary nickel coagulation reaction sedimentation tank (402) under the action of a coagulant PAC and a flocculant PAM to be separated from wastewater, and the effluent flows into a secondary nickel coagulation reaction sedimentation tank (403) through a nickel wastewater pipeline;
heavy metal trapping agent DTCR, coagulant PAC and flocculant PAM are added into a secondary nickel coagulation reaction sedimentation tank (403) through controlling a control valve to further reduce heavy metal in the wastewater, the effluent of the secondary nickel coagulation reaction sedimentation tank (403) automatically flows into a nickel-containing intermediate water tank (407), is lifted by a pump into a nickel quartz sand filter (408), is filtered by the nickel quartz sand filter (408), then enters a nickel effluent tank (409) and finally enters a mixed wastewater treatment unit;
sludge generated by the primary nickel coagulation reaction sedimentation tank (402) is discharged to a nickel-containing sludge tank (404) through gravity, then is lifted by a pump to enter a nickel-containing sludge concentration tank (405), the water content of the sludge is further reduced through gravity concentration, the volume of the sludge is reduced, the concentrated sludge is lifted by a screw pump to enter a nickel sludge box filter press (406) for dehydration, and the dehydrated sludge cake is transported outside for disposal;
supernatant of the nickel-containing sludge concentration tank (405), the nickel sludge box-type filter press (406) and the nickel quartz sand filter (408) returns to the system for continuous use; the supernatant of the nickel outlet pool (409) enters a nickel quartz sand filter (408) for backwashing;
the primary nickel coagulation reaction sedimentation tank (402) is provided with sodium hydroxide with a chemical formula of an interface of NaOH, a coagulant PAC and a flocculant PAM;
an interface of a heavy metal trapping agent DTCR, a coagulant PAC and a flocculant PAM is arranged in the secondary nickel coagulation reaction sedimentation tank (403).
The zinc-containing wastewater treatment unit C is used for treating zinc-containing and comprehensive wastewater:
the zinc-containing wastewater treatment unit C comprises: the system comprises a zinc-containing wastewater adjusting tank (501), a zinc coagulation reaction sedimentation tank (502), a zinc-containing sludge tank (503), a zinc-containing sludge concentration tank (504) and a box type filter press (505), wherein the zinc-containing wastewater adjusting tank (501), the zinc coagulation reaction sedimentation tank (502), the zinc-containing sludge tank (503), the zinc-containing sludge concentration tank (504) and the box type filter press (505) are sequentially connected in series through pipe valves, clear water outlets of the zinc-containing sludge concentration tank (504) and the box type filter press (505) are connected with an inlet of the zinc-containing wastewater adjusting tank (501), sludge of the box type filter press (505) enters a sludge treatment unit, and zinc-containing and comprehensive wastewater in the zinc coagulation reaction sedimentation tank (502) enters a mixed wastewater adjusting tank after being treated;
the zinc coagulation reaction sedimentation tank (502) is provided with sodium hydroxide, and the chemical formula is an interface of NaOH, a coagulant PAC and a flocculant PAM; the zinc coagulation reaction sedimentation tank (502) controls the adding amount of NaOH to chemically react with the zinc-containing and comprehensive wastewater through a control valve to generate sediment, then large-particle sediment is formed in the zinc coagulation reaction sedimentation tank (502) under the action of a coagulant PAC and a flocculant PAM to be separated from the wastewater, and water is discharged through a zinc-containing and comprehensive wastewater pipeline and enters a mixed wastewater adjusting tank;
sludge generated by the zinc coagulation reaction sedimentation tank (502) is discharged to a zinc-containing sludge tank (503) through gravity, then is lifted by a pump to enter a zinc-containing sludge concentration tank (504), the water content of the sludge is further reduced through gravity concentration, the volume of the sludge is reduced, the concentrated sludge is lifted by a screw pump to enter a box type filter press (505) for dehydration, and the dehydrated sludge cake is transported outside for disposal.
The copper-containing wastewater treatment unit D comprises: the device comprises a copper-containing wastewater adjusting tank (601), a copper coagulation reaction sedimentation tank (602), a copper-containing sludge tank (603), a copper-containing sludge concentration tank (604) and a box type filter press (605), wherein the copper-containing wastewater adjusting tank (601), the copper coagulation reaction sedimentation tank (602), the copper-containing sludge tank (603), the copper-containing sludge concentration tank (604) and the box type filter press (605) are sequentially connected in series through a pipe valve;
the copper coagulation reaction sedimentation tank (602) is provided with sodium hydroxide, and the chemical formula is an interface of NaOH, a coagulant PAC and a flocculant PAM; the copper coagulation reaction sedimentation tank (602) controls the addition of NaOH to chemically react with the copper-containing and comprehensive wastewater through a control valve to generate sediment, then large-particle sediment is formed in the copper coagulation reaction sedimentation tank (602) under the action of a coagulant PAC and a flocculant PAM to be separated from the wastewater, and water is discharged through a copper-containing and comprehensive wastewater pipeline and enters a mixed wastewater adjusting tank;
sludge generated by the copper coagulation reaction sedimentation tank (602) is discharged to a copper-containing sludge tank (603) through gravity, then is lifted by a pump to enter a copper-containing sludge concentration tank (604), the water content of the sludge is further reduced through gravity concentration, the volume of the sludge is reduced, the concentrated sludge is lifted by a screw pump to enter a box type filter press (605) for dehydration, and the dehydrated sludge cake is transported outside for disposal.
The cyanogen-containing electroplating wastewater treatment unit E at least comprises: the cyanide-containing wastewater adjusting tank (700), the primary cyanide breaking reaction tank (701) and the secondary cyanide breaking reaction tank (702), the cyanide-containing wastewater adjusting tank (700), the primary cyanide breaking reaction tank (701) and the secondary cyanide breaking reaction tank (702) are sequentially connected in series through pipeline valves, the primary cyanide breaking reaction tank (701) is provided with an interface for controlling NaOH and NaCl0, the amount of the NaOH and the NaCl0 entering the primary cyanide breaking reaction tank (701) is controlled through the interface for NaOH and NaCl0, stirrers are arranged in the primary cyanide breaking reaction tank (701) and the secondary cyanide breaking reaction tank (702), the primary cyanide breaking reaction tank (701) is provided with an interface for controlling NaOH and NaCl0, the NaOH and NaCl0 are controlled through the interface for NaOH and NaCl0, and the cyanide-containing electroplating wastewater and the NaOH and the NaCl0 are subjected to full chemical reaction through the stirrers; after being treated by the first-stage cyanogen breaking reaction tank (701), the wastewater enters the second-stage cyanogen breaking reaction tank (702) to continue the secondary treatment;
the second-stage cyanogen breaking reaction tank (702) is provided with control Cl0-Interface with NaCl0, through Cl0-Interface control with NaCl0 Cl0-And NaCl0, a stirrer is also arranged in the secondary cyanogen breaking reaction tank (702), the treated cyanogen in the primary cyanogen breaking reaction tank (701) enters the secondary cyanogen breaking reaction tank (702), and Cl0 is stirred by the stirrer-Chemically reacting with NaCl0 cyanide-containing wastewater, and automatically flowing into an acid copper wastewater adjusting tank through a secondary cyanide breaking reaction tank (702).
The pyrophosphate electroplating wastewater treatment unit F at least comprises: the system comprises a pyrophosphate wastewater regulating tank (800), a complex breaking reaction tank (801) and a pyrophosphate wastewater coagulation reaction sedimentation tank (802), wherein the complex breaking reaction tank (801) comprises a FeSO4 and a NaOH control interface, the FeSO4 and the NaOH interface are controlled to control the entering amount of FeSO4 and NaOH, a stirrer is arranged in the complex breaking reaction tank (801), and the stirrer stirs pyrophosphate electroplating wastewater, added FeSO4 and NaOH to carry out complex breaking reaction; the pyrophosphate waste water coagulation reaction sedimentation tank (802) comprises: PAC interface, PAM interface, copper-containing sludge pool interface; respectively controlling the addition of a coagulant and a flocculant through a PAC interface and a PAM interface;
when the device works, pyrophosphate wastewater enters a pyrophosphate wastewater adjusting tank (800) through a collecting pipeline, is lifted by a pump to enter a complex breaking reaction tank (801), treated effluent automatically flows into a pyrophosphate wastewater coagulation reaction sedimentation tank (802), the addition amount of FeSO4 and NaOH is controlled by a FeSO4 and NaOH control interface in the complex breaking reaction tank (801), a stirrer is arranged in the complex breaking reaction tank (801), FeSO4, NaOH and pyrophosphate wastewater are stirred to carry out chemical reaction, the separated effluent automatically flows into the pyrophosphate wastewater coagulation reaction sedimentation tank (802) to be continuously treated, a coagulant and a flocculant are added through a PAC interface and a PAM interface, and the sludge enters a copper-containing sludge tank after being treated by the pyrophosphate wastewater coagulation reaction sedimentation tank (802); the silver-containing electroplating wastewater is pre-filtered to remove solid impurities in the wastewater, and then enters a mixed wastewater adjusting tank through clear water.
