CN110342680A - A kind of plumbic acid waste water treatment process - Google Patents

A kind of plumbic acid waste water treatment process Download PDF

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Publication number
CN110342680A
CN110342680A CN201910607643.5A CN201910607643A CN110342680A CN 110342680 A CN110342680 A CN 110342680A CN 201910607643 A CN201910607643 A CN 201910607643A CN 110342680 A CN110342680 A CN 110342680A
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waste water
heavy metal
level
water
waste
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段湘林
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Shanghai Shuinuo Environmental Protection Technology Co Ltd
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Shanghai Shuinuo Environmental Protection Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—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
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • 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
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • 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
    • 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
    • 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
    • C02F2101/20—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
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F7/00—Aeration of stretches of water

Abstract

The present invention discloses a kind of plumbic acid