The oily electroplating wastewater treatment unit G at least comprises: the device comprises an oily wastewater regulating tank (900), an oily sedimentation tank (901), an oily coagulation reaction sedimentation tank (902), an oily intermediate water tank (903), an oily wastewater A/O biological reaction tank (904), an oily wastewater secondary sedimentation tank (905), a discharged wastewater regulating tank (906) and an oily sludge tank (907), wherein the oily wastewater regulating tank (900), the oily sedimentation tank (901) and the oily coagulation reaction sedimentation tank (902) are sequentially connected in series with pipeline valves; the oily coagulation reaction sedimentation tank (902) is divided into two paths, one path is connected with an oily intermediate water tank (903), and the other path is connected with an oily sludge tank (907);
an oily wastewater A/O biological reaction tank (904), an oily wastewater secondary sedimentation tank (905) and a discharged wastewater adjusting tank (906) are sequentially connected in series by an oily intermediate water tank (903);
the oily wastewater secondary sedimentation tank (905) comprises a branch pipeline which is connected to an oily sludge tank (907) through a branch pipe;
the treatment process of the oily electroplating wastewater comprises the following steps: pretreatment oily waste water is connected to entering oily waste water equalizing basin (900) through collecting the pipeline, oily waste water equalizing basin (900) is connected with oily sedimentation tank (901) through pump and pipe fitting valve, oily sedimentation tank (901) includes a PAC interface, the volume of PAC interface control coagulant is passed through to oily sedimentation tank (901), the coagulant reacts with the mixture of oiliness, earlier through gravity deoiling in oily sedimentation tank (901), oil slick and suspended solid in the waste water are got rid of, the play water of deoiling gets into oily coagulation reaction sedimentation tank (902) again, oily coagulation reaction sedimentation tank (902) still includes at least: the device comprises an HCl interface, a PAC interface, a PAM interface, an oil-containing intermediate water tank interface and an oil-containing sludge tank interface, wherein NaOH, a coagulant and a flocculant are respectively controlled to be added through the HCl interface, the PAC interface and the PAM interface, and the device is connected with a pipeline of an oil-containing sludge tank (901) through the oil-containing sludge tank interface; is connected with a pipeline of an oily wastewater secondary sedimentation tank (905) through an oily intermediate water tank interface; the oily wastewater secondary sedimentation tank (905) is connected with an oily wastewater A/O biological reaction tank (904) through a pipe fitting valve, then is connected with the oily wastewater secondary sedimentation tank (905) through the oily wastewater A/O biological reaction tank (904), the oily wastewater after treatment is discharged into a discharged wastewater adjusting tank (906) through the oily wastewater secondary sedimentation tank (905), and the oily coagulation reaction sedimentation tank (902) and the oily wastewater secondary sedimentation tank (905) are connected with an oily sludge tank (907) through a three-way valve;
NaOH is added into an oil-containing coagulation reaction sedimentation tank (902) to adjust PH, large-particle sediment is formed and separated from wastewater under the action of a coagulant and a flocculant, effluent automatically flows into an oil-containing intermediate water tank (905) to be mixed with pretreated aging liquid, paint spraying wastewater and paint removing wastewater after pretreatment and then enters an oil-containing wastewater A/O biological reaction tank (904), organic matters in the wastewater are degraded through biological action, the effluent is subjected to solid-liquid separation through an oil-containing wastewater secondary sedimentation tank (905), and the effluent enters a discharge water treatment system for continuous treatment;
and discharging the sludge generated in the oil-containing coagulation reaction sedimentation tank and the secondary sedimentation tank to an oil-containing sludge tank.
The ground electroplating wastewater treatment unit H at least comprises: a ground wastewater adjusting tank (1000), a ground wastewater primary cyanogen breaking reaction tank (1001) and a ground wastewater secondary cyanogen breaking reactionPond (1002), ground waste water equalizing basin (1000), ground waste water one-level breaks cyanogen reaction tank (1001) and ground waste water second grade breaks cyanogen reaction tank (1002) and loops through the pipeline valve and concatenates, ground waste water one-level breaks cyanogen reaction tank (1001) has the interface of control NaOH and NaCl0, get into ground waste water one-level and break cyanogen reaction tank (1001) through interface control NaOH and NaCl0 of NaOH and NaCl0, there is the agitator in ground waste water one-level breaks cyanogen reaction tank (1001), ground waste water second grade breaks cyanogen reaction tank (1002) has control Cl0-Interface with NaCl0, through Cl0-Interface control with NaCl0 Cl0-And NaCl0, and a stirrer is also arranged in the ground wastewater secondary cyanogen-breaking reaction tank (1002);
the ground wastewater enters a ground wastewater adjusting tank (1000) through a collecting pipeline, is lifted by a pump to enter a ground wastewater first-stage cyanogen breaking reaction tank (1001), the treated effluent automatically flows into a ground wastewater second-stage cyanogen breaking reaction tank (1002), and NaOH, NaCl0 and Cl0 are respectively stirred by a stirrer-After the chemical reaction with the cyanide-containing wastewater by stirring with NaCl0, the effluent after the cyanide breaking reaction automatically flows into a ground wastewater chromium reduction reaction tank (1003), and the effluent after hexavalent chromium is reduced into trivalent chromium automatically flows into a zinc-containing and comprehensive wastewater adjusting tank for continuous treatment; automatically flows into a copper acid wastewater regulating tank through a ground wastewater chromium reduction reaction tank (1003).
The paint spraying and paint removing electroplating wastewater treatment unit I at least comprises: the device comprises a paint spraying and paint removing wastewater adjusting tank (1100), a paint spraying and paint removing wastewater pretreatment tank (1101), a paint spraying and paint removing wastewater coagulation reaction sedimentation tank (1102), an anaerobic reaction tank (1103), a paint spraying and paint removing wastewater adjusting tank (1100), a paint spraying and paint removing wastewater pretreatment tank (1101), a paint spraying and paint removing wastewater coagulation reaction sedimentation tank (1102) and an anaerobic reaction tank (1103) which are sequentially connected through a pipeline valve, wherein the paint spraying and paint removing wastewater pretreatment tank (1101) at least comprises a paint mist coagulant valve interface, a scum collecting tank interface and a water outlet, the input amount of a paint mist coagulant is controlled through the paint mist coagulant valve interface, so that paint in the paint spraying and paint removing wastewater is coagulated and floats upwards to form scum, and the scum is discharged to a scum collecting tank (1104) for transportation and disposal; go out water and promote the entering through the delivery port with the pump and spray paint and move back lacquer waste water coagulation reaction sedimentation tank (1102), spray paint and move back lacquer waste water coagulation reaction sedimentation tank (1102) still include at least: the device comprises an HCl interface, a PAC interface, a PAM interface, an oily sludge pool interface and an anaerobic reaction pool interface, wherein the HCl interface, the PAC interface and the PAM interface are used for respectively controlling the addition of NaOH, a coagulant and a flocculant, the oily sludge pool interface is connected with a pipeline of an oily sludge pool (1105), the anaerobic reaction pool interface is connected with a pipeline of an anaerobic reaction pool (1103), separated effluent enters the anaerobic reaction pool (1103), part of organic matters are degraded and the biodegradability of wastewater is improved under the action of anaerobic microorganisms, and the effluent of the anaerobic reaction pool (1103) enters an oily intermediate pool (1106) for continuous treatment; sludge produced by the system is discharged to an oil-containing sludge tank (1105).
The aging liquid electroplating wastewater treatment unit J comprises: the method comprises the steps of an aging liquid collecting tank 1201, an aging liquid coagulation reaction sedimentation tank 1202, an oily sludge tank 1203, an oily sludge concentration tank 1204, a chamber type filter press 1205, an ozone oxidation reaction tank 1206, a clean water outlet of the aging liquid collecting tank 1201, the aging liquid coagulation reaction sedimentation tank 1202, the oily sludge tank 1203, the oily sludge concentration tank 1204 and the chamber type filter press 1205 are sequentially connected in series through pipe fittings and valves, the oily sludge concentration tank 1204 and the clean water outlet of the chamber type filter press 1205 are connected with an inlet of the aging liquid collecting tank 1201, sludge of the chamber type filter press 1205 enters a sludge treatment unit, and treated aging liquid electroplating wastewater of the aging liquid coagulation reaction sedimentation tank 1202 is output to the ozone oxidation reaction tank 1206 through a pipeline.
The invention has the beneficial effects that: the invention can accurately divide various electroplating wastewater, so that the various electroplating wastewater can be accurately treated in place and is easy to manage, the same processes can be controlled by the valves to form backup, and the subsequent same processes are treated in a centralized way, so that the overall management is realized.
Drawings
The invention will be further described with reference to the following drawings and detailed description:
FIG. 1 is a schematic process diagram of example 1 of the present invention;
FIG. 2 is a schematic process diagram of example 2 of the present invention;
FIG. 3 is a flow chart of a chromium-containing electroplating wastewater treatment process;
FIG. 4 is a process flow diagram of nickel-containing electroplating wastewater;
FIG. 5 is a flow chart of a process for treating zinc-containing comprehensive electroplating wastewater;
FIG. 6 is a process flow diagram of acid copper electroplating wastewater;
FIG. 7 is a process flow diagram of cyanide-containing electroplating wastewater;
FIG. 8 is a process flow diagram of pyrophosphate electroplating wastewater;
FIG. 9 is a flow chart of a process for treating oily electroplating wastewater;
FIG. 10 is a process flow diagram of the ground electroplating wastewater;
FIG. 11 is a flow chart of a process for treating the paint-spraying and paint-stripping electroplating wastewater;
FIG. 12 is a flow chart of the treatment process of the aging liquid electroplating wastewater.
In the figure, A, a chromium-containing electroplating wastewater treatment unit; B. a nickel-containing electroplating wastewater treatment unit; C. a zinc-containing wastewater treatment unit; D. a copper-containing wastewater treatment unit; E. a cyanide-containing electroplating wastewater treatment unit; F. a pyrophosphate electroplating wastewater treatment unit; G. an oily electroplating wastewater treatment unit; H. a ground electroplating wastewater treatment unit; I. a paint spraying and paint removing electroplating wastewater treatment unit; J. an aging liquid electroplating wastewater treatment unit; m, a valve control unit; w, a comprehensive wastewater treatment unit;
300. a chromium wastewater adjusting tank; 301. a chromium reduction reaction tank; 302. a first-stage chromium coagulation reaction sedimentation tank; 303. a secondary chromium coagulation reaction sedimentation tank; 304. A chromium-containing sludge concentration tank; 305. a chromium-containing sludge concentration tank; 306. a chromium mud chamber type filter press; 307. a chromium-containing intermediate water tank; 308. a chromium quartz sand filter; 309. a chromium water outlet pool;
401. a nickel-containing wastewater adjusting tank; 402. a primary nickel coagulation reaction sedimentation tank; 403. a secondary nickel coagulation reaction sedimentation tank; 404. a nickel-containing sludge tank; 405. a nickel-containing sludge thickener; 406. a nickel mud chamber filter press; 407. a nickel-containing intermediate pool; 408. a nickel quartz sand filter; 409. a nickel effluent pool;
501. a zinc-containing wastewater adjusting tank; 502. a zinc coagulation reaction sedimentation tank; 503. a zinc-containing sludge pool; 504. a zinc-containing sludge concentration tank; 505. a chamber filter press;
601. a copper-containing wastewater adjusting tank; 602. a copper coagulation reaction sedimentation tank; 603. a copper-containing sludge tank; 604. a copper-containing sludge concentration tank; 605. a chamber filter press;
700. a cyanide-containing wastewater adjusting tank; 701. a first-stage cyanogen breaking reaction tank 702 and a second-stage cyanogen breaking reaction tank;
800. a pyrophosphate wastewater adjusting tank; 801. breaking the complex reaction tank; 802. a pyrophosphate wastewater coagulation reaction sedimentation tank;
900. an oily wastewater adjusting tank; 901. an oil-containing sedimentation tank; 902. an oil-containing coagulation reaction sedimentation tank; 903. an oil-containing intermediate water tank; 904. an oily wastewater A/O biological reaction tank; 905. a secondary sedimentation tank for oily wastewater; 906. a wastewater discharge regulating tank; 907. an oily sludge pool;
1000. a ground wastewater adjusting tank; 1001. a primary cyanide breaking reaction tank for ground wastewater; 1002. a ground waste water secondary cyanogen breaking reaction tank; 1003. a waste water chromium reduction reaction tank;
1100. a paint spraying and paint removing wastewater adjusting tank; 1101. a pretreatment tank for paint spraying and paint removing wastewater; 1102. a coagulation reaction sedimentation tank for paint spraying and paint removing wastewater; 1103. an anaerobic reaction tank; 1104. discharging the scum to a scum collecting tank; 1105. an oily sludge pool; 1106. an oil-containing intermediate water tank.
Detailed Description
Example 1
As shown in figure 1, the electroplating wastewater split-flow treatment system in the centralized control area is characterized in that: the electroplating wastewater of the electroplating plant area M is divided into 10 categories: the first type is chromium-containing electroplating wastewater, the second type is nickel-containing electroplating wastewater, the third type is zinc-containing comprehensive electroplating wastewater, the fourth type is acid copper electroplating wastewater, the fifth type is cyanogen-containing electroplating wastewater, the sixth type is pyrophosphate electroplating wastewater, the seventh type is oil-containing electroplating wastewater, the eighth type is ground electroplating wastewater, the ninth type is paint spraying and paint stripping wastewater, and the tenth type is aging liquid electroplating wastewater; the 10 types of electroplating wastewater are respectively connected with an electroplating wastewater treatment unit through a valve control unit N, wherein the electroplating wastewater treatment unit comprises a chromium-containing electroplating wastewater treatment unit A, a nickel-containing electroplating wastewater treatment unit B, a zinc-containing wastewater treatment unit C, a copper-containing wastewater treatment unit D, a cyanogen-containing electroplating wastewater treatment unit E, a pyrophosphate electroplating wastewater treatment unit F, an oil-containing electroplating wastewater treatment unit G, a ground electroplating wastewater treatment unit H, a paint spraying and paint removing electroplating wastewater treatment unit I, an aging liquid electroplating wastewater treatment unit J and the valve control unit N are used for switching the same process in the 10 treatment units, so that the treatment units with the same process are mutually backup treatment units.
The chromium-containing electroplating wastewater treatment unit A is used for treating chromium-containing electroplating wastewater:
as shown in FIG. 3, the chromium-containing electroplating wastewater treatment unit A comprises: a chromium-containing wastewater adjusting tank 300, a chromium reduction reaction tank 301, a primary chromium coagulation reaction sedimentation tank 302 and a secondary chromium coagulation reaction sedimentation tank 303; the chromium-containing wastewater regulating tank 300, the chromium reduction reaction tank 301, the primary chromium coagulation reaction sedimentation tank 302 and the secondary chromium coagulation reaction sedimentation tank 303 are respectively connected in series in sequence, and are connected with the chromium-containing electroplating wastewater at the inlet of the chromium-containing wastewater regulating tank 300 through a pipe fitting valve.
The first-stage chromium coagulation reaction sedimentation tank 302 is connected with a chromium-containing sludge concentration tank 304 through a pipe fitting valve, and the chromium-containing sludge concentration tank 304 is sequentially connected with a chromium-containing sludge concentration tank 305 and a chromium sludge chamber type filter press 306 in series; the clear water outlet of the chromium-containing sludge concentration tank 305 and the chromium sludge chamber filter press 306 are connected with the inlet of the chromium-containing wastewater adjusting tank 300 through pipe fittings and valves.
The second-stage chromium coagulation reaction sedimentation tank 303 is connected with a chromium-containing intermediate water tank 307 through a pipe valve, the chromium-containing intermediate water tank 307 is sequentially connected with a chromium quartz sand filter 308 and a chromium water outlet tank 309 in series, a clear water outlet of the chromium water outlet tank 309 is connected with the chromium quartz sand filter 308 through a pipeline and a pressure pump, the back washing of the chromium quartz sand filter 308 is realized, and the chromium quartz sand filter 308 is connected with an inlet of a chromium-containing wastewater adjusting tank 300 through a pipe valve.
The method for treating the chromium electroplating wastewater comprises the following steps: the chromium-containing wastewater enters a chromium-containing wastewater adjusting tank 300 through a collecting pipeline, the chromium-containing electroplating wastewater enters a chromium reduction reaction tank 301 through a pump, reduction reaction is carried out through the chromium reduction reaction tank 301 to reduce hexavalent chromium into trivalent chromium, and effluent automatically flows into a primary chromium coagulation reaction sedimentation tank 302 through a chromium wastewater pipeline.
The primary chromium coagulation reaction sedimentation tank 302 is controlled by a control valve to add NaOH, the added NaOH is chemically reacted with chromium to generate sediment, then under the action of a coagulant PAC and a flocculant PAM, large-particle sediment is formed in the primary chromium coagulation reaction sedimentation tank 302 and is separated from wastewater, and the effluent flows into a secondary chromium coagulation reaction sedimentation tank 303 automatically through a chromium wastewater pipeline.
Heavy metal trapping agent DTCR, coagulant PAC and flocculant PAM are added into the secondary chromium coagulation reaction sedimentation tank 303 through controlling a control valve to further reduce heavy metal in the wastewater, the effluent of the secondary chromium coagulation reaction sedimentation tank 303 automatically flows into a chromium-containing intermediate water tank 307, is lifted by a pump to enter a chromium quartz sand filter 308, is filtered by the chromium quartz sand filter 308, then enters a chromium water outlet tank 309, and finally enters a mixed wastewater treatment unit.
Sludge generated by the primary chromium coagulation reaction sedimentation tank 302 is discharged to a chromium-containing sludge tank 304 through gravity, and then is lifted by a pump to enter a chromium-containing sludge concentration tank 305, the water content of the sludge is further reduced through gravity concentration, the sludge volume is reduced, the concentrated sludge is lifted by a screw pump to enter a chromium sludge box-type filter press 306 for dehydration, and the dehydrated sludge cake is transported to be disposed.
And returning the supernatant of the chromium-containing sludge concentration tank 305, the chromium sludge box-type filter press 306 and the chromium quartz sand filter 308 to the system for continuous use. The supernatant of the chromium water outlet pool 309 enters a chromium quartz sand filter 308 for backwashing.
The chromium reduction reaction tank 301 is filled with hydrogen chloride (HCl) and sodium bisulfite (chemical formula: NaHSO)4) Input interface by controlling hydrogen chloride (HCl) and sodium bisulfate (chemical formula: NaHSO)4) The effluent enters a chromium reduction reaction tank 301 to carry out reduction reaction with chromium wastewater, hexavalent chromium is reduced to trivalent chromium, and the effluent automatically flows into a primary chromium coagulation reaction sedimentation tank 302 through a chromium wastewater pipeline.
The first-stage chromium coagulation reaction sedimentation tank 302 is provided with sodium hydroxide with a chemical formula of an interface of NaOH, a coagulant PAC and a flocculant PAM.
And a heavy metal trapping agent DTCR, a coagulant PAC and a flocculant PAM interface are arranged in the secondary chromium coagulation reaction sedimentation tank 303.
The nickel-containing electroplating wastewater treatment unit B is used for treating nickel-containing electroplating wastewater:
as shown in FIG. 4, the nickel-containing electroplating wastewater treatment unit B comprises: a nickel-containing wastewater adjusting tank 401, a primary nickel coagulation reaction sedimentation tank 402 and a secondary nickel coagulation reaction sedimentation tank 403; the nickel-containing wastewater adjusting tank 401, the primary nickel coagulation reaction sedimentation tank 402 and the secondary nickel coagulation reaction sedimentation tank 403 are respectively connected in series in sequence, and the nickel-containing electroplating wastewater at the inlet of the nickel-containing wastewater adjusting tank 400 is connected through a pipe fitting valve.
The primary nickel coagulation reaction sedimentation tank 402 is connected with a nickel-containing sludge tank 404 through a pipe fitting valve, and the nickel-containing sludge tank 404 is connected with a nickel-containing sludge concentration tank 405 and a nickel sludge chamber type filter press 406 in series in sequence; the nickel-containing sludge concentration tank 405 and the clean water outlet of the nickel-containing sludge chamber filter press 406 are connected with the inlet of the nickel-containing wastewater adjusting tank 400 through pipe valves.
The secondary nickel coagulation reaction sedimentation tank 403 is connected with a nickel-containing intermediate water tank 407 through a pipe fitting valve, the nickel-containing intermediate water tank 407 is sequentially connected with a nickel quartz sand filter 408 and a nickel water outlet tank 409 in series, a clear water outlet of the nickel water outlet tank 409 is connected with the nickel quartz sand filter 408 through a pipeline and a pressure pump, back washing of the nickel quartz sand filter 408 is realized, and the nickel quartz sand filter 408 is connected with an inlet of the nickel-containing wastewater regulating tank 400 through a pipe fitting valve.
The nickel electroplating wastewater treatment method comprises the following steps: the nickel-containing wastewater enters a nickel-containing wastewater adjusting tank 401 through a collecting pipeline, and the nickel-containing electroplating wastewater enters a primary nickel coagulation reaction sedimentation tank 402 through the lifting of a pump.
The primary nickel coagulation reaction sedimentation tank 402 is controlled by a control valve to add NaOH in an amount to react with nickel to generate sediment, then under the action of a coagulant PAC and a flocculant PAM, large-particle sediment is formed in the primary nickel coagulation reaction sedimentation tank 402 to be separated from wastewater, and the effluent flows into a secondary nickel coagulation reaction sedimentation tank 403 through a nickel wastewater pipeline.
Heavy metal trapping agent DTCR, coagulant PAC and flocculant PAM are added into a secondary nickel coagulation reaction sedimentation tank 403 through controlling a control valve to further reduce heavy metal in the wastewater, the effluent of the secondary nickel coagulation reaction sedimentation tank 403 automatically flows into a nickel-containing intermediate water tank 407, is lifted by a pump to enter a nickel quartz sand filter 408, is filtered by the nickel quartz sand filter 408, then enters a nickel effluent tank 409 and finally enters a mixed wastewater treatment unit.
Sludge generated by the primary nickel coagulation reaction sedimentation tank 402 is discharged to a nickel-containing sludge tank 404 through gravity, and then is lifted by a pump to enter a nickel-containing sludge concentration tank 405, the moisture content of the sludge is further reduced through gravity concentration, the sludge volume is reduced, the concentrated sludge is lifted by a screw pump to enter a nickel sludge chamber filter press 406 for dehydration, and the dehydrated sludge cake is transported to outside for disposal.
Supernatant liquid of the nickel-containing sludge concentration tank 405, the nickel sludge box-type filter press 406 and the nickel quartz sand filter 408 returns to the system for continuous use. The supernatant of the nickel outlet tank 409 enters a nickel quartz sand filter 408 for back washing.
The first-stage nickel coagulation reaction sedimentation tank 402 is provided with a sodium hydroxide interface with a chemical formula of NaOH, a coagulant PAC and a flocculant PAM.
The secondary nickel coagulation reaction sedimentation tank 403 is provided with interfaces of a heavy metal trapping agent DTCR, a coagulant PAC and a flocculant PAM.
The zinc-containing wastewater treatment unit C is used for treating zinc-containing and comprehensive wastewater:
as shown in fig. 5, the zinc-containing wastewater treatment unit C includes: the zinc-containing wastewater treatment system comprises a zinc-containing wastewater adjusting tank 501, a zinc coagulation reaction sedimentation tank 502, a zinc-containing sludge tank 503, a zinc-containing sludge concentration tank 504 and a chamber filter press 505, wherein the zinc-containing wastewater adjusting tank 501, the zinc coagulation reaction sedimentation tank 502, the zinc-containing sludge tank 503, the zinc-containing sludge concentration tank 504 and the chamber filter press 505 are sequentially connected in series through pipe valves, clear water outlets of the zinc-containing sludge concentration tank 504 and the chamber filter press 505 are connected with an inlet of the zinc-containing wastewater adjusting tank 501, sludge of the chamber filter press 505 enters a sludge treatment unit, and zinc-containing and comprehensive wastewater in the zinc coagulation reaction sedimentation tank 502 enters a mixed wastewater adjusting tank after being treated.
The zinc coagulation reaction sedimentation tank 502 is provided with sodium hydroxide, and the chemical formula is an interface of NaOH, a coagulant PAC and a flocculant PAM. The zinc coagulation reaction sedimentation tank 502 is controlled by a control valve to add NaOH, and the added NaOH reacts with the zinc-containing and comprehensive wastewater to generate sediment, then under the action of a coagulant PAC and a flocculating agent PAM, large-particle sediment is formed in the zinc coagulation reaction sedimentation tank 502 to be separated from the wastewater, and the water flows out of a zinc-containing and comprehensive wastewater pipeline and enters a mixed wastewater adjusting tank.
The sludge generated by the zinc coagulation reaction sedimentation tank 502 is discharged to a zinc-containing sludge tank 503 through gravity, and then is lifted by a pump to enter a zinc-containing sludge concentration tank 504, the water content of the sludge is further reduced through gravity concentration, the volume of the sludge is reduced, the concentrated sludge is lifted by a screw pump to enter a box filter press 505 for dehydration, and the dehydrated sludge cake is transported to the outside for disposal.
The copper-containing wastewater treatment unit D is used for treating copper-containing and comprehensive wastewater:
as shown in FIG. 6, the copper-containing wastewater treatment unit D comprises: the system comprises a copper-containing wastewater adjusting tank 601, a copper coagulation reaction sedimentation tank 602, a copper-containing sludge tank 603, a copper-containing sludge concentration tank 604 and a box type filter press 605, wherein the copper-containing wastewater adjusting tank 601, the copper coagulation reaction sedimentation tank 602, the copper-containing sludge tank 603, the copper-containing sludge concentration tank 604 and the box type filter press 605 are sequentially connected in series through pipe valves, clear water outlets of the copper-containing sludge concentration tank 604 and the box type filter press 605 are connected with an inlet of the copper-containing wastewater adjusting tank 601, sludge of the box type filter press 605 enters a sludge treatment unit, and copper-containing and comprehensive wastewater in the copper coagulation reaction sedimentation tank 602 enters a mixed wastewater adjusting tank after being treated.
The copper coagulation reaction sedimentation tank 602 is provided with sodium hydroxide, and the chemical formula is an interface of NaOH, a coagulant PAC and a flocculant PAM. The copper coagulation reaction sedimentation tank 602 is controlled by a control valve to add NaOH, and the added NaOH and the copper-containing and comprehensive wastewater are chemically reacted to generate sediment, then under the action of a coagulant PAC and a flocculant PAM, large-particle sediment is formed in the copper coagulation reaction sedimentation tank 602 and is separated from the wastewater, and the water discharged from a copper-containing and comprehensive wastewater pipeline enters a mixed wastewater adjusting tank.
Sludge generated by the copper coagulation reaction sedimentation tank 602 is discharged to the copper-containing sludge tank 603 through gravity, and then is lifted by a pump to enter the copper-containing sludge concentration tank 604, the water content of the sludge is further reduced through gravity concentration, the volume of the sludge is reduced, the concentrated sludge is lifted by a screw pump to enter a chamber filter press 606 for dehydration, and the dehydrated sludge cake is transported outside for disposal.
The cyanide-containing electroplating wastewater treatment method of the cyanide-containing electroplating wastewater treatment unit E comprises the following steps:
as shown in FIG. 7, the cyanide-containing electroplating wastewater treatment unit E at least comprises: the cyanide-containing wastewater adjusting tank 700, the primary cyanide breaking reaction tank 701 and the secondary cyanide breaking reaction tank 702 are connected in series sequentially through pipeline valves, the primary cyanide breaking reaction tank 701 is provided with an interface for controlling NaOH and NaCl0, the amount of the NaOH and the NaCl0 entering the primary cyanide breaking reaction tank 701 is controlled through the interface of NaOH and NaCl0, stirrers are arranged in the primary cyanide breaking reaction tank 701 and the secondary cyanide breaking reaction tank 702, the primary cyanide breaking reaction tank 701 is provided with an interface for controlling NaOH and NaCl0, the NaOH and NaCl0 enters through the interface of NaOH and NaCl0, and the cyanide-containing electroplating wastewater, the NaOH and the NaCl0 are subjected to full chemical reaction through the stirrers; after being treated by the first-stage cyanogen-breaking reaction tank 701, the wastewater enters the second-stage cyanogen-breaking reaction tank 702 to continue the secondary treatment.
The second-stage cyanogen breaking reaction tank 702 is provided with control Cl0-Interface with NaCl0, through Cl0-Interface control with NaCl0 Cl0-And NaCl0, a stirrer is also arranged in the secondary cyanogen breaking reaction tank 702, the treated cyanogen in the primary cyanogen breaking reaction tank 701 enters the secondary cyanogen breaking reaction tank 702, and Cl0 is stirred by the stirrer-Chemically reacting with NaCl0 cyanide-containing wastewater, and automatically flowing into a copper acid wastewater adjusting tank through a secondary cyanide breaking reaction tank 702.
The pyrophosphate electroplating wastewater treatment unit F is a pyrophosphate electroplating wastewater treatment method:
as shown in fig. 8, the pyrophosphate electroplating wastewater treatment unit F includes at least: a pyrophosphate wastewater adjusting tank 800, a complex breaking reaction tank 801 and a pyrophosphate wastewater coagulation reaction sedimentation tank 802, wherein the complex breaking reaction tank 801 comprises FeSO4 (FeSO 4)4) And a NaOH control interface, the FeSO4 and the NaOH are controlled by controlling the FeSO4 and the NaOH interface, a stirrer is arranged in the decomplexation reaction tank 801, and the stirrer stirs the pyrophosphate electroplating wastewater and the added FeSO4 and NaOH to carry out decomplexation reactionThe preparation method comprises the following steps of; the pyrophosphate wastewater coagulation reaction sedimentation tank 802 comprises: PAC interface, PAM interface, copper-containing sludge pool interface; and respectively controlling the addition of the coagulant and the flocculant through a PAC interface and a PAM interface.
During operation, pyrophosphate wastewater enters a pyrophosphate wastewater adjusting tank 800 through a collecting pipeline, is lifted by a pump to enter a complex breaking reaction tank 801, treated effluent automatically flows into a pyrophosphate wastewater coagulation reaction sedimentation tank 802, the addition amount of FeSO4 and NaOH is controlled by FeSO4 and NaOH control interfaces in the complex breaking reaction tank 801, a stirrer is arranged in the complex breaking reaction tank 801, FeSO4 is stirred, NaOH and pyrophosphate wastewater are subjected to chemical reaction, the separated effluent automatically flows into the pyrophosphate wastewater coagulation reaction sedimentation tank 802 for continuous treatment, a coagulant and a flocculant are added through a PAC interface and a PAM interface, the treated pyrophosphate wastewater is treated by the pyrophosphate wastewater coagulation reaction sedimentation tank 802, and sludge enters a copper-containing sludge tank. The silver-containing electroplating wastewater is pre-filtered to remove solid impurities in the wastewater, and then enters a mixed wastewater adjusting tank through clear water.
The oily electroplating wastewater treatment process of the oily electroplating wastewater treatment unit G is as follows:
as shown in fig. 9, the oily electroplating wastewater treatment unit G includes at least: the device comprises an oily wastewater regulating tank 900, an oily precipitation tank 901, an oily coagulation reaction precipitation tank 902, an oily intermediate water tank 903, an oily wastewater A/O biological reaction tank 904, an oily wastewater secondary precipitation tank 905, a discharged wastewater regulating tank 906 and an oily sludge tank 907, wherein the oily wastewater regulating tank 900, the oily precipitation tank 901 and the oily coagulation reaction precipitation tank 902 are sequentially connected in series with pipeline valves; the oily coagulation reaction sedimentation tank 902 is divided into two paths, one path is connected with an oily intermediate water tank 903, and the other path is connected with an oily sludge tank 907.
An oily wastewater A/O biological reaction tank 904, an oily wastewater secondary sedimentation tank 905 and a discharged wastewater adjusting tank 906 are sequentially connected in series by an oily intermediate water tank 903.
The oily wastewater secondary sedimentation tank 905 comprises a branch pipeline and is connected to an oily sludge tank 907 through a branch pipe.
The treatment process of the oily electroplating wastewater comprises the following steps: the pretreatment oily wastewater is connected to the oily wastewater adjusting tank 900 through a collecting pipeline, the oily wastewater adjusting tank 900 is connected with the oily sedimentation tank 901 through a pump and a pipe fitting valve, the oily sedimentation tank 901 comprises a PAC interface, the amount of the coagulant in the oily sedimentation tank 901 is controlled through the PAC interface, the coagulant is mixed with the oily water for reaction, the oily sedimentation tank 901 is internally deoiled through gravity, the floating oil and the suspended matters in the wastewater are removed, the effluent after deoiling enters the oily coagulation reaction sedimentation tank 902, and the oily coagulation reaction sedimentation tank 902 at least comprises: the system comprises an HCl interface, a PAC interface, a PAM interface, an oil-containing intermediate water tank interface and an oil-containing sludge tank interface, wherein NaOH, a coagulant and a flocculant are respectively controlled to be added through the HCl interface, the PAC interface and the PAM interface, and the system is connected with an oil-containing sludge tank 904 pipeline through the oil-containing sludge tank interface; the pipeline is connected with the oil-containing middle water tank 905 through an oil-containing middle water tank interface; the oily wastewater secondary sedimentation tank 905 is connected with an oily wastewater A/O biological reaction tank 904 through a pipe fitting valve, then is connected with the oily wastewater secondary sedimentation tank 905 through the oily wastewater A/O biological reaction tank 904, the oily wastewater after treatment is discharged into a discharged wastewater adjusting tank 906 through the oily wastewater secondary sedimentation tank 905, and the oily coagulation reaction sedimentation tank 902 and the oily wastewater secondary sedimentation tank 905 are connected with an oily sludge tank 907 through a three-way valve.
NaOH is added into an oil-containing coagulation reaction sedimentation tank 902 to adjust the PH value, large-particle sediment is formed and separated from the wastewater under the action of a coagulant and a flocculant, the effluent automatically flows into an oil-containing intermediate water tank 905 to be mixed with the pretreated aging liquid, the paint spraying wastewater and the paint removing wastewater after pretreatment, the mixture enters an oil-containing wastewater A/O biological reaction tank 904, the organic matters in the wastewater are degraded through biological action, the effluent is subjected to solid-liquid separation through an oil-containing wastewater secondary sedimentation tank 905, and the effluent enters a discharge water treatment system for continuous treatment.
And discharging the sludge generated in the oil-containing coagulation reaction sedimentation tank and the secondary sedimentation tank to an oil-containing sludge tank.
The method for treating the electroplating wastewater on the ground by the electroplating wastewater treatment unit H comprises the following steps:
as shown in fig. 10, the floor electroplating wastewater treatment unit H includes at least: a ground wastewater adjusting tank 1000, a ground wastewater primary cyanogen-breaking reaction tank 1001 and a ground wastewater secondary cyanogen-breaking reaction tank 1002, and the ground wastewater adjusting tank 1000 and the ground wastewater primary cyanogen-breaking reaction tank 1001 and a ground waste water secondary cyanogen-breaking reaction tank 1002 are connected in series through a pipeline valve in sequence, the ground waste water primary cyanogen-breaking reaction tank 1001 is provided with interfaces for controlling NaOH and NaCl0, the quantity of NaOH and NaCl0 entering the ground waste water primary cyanogen-breaking reaction tank 1001 is controlled through the interfaces of NaOH and NaCl0, a stirrer is arranged in the ground waste water primary cyanogen-breaking reaction tank 1001, and the ground waste water secondary cyanogen-breaking reaction tank 1002 is provided with a controller for controlling Cl0-Interface with NaCl0, through Cl0-Interface control with NaCl0 Cl0-And NaCl0, and a stirrer is also arranged in the ground wastewater secondary cyanogen breaking reaction tank 1002.
The ground wastewater enters a ground wastewater adjusting tank 1000 through a collecting pipeline, is lifted by a pump to enter a ground wastewater primary cyanogen breaking reaction tank 1001, the treated effluent automatically flows into a ground wastewater secondary cyanogen breaking reaction tank 1002, and NaOH, NaCl0 and Cl0 are respectively stirred by a stirrer-And NaCl0, stirring, chemically reacting with the cyanide-containing wastewater, allowing the effluent after cyanide breaking reaction to automatically flow into a ground wastewater chromium reduction reaction tank 1003, and allowing the effluent after hexavalent chromium is reduced into trivalent chromium to automatically flow into a zinc-containing and comprehensive wastewater adjusting tank for continuous treatment. And the wastewater enters a copper acid wastewater regulating tank through the ground wastewater chromium reduction reaction tank 1003 in a self-flowing manner.
The paint spraying and paint stripping electroplating wastewater treatment method of the paint spraying and paint stripping electroplating wastewater treatment unit I comprises the following steps:
as shown in fig. 11, the paint spraying and paint stripping electroplating wastewater treatment unit I at least comprises: the paint spraying and paint removing wastewater adjusting tank 1100, the paint spraying and paint removing wastewater pretreatment tank 1101, the paint spraying and paint removing wastewater coagulation reaction sedimentation tank 1102, the anaerobic reaction tank 1103, the paint spraying and paint removing wastewater adjusting tank 1100, the paint spraying and paint removing wastewater pretreatment tank 1101, the paint spraying and paint removing wastewater coagulation reaction sedimentation tank 1102, and the anaerobic reaction tank 1103 are connected sequentially through a pipeline valve, wherein the paint spraying and paint removing wastewater pretreatment tank 1101 at least further comprises a paint mist coagulant valve interface, a scum collecting tank interface and a water outlet, the input amount of the paint mist coagulant is controlled through the paint mist coagulant valve interface, so that paint in the paint spraying and paint removing wastewater coagulates and floats upwards to form scum, and the scum is discharged to the scum collecting tank 1104 to be transported and disposed outside. Will go out water and promote the entering through the delivery port and spray paint and move back lacquer waste water coagulation reaction sedimentation tank 1102 with the pump, spray paint and move back lacquer waste water coagulation reaction sedimentation tank 1102 still include at least: the HCl interface, the PAC interface, the PAM interface, oily sludge impoundment interface and anaerobic reaction pond interface, through the HCl interface, the PAC interface, the PAM interface controls NaOH respectively, coagulant and flocculating agent are added, be connected with oily sludge impoundment 1105 pipeline through oily sludge impoundment interface, be connected with anaerobic reaction pond 1103 pipeline through anaerobic reaction pond interface, play water after the separation gets into anaerobic reaction pond 1103, through anaerobic microorganisms's effect, degradation part organic matter improves the biodegradability of waste water simultaneously, anaerobic reaction pond 1103 goes out water and then gets into in the middle of the oily pond 1106 and continues to handle. Sludge produced by the system is discharged to an oily sludge basin 1105.
The aging liquid electroplating wastewater treatment unit J is used for carrying out an aging liquid electroplating wastewater treatment method:
as shown in FIG. 12, the aging liquid electroplating wastewater treatment unit J comprises: the method comprises the steps of an aging liquid collecting tank 1201, an aging liquid coagulation reaction sedimentation tank 1202, an oily sludge tank 1203, an oily sludge concentration tank 1204, a chamber type filter press 1205, an ozone oxidation reaction tank 1206, a clean water outlet of the aging liquid collecting tank 1201, the aging liquid coagulation reaction sedimentation tank 1202, the oily sludge tank 1203, the oily sludge concentration tank 1204 and the chamber type filter press 1205 are sequentially connected in series through pipe fittings and valves, the oily sludge concentration tank 1204 and the clean water outlet of the chamber type filter press 1205 are connected with an inlet of the aging liquid collecting tank 1201, sludge of the chamber type filter press 1205 enters a sludge treatment unit, and treated aging liquid electroplating wastewater of the aging liquid coagulation reaction sedimentation tank 1202 is output to the ozone oxidation reaction tank 1206 through a pipeline.
The aging liquid coagulation reaction sedimentation tank 1202 is provided with sodium hydroxide, and the chemical formula is an interface of NaOH, a coagulant PAC and a flocculant PAM.
The aging liquid coagulation reaction sedimentation tank 1202 is controlled by a control valve to add NaOH, the added NaOH is chemically reacted with the aging liquid electroplating wastewater to generate sediment, then under the action of a coagulant PAC and a flocculant PAM, large-particle sediment is formed in the aging liquid coagulation reaction sedimentation tank 1202 and is separated from the wastewater, sludge generated by the aging liquid coagulation reaction sedimentation tank 1202 is discharged to an oil-containing sludge tank 1203 through gravity, then the sludge is lifted by a pump to enter an oil-containing sludge concentration tank 1204, the water content of the sludge is further reduced through gravity concentration, the sludge volume is reduced, the concentrated sludge is lifted by a screw pump to enter a chamber filter press 1205 for dehydration, and the dehydrated sludge cake is transported and disposed.
The treated wastewater generated by the aging liquid coagulation reaction sedimentation tank 1202 is further sent to the ozone oxidation reaction tank 1206 for further treatment through a valve pipeline piece, and then sent to an oil-containing intermediate water tank after treatment.
Organic matters are degraded in the ozone oxidation reaction tank 1206 through the strong oxidation effect of ozone, macromolecular organic matters are destroyed and decomposed at the same time, micromolecular short-chain organic matters which are easy to biodegrade are formed, and effluent enters an oil-containing wastewater intermediate water tank 1207 for continuous treatment.
Example 2
As shown in FIG. 2, a centralized control area electroplating wastewater diversion treatment system is characterized in that: the electroplating wastewater of the electroplating plant area M is divided into 10 categories: the first type is chromium-containing electroplating wastewater, the second type is nickel-containing electroplating wastewater, the third type is zinc-containing comprehensive electroplating wastewater, the fourth type is acid copper electroplating wastewater, the fifth type is cyanogen-containing electroplating wastewater, the sixth type is pyrophosphate electroplating wastewater, the seventh type is oil-containing electroplating wastewater, the eighth type is ground electroplating wastewater, the ninth type is paint spraying and paint stripping wastewater, and the tenth type is aging liquid electroplating wastewater; the electroplating wastewater treatment system comprises 10 types of electroplating wastewater, a chromium-containing electroplating wastewater treatment unit A, a nickel-containing electroplating wastewater treatment unit B, a zinc-containing wastewater treatment unit C, a copper-containing wastewater treatment unit D, a cyanogen-containing electroplating wastewater treatment unit E, a pyrophosphate electroplating wastewater treatment unit F, an oil-containing electroplating wastewater treatment unit G, a ground electroplating wastewater treatment unit H, a paint spraying and paint removing electroplating wastewater treatment unit I and an aging liquid electroplating wastewater treatment unit J, and at least comprises a valve control unit N which is used for switching the same process in the 10 treatment units so that the treatment units with the same process become backup treatment units. The device comprises a chromium-containing electroplating wastewater treatment unit A, a nickel-containing electroplating wastewater treatment unit B, a zinc-containing wastewater treatment unit C, a copper-containing wastewater treatment unit D, a cyanogen-containing electroplating wastewater treatment unit E, a pyrophosphate electroplating wastewater treatment unit F, an oil-containing electroplating wastewater treatment unit G, a ground electroplating wastewater treatment unit H, a paint spraying and paint stripping electroplating wastewater treatment unit I and an aging liquid electroplating wastewater treatment unit J, wherein the aging liquid electroplating wastewater treatment units are respectively connected with a comprehensive wastewater treatment unit w through pipe fitting valve pipelines and are used for carrying out comprehensive treatment on 10 kinds of post-treatment with the same process, such as the outward transportation of dehydrated mud cakes or the dilution of high COD.
The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.

Claims (10)

1. The utility model provides a centralized control district electroplating effluent reposition of redundant personnel divides treatment system, characterized by: the electroplating wastewater of the electroplating plant area M is divided into 10 categories: the first type is chromium-containing electroplating wastewater, the second type is nickel-containing electroplating wastewater, the third type is zinc-containing comprehensive electroplating wastewater, the fourth type is acid copper electroplating wastewater, the fifth type is cyanogen-containing electroplating wastewater, the sixth type is pyrophosphate electroplating wastewater, the seventh type is oil-containing electroplating wastewater, the eighth type is ground electroplating wastewater, the ninth type is paint spraying and paint stripping wastewater, and the tenth type is aging liquid electroplating wastewater; the electroplating wastewater treatment system comprises 10 types of electroplating wastewater, a chromium-containing electroplating wastewater treatment unit A, a nickel-containing electroplating wastewater treatment unit B, a zinc-containing wastewater treatment unit C, a copper-containing wastewater treatment unit D, a cyanogen-containing electroplating wastewater treatment unit E, a pyrophosphate electroplating wastewater treatment unit F, an oil-containing electroplating wastewater treatment unit G, a ground electroplating wastewater treatment unit H, a paint spraying and paint removing electroplating wastewater treatment unit I and an aging liquid electroplating wastewater treatment unit J, and at least comprises a valve control unit N which is used for switching the same process in the 10 treatment units so that the treatment units with the same process become backup treatment units.
2. The system of claim 1, wherein the treatment system comprises: the chromium-containing electroplating wastewater treatment unit A comprises: a chromium-containing wastewater adjusting tank (300), a chromium reduction reaction tank (301), a primary chromium coagulation reaction sedimentation tank (302) and a secondary chromium coagulation reaction sedimentation tank (303); the chromium-containing wastewater regulating tank (300), the chromium reduction reaction tank (301), the primary chromium coagulation reaction sedimentation tank (302) and the secondary chromium coagulation reaction sedimentation tank (303) are respectively connected in series in sequence, and are connected with chromium-containing electroplating wastewater at the inlet of the chromium-containing wastewater regulating tank (300) through a pipe fitting valve;
the primary chromium coagulation reaction sedimentation tank (302) is connected with a chromium-containing sludge concentration tank (304) through a pipe fitting valve, and the chromium-containing sludge concentration tank (304) is connected with a chromium-containing sludge concentration tank (305) and a chromium sludge chamber type filter press (306) in series in sequence; the clear water outlet of the chromium-containing sludge concentration tank (305) and the chromium sludge chamber type filter press (306) is connected with the inlet of the chromium-containing wastewater regulating tank (300) through a pipe fitting valve;
the two-stage chromium coagulation reaction sedimentation tank (303) is connected with a chromium-containing intermediate water tank (307) through a pipe valve, the chromium-containing intermediate water tank (307) is sequentially connected with a chromium quartz sand filter (308) and a chromium water outlet tank (309) in series, a clear water outlet of the chromium water outlet tank (309) is connected with the chromium quartz sand filter (308) through a pipeline and a pressure pump, the back washing of the chromium quartz sand filter (308) is realized, and the chromium quartz sand filter (308) is connected with an inlet of a chromium-containing wastewater adjusting tank (300) through a pipe valve;
the method for treating the chromium electroplating wastewater comprises the following steps: the chromium-containing wastewater enters a chromium-containing wastewater regulating tank (300) through a collecting pipeline, chromium-containing electroplating wastewater enters a chromium reduction reaction tank (301) through a pump, hexavalent chromium is reduced into trivalent chromium through a reduction reaction in the chromium reduction reaction tank (301), and effluent automatically flows into a primary chromium coagulation reaction sedimentation tank (302) through a chromium wastewater pipeline;
the primary chromium coagulation reaction sedimentation tank (302) controls the adding amount of NaOH and chromium to react with each other by a control valve to generate sediment, then large-particle sediment is formed in the primary chromium coagulation reaction sedimentation tank (302) under the action of a coagulant PAC and a flocculant PAM to be separated from wastewater, and the effluent automatically flows into the secondary chromium coagulation reaction sedimentation tank (303) through a chromium wastewater pipeline;
heavy metal trapping agents DTCR, coagulant PAC and flocculant PAM are added into a secondary chromium coagulation reaction sedimentation tank (303) through controlling a control valve to further reduce heavy metal in the wastewater, the effluent of the secondary chromium coagulation reaction sedimentation tank (303) automatically flows into a chromium-containing intermediate water tank (307), is lifted by a pump to enter a chromium quartz sand filter (308), is filtered by the chromium quartz sand filter (308), then enters a chromium effluent tank (309), and finally enters a mixed wastewater treatment unit;
sludge generated by the primary chromium coagulation reaction sedimentation tank (302) is discharged to a chromium-containing sludge tank (304) through gravity, then is lifted by a pump to enter a chromium-containing sludge concentration tank (305), the water content of the sludge is further reduced through gravity concentration, the volume of the sludge is reduced, the concentrated sludge is lifted by a screw pump to enter a chromium sludge box type filter press (306) for dehydration, and the dehydrated sludge cake is transported outside for disposal;
returning the supernatant of the chromium-containing sludge concentration tank (305), the chromium sludge box-type filter press (306) and the chromium quartz sand filter (308) to the system for continuous use; enabling the supernatant of the chromium water outlet pool (309) to enter a chromium quartz sand filter (308) for backwashing;
the chromium reduction reaction tank (301) is provided with hydrogen chloride and sodium bisulfite input interfaces, hexavalent chromium is reduced into trivalent chromium by controlling the input amount of the hydrogen chloride and the sodium bisulfite to perform reduction reaction with chromium wastewater in the chromium reduction reaction tank (301), and effluent automatically flows into the primary chromium coagulation reaction sedimentation tank (302) through a chromium wastewater pipeline;
the first-stage chromium coagulation reaction sedimentation tank (302) is provided with sodium hydroxide with a chemical formula of an interface of NaOH, a coagulant PAC and a flocculant PAM;
an interface of a heavy metal trapping agent DTCR, a coagulant PAC and a flocculant PAM is arranged in the secondary chromium coagulation reaction sedimentation tank (303).
3. The system of claim 1, wherein the treatment system comprises: the nickel-containing electroplating wastewater treatment unit B comprises: a nickel-containing wastewater adjusting tank (401), a primary nickel coagulation reaction sedimentation tank (402) and a secondary nickel coagulation reaction sedimentation tank (403); a nickel-containing wastewater regulating tank (401), a primary nickel coagulation reaction sedimentation tank (402) and a secondary nickel coagulation reaction sedimentation tank (403) are respectively connected in series in sequence, and are connected with nickel-containing electroplating wastewater at the inlet of the nickel-containing wastewater regulating tank (401) through a pipe fitting valve;
the primary nickel coagulation reaction sedimentation tank (402) is connected with a nickel-containing sludge tank (404) through a pipe fitting valve, and the nickel-containing sludge tank (404) is sequentially connected in series with a nickel-containing sludge concentration tank (405) and a nickel sludge chamber type filter press (406); the nickel-containing sludge concentration tank (405) and a clear water outlet of the nickel sludge box-type filter press (406) are connected with an inlet of a nickel-containing wastewater regulating tank (401) through a pipe fitting valve;
the secondary nickel coagulation reaction sedimentation tank (403) is connected with a nickel-containing intermediate water tank (407) through a pipe valve, the nickel-containing intermediate water tank (407) is sequentially connected with a nickel quartz sand filter (408) and a nickel water outlet tank (409) in series, a clear water outlet of the nickel water outlet tank (409) is connected with the nickel quartz sand filter (408) through a pipeline and a pressure pump, so that the nickel quartz sand filter (408) is backwashed, and the nickel quartz sand filter (408) is connected with an inlet of a nickel-containing wastewater adjusting tank (401) through a pipe valve;
the nickel electroplating wastewater treatment method comprises the following steps: nickel-containing wastewater enters a nickel-containing wastewater adjusting tank (401) through a collecting pipeline, and nickel-containing electroplating wastewater enters a primary nickel coagulation reaction sedimentation tank (402) through pump lifting;
the primary nickel coagulation reaction sedimentation tank (402) controls the adding amount of NaOH and nickel to react chemically through a control valve to generate sediment, then large-particle sediment is formed in the primary nickel coagulation reaction sedimentation tank (402) under the action of a coagulant PAC and a flocculant PAM to be separated from wastewater, and the effluent flows into a secondary nickel coagulation reaction sedimentation tank (403) through a nickel wastewater pipeline;
heavy metal trapping agent DTCR, coagulant PAC and flocculant PAM are added into a secondary nickel coagulation reaction sedimentation tank (403) through controlling a control valve to further reduce heavy metal in the wastewater, the effluent of the secondary nickel coagulation reaction sedimentation tank (403) automatically flows into a nickel-containing intermediate water tank (407), is lifted by a pump into a nickel quartz sand filter (408), is filtered by the nickel quartz sand filter (408), then enters a nickel effluent tank (409) and finally enters a mixed wastewater treatment unit;
sludge generated by the primary nickel coagulation reaction sedimentation tank (402) is discharged to a nickel-containing sludge tank (404) through gravity, then is lifted by a pump to enter a nickel-containing sludge concentration tank (405), the water content of the sludge is further reduced through gravity concentration, the volume of the sludge is reduced, the concentrated sludge is lifted by a screw pump to enter a nickel sludge box filter press (406) for dehydration, and the dehydrated sludge cake is transported outside for disposal;
supernatant of the nickel-containing sludge concentration tank (405), the nickel sludge box-type filter press (406) and the nickel quartz sand filter (408) returns to the system for continuous use; the supernatant of the nickel outlet pool (409) enters a nickel quartz sand filter (408) for backwashing;
the primary nickel coagulation reaction sedimentation tank (402) is provided with sodium hydroxide with a chemical formula of an interface of NaOH, a coagulant PAC and a flocculant PAM;
an interface of a heavy metal trapping agent DTCR, a coagulant PAC and a flocculant PAM is arranged in the secondary nickel coagulation reaction sedimentation tank (403);
the zinc-containing wastewater treatment unit C is used for treating zinc-containing and comprehensive wastewater.
4. The system of claim 1, wherein the treatment system comprises: the zinc-containing wastewater treatment unit C comprises: the system comprises a zinc-containing wastewater adjusting tank (501), a zinc coagulation reaction sedimentation tank (502), a zinc-containing sludge tank (503), a zinc-containing sludge concentration tank (504) and a box type filter press (505), wherein the zinc-containing wastewater adjusting tank (501), the zinc coagulation reaction sedimentation tank (502), the zinc-containing sludge tank (503), the zinc-containing sludge concentration tank (504) and the box type filter press (505) are sequentially connected in series through pipe valves, clear water outlets of the zinc-containing sludge concentration tank (504) and the box type filter press (505) are connected with an inlet of the zinc-containing wastewater adjusting tank (501), sludge of the box type filter press (505) enters a sludge treatment unit, and zinc-containing and comprehensive wastewater in the zinc coagulation reaction sedimentation tank (502) enters a mixed wastewater adjusting tank after being treated;
the zinc coagulation reaction sedimentation tank (502) is provided with sodium hydroxide, and the chemical formula is an interface of NaOH, a coagulant PAC and a flocculant PAM; the zinc coagulation reaction sedimentation tank (502) controls the adding amount of NaOH to chemically react with the zinc-containing and comprehensive wastewater through a control valve to generate sediment, then large-particle sediment is formed in the zinc coagulation reaction sedimentation tank (502) under the action of a coagulant PAC and a flocculant PAM to be separated from the wastewater, and water is discharged through a zinc-containing and comprehensive wastewater pipeline and enters a mixed wastewater adjusting tank;
sludge generated by the zinc coagulation reaction sedimentation tank (502) is discharged to a zinc-containing sludge tank (503) through gravity, then is lifted by a pump to enter a zinc-containing sludge concentration tank (504), the water content of the sludge is further reduced through gravity concentration, the volume of the sludge is reduced, the concentrated sludge is lifted by a screw pump to enter a box type filter press (505) for dehydration, and the dehydrated sludge cake is transported outside for disposal.
5. The system of claim 1, wherein the treatment system comprises: the copper-containing wastewater treatment unit D comprises: the device comprises a copper-containing wastewater adjusting tank (601), a copper coagulation reaction sedimentation tank (602), a copper-containing sludge tank (603), a copper-containing sludge concentration tank (604) and a box type filter press (605), wherein the copper-containing wastewater adjusting tank (601), the copper coagulation reaction sedimentation tank (602), the copper-containing sludge tank (603), the copper-containing sludge concentration tank (604) and the box type filter press (605) are sequentially connected in series through a pipe valve;
the copper coagulation reaction sedimentation tank (602) is provided with sodium hydroxide, and the chemical formula is an interface of NaOH, a coagulant PAC and a flocculant PAM; the copper coagulation reaction sedimentation tank (602) controls the addition of NaOH to chemically react with the copper-containing and comprehensive wastewater through a control valve to generate sediment, then large-particle sediment is formed in the copper coagulation reaction sedimentation tank (602) under the action of a coagulant PAC and a flocculant PAM to be separated from the wastewater, and water is discharged through a copper-containing and comprehensive wastewater pipeline and enters a mixed wastewater adjusting tank;
sludge generated by the copper coagulation reaction sedimentation tank (602) is discharged to a copper-containing sludge tank (603) through gravity, then is lifted by a pump to enter a copper-containing sludge concentration tank (604), the water content of the sludge is further reduced through gravity concentration, the volume of the sludge is reduced, the concentrated sludge is lifted by a screw pump to enter a box type filter press (605) for dehydration, and the dehydrated sludge cake is transported outside for disposal.
6. The system of claim 1, wherein the treatment system comprises: the cyanogen-containing electroplating wastewater treatment unit E at least comprises: the cyanide-containing wastewater adjusting tank (700), the primary cyanide breaking reaction tank (701) and the secondary cyanide breaking reaction tank (702), the cyanide-containing wastewater adjusting tank (700), the primary cyanide breaking reaction tank (701) and the secondary cyanide breaking reaction tank (702) are sequentially connected in series through pipeline valves, the primary cyanide breaking reaction tank (701) is provided with an interface for controlling NaOH and NaCl0, the amount of the NaOH and the NaCl0 entering the primary cyanide breaking reaction tank (701) is controlled through the interface for NaOH and NaCl0, stirrers are arranged in the primary cyanide breaking reaction tank (701) and the secondary cyanide breaking reaction tank (702), the primary cyanide breaking reaction tank (701) is provided with an interface for controlling NaOH and NaCl0, the NaOH and NaCl0 are controlled through the interface for NaOH and NaCl0, and the cyanide-containing electroplating wastewater and the NaOH and the NaCl0 are subjected to full chemical reaction through the stirrers; after being treated by the first-stage cyanogen breaking reaction tank (701), the wastewater enters the second-stage cyanogen breaking reaction tank (702) to continue the secondary treatment;
the second-stage cyanogen breaking reaction tank (702) is provided with control Cl0-Interface with NaCl0, through Cl0-Interface control with NaCl0 Cl0-And NaCl0, a stirrer is also arranged in the secondary cyanogen breaking reaction tank (702), the treated cyanogen in the primary cyanogen breaking reaction tank (701) enters the secondary cyanogen breaking reaction tank (702), and Cl0 is stirred by the stirrer-Chemically reacting with NaCl0 cyanide-containing wastewater, and automatically flowing into an acid copper wastewater adjusting tank through a secondary cyanide breaking reaction tank (702).
7. The system of claim 1, wherein the treatment system comprises: the pyrophosphate electroplating wastewater treatment unit F at least comprises: the system comprises a pyrophosphate wastewater regulating tank (800), a complex breaking reaction tank (801) and a pyrophosphate wastewater coagulation reaction sedimentation tank (802), wherein the complex breaking reaction tank (801) comprises a FeSO4 and a NaOH control interface, the FeSO4 and the NaOH interface are controlled to control the entering amount of FeSO4 and NaOH, a stirrer is arranged in the complex breaking reaction tank (801), and the stirrer stirs pyrophosphate electroplating wastewater, added FeSO4 and NaOH to carry out complex breaking reaction; the pyrophosphate waste water coagulation reaction sedimentation tank (802) comprises: PAC interface, PAM interface, copper-containing sludge pool interface; respectively controlling the addition of a coagulant and a flocculant through a PAC interface and a PAM interface;
when the device works, pyrophosphate wastewater enters a pyrophosphate wastewater adjusting tank (800) through a collecting pipeline, is lifted by a pump to enter a complex breaking reaction tank (801), treated effluent automatically flows into a pyrophosphate wastewater coagulation reaction sedimentation tank (802), the addition amount of FeSO4 and NaOH is controlled by a FeSO4 and NaOH control interface in the complex breaking reaction tank (801), a stirrer is arranged in the complex breaking reaction tank (801), FeSO4, NaOH and pyrophosphate wastewater are stirred to carry out chemical reaction, the separated effluent automatically flows into the pyrophosphate wastewater coagulation reaction sedimentation tank (802) to be continuously treated, a coagulant and a flocculant are added through a PAC interface and a PAM interface, and the sludge enters a copper-containing sludge tank after being treated by the pyrophosphate wastewater coagulation reaction sedimentation tank (802); the silver-containing electroplating wastewater is pre-filtered to remove solid impurities in the wastewater, and then enters a mixed wastewater adjusting tank through clear water.
8. The system of claim 1, wherein the treatment system comprises: the oily electroplating wastewater treatment unit G at least comprises: the device comprises an oily wastewater regulating tank (900), an oily sedimentation tank (901), an oily coagulation reaction sedimentation tank (902), an oily intermediate water tank (903), an oily wastewater A/O biological reaction tank (904), an oily wastewater secondary sedimentation tank (905), a discharged wastewater regulating tank (906) and an oily sludge tank (907), wherein the oily wastewater regulating tank (900), the oily sedimentation tank (901) and the oily coagulation reaction sedimentation tank (902) are sequentially connected in series with pipeline valves; the oily coagulation reaction sedimentation tank (902) is divided into two paths, one path is connected with an oily intermediate water tank (903), and the other path is connected with an oily sludge tank (907);
an oily wastewater A/O biological reaction tank (904), an oily wastewater secondary sedimentation tank (905) and a discharged wastewater adjusting tank (906) are sequentially connected in series by an oily intermediate water tank (903);
the oily wastewater secondary sedimentation tank (905) comprises a branch pipeline which is connected to an oily sludge tank (907) through a branch pipe;
the treatment process of the oily electroplating wastewater comprises the following steps: pretreatment oily waste water is connected to entering oily waste water equalizing basin (900) through collecting the pipeline, oily waste water equalizing basin (900) is connected with oily sedimentation tank (901) through pump and pipe fitting valve, oily sedimentation tank (901) includes a PAC interface, the volume of PAC interface control coagulant is passed through to oily sedimentation tank (901), the coagulant reacts with the mixture of oiliness, earlier through gravity deoiling in oily sedimentation tank (901), oil slick and suspended solid in the waste water are got rid of, the play water of deoiling gets into oily coagulation reaction sedimentation tank (902) again, oily coagulation reaction sedimentation tank (902) still includes at least: the device comprises an HCl interface, a PAC interface, a PAM interface, an oil-containing intermediate water tank interface and an oil-containing sludge tank interface, wherein NaOH, a coagulant and a flocculant are respectively controlled to be added through the HCl interface, the PAC interface and the PAM interface, and the device is connected with a pipeline of an oil-containing sludge tank (901) through the oil-containing sludge tank interface; is connected with a pipeline of an oily wastewater secondary sedimentation tank (905) through an oily intermediate water tank interface; the oily wastewater secondary sedimentation tank (905) is connected with an oily wastewater A/O biological reaction tank (904) through a pipe fitting valve, then is connected with the oily wastewater secondary sedimentation tank (905) through the oily wastewater A/O biological reaction tank (904), the oily wastewater after treatment is discharged into a discharged wastewater adjusting tank (906) through the oily wastewater secondary sedimentation tank (905), and the oily coagulation reaction sedimentation tank (902) and the oily wastewater secondary sedimentation tank (905) are connected with an oily sludge tank (907) through a three-way valve;
NaOH is added into an oil-containing coagulation reaction sedimentation tank (902) to adjust PH, large-particle sediment is formed and separated from wastewater under the action of a coagulant and a flocculant, effluent automatically flows into an oil-containing intermediate water tank (905) to be mixed with pretreated aging liquid, paint spraying wastewater and paint removing wastewater after pretreatment and then enters an oil-containing wastewater A/O biological reaction tank (904), organic matters in the wastewater are degraded through biological action, the effluent is subjected to solid-liquid separation through an oil-containing wastewater secondary sedimentation tank (905), and the effluent enters a discharge water treatment system for continuous treatment;
and discharging the sludge generated in the oil-containing coagulation reaction sedimentation tank and the secondary sedimentation tank to an oil-containing sludge tank.
9. The system of claim 1, wherein the treatment system comprises: the ground electroplating wastewater treatment unit H at least comprises: the system comprises a ground wastewater adjusting tank (1000), a ground wastewater first-stage cyanogen breaking reaction tank (1001) and a ground wastewater second-stage cyanogen breaking reaction tank (1002), wherein the ground wastewater adjusting tank (1000), the ground wastewater first-stage cyanogen breaking reaction tank (1001) and the ground wastewater second-stage cyanogen breaking reaction tank (1002) are sequentially arrangedSerially connected through pipeline valves, the ground wastewater primary cyanogen-breaking reaction tank (1001) is provided with interfaces for controlling NaOH and NaCl0, the NaOH and the NaCl0 are controlled to enter the ground wastewater primary cyanogen-breaking reaction tank (1001) through the interfaces of the NaOH and the NaCl0, a stirrer is arranged in the ground wastewater primary cyanogen-breaking reaction tank (1001), and the ground wastewater secondary cyanogen-breaking reaction tank (1002) is provided with a controller for controlling Cl0-Interface with NaCl0, through Cl0-Interface control with NaCl0 Cl0-And NaCl0, and a stirrer is also arranged in the ground wastewater secondary cyanogen-breaking reaction tank (1002);
the ground wastewater enters a ground wastewater adjusting tank (1000) through a collecting pipeline, is lifted by a pump to enter a ground wastewater first-stage cyanogen breaking reaction tank (1001), the treated effluent automatically flows into a ground wastewater second-stage cyanogen breaking reaction tank (1002), and NaOH, NaCl0 and Cl0 are respectively stirred by a stirrer-After the chemical reaction with the cyanide-containing wastewater by stirring with NaCl0, the effluent after the cyanide breaking reaction automatically flows into a ground wastewater chromium reduction reaction tank (1003), and the effluent after hexavalent chromium is reduced into trivalent chromium automatically flows into a zinc-containing and comprehensive wastewater adjusting tank for continuous treatment; automatically flows into a copper acid wastewater regulating tank through a ground wastewater chromium reduction reaction tank (1003).
10. The system of claim 1, wherein the treatment system comprises: the paint spraying and paint removing electroplating wastewater treatment unit I at least comprises: the device comprises a paint spraying and paint removing wastewater adjusting tank (1100), a paint spraying and paint removing wastewater pretreatment tank (1101), a paint spraying and paint removing wastewater coagulation reaction sedimentation tank (1102), an anaerobic reaction tank (1103), a paint spraying and paint removing wastewater adjusting tank (1100), a paint spraying and paint removing wastewater pretreatment tank (1101), a paint spraying and paint removing wastewater coagulation reaction sedimentation tank (1102) and an anaerobic reaction tank (1103) which are sequentially connected through a pipeline valve, wherein the paint spraying and paint removing wastewater pretreatment tank (1101) at least comprises a paint mist coagulant valve interface, a scum collecting tank interface and a water outlet, the input amount of a paint mist coagulant is controlled through the paint mist coagulant valve interface, so that paint in the paint spraying and paint removing wastewater is coagulated and floats upwards to form scum, and the scum is discharged to a scum collecting tank (1104) for transportation and disposal; go out water and promote the entering through the delivery port with the pump and spray paint and move back lacquer waste water coagulation reaction sedimentation tank (1102), spray paint and move back lacquer waste water coagulation reaction sedimentation tank (1102) still include at least: the device comprises an HCl interface, a PAC interface, a PAM interface, an oily sludge pool interface and an anaerobic reaction pool interface, wherein the HCl interface, the PAC interface and the PAM interface are used for respectively controlling the addition of NaOH, a coagulant and a flocculant, the oily sludge pool interface is connected with a pipeline of an oily sludge pool (1105), the anaerobic reaction pool interface is connected with a pipeline of an anaerobic reaction pool (1103), separated effluent enters the anaerobic reaction pool (1103), part of organic matters are degraded and the biodegradability of wastewater is improved under the action of anaerobic microorganisms, and the effluent of the anaerobic reaction pool (1103) enters an oily intermediate pool (1106) for continuous treatment; sludge produced by the system is discharged to an oil-containing sludge tank (1105).
CN201911408181.0A 2019-12-31 2019-12-31 Electroplating wastewater split-flow treatment system for centralized control area Pending CN110981118A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN202010290664.1A CN111285564A (en) 2019-12-31 2019-12-31 Copper-containing electroplating wastewater treatment device and method
CN202010290691.9A CN111285565A (en) 2019-12-31 2019-12-31 Chromium-containing electroplating wastewater treatment device and method
CN202010291458.2A CN111285566A (en) 2019-12-31 2019-12-31 Method for treating oily electroplating wastewater
CN202010291469.0A CN111285567A (en) 2019-12-31 2019-12-31 Nickel-containing electroplating wastewater treatment device and method
CN201911408181.0A CN110981118A (en) 2019-12-31 2019-12-31 Electroplating wastewater split-flow treatment system for centralized control area

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911408181.0A CN110981118A (en) 2019-12-31 2019-12-31 Electroplating wastewater split-flow treatment system for centralized control area

Related Child Applications (4)

Application Number Title Priority Date Filing Date
CN202010290664.1A Division CN111285564A (en) 2019-12-31 2019-12-31 Copper-containing electroplating wastewater treatment device and method
CN202010291458.2A Division CN111285566A (en) 2019-12-31 2019-12-31 Method for treating oily electroplating wastewater
CN202010290691.9A Division CN111285565A (en) 2019-12-31 2019-12-31 Chromium-containing electroplating wastewater treatment device and method
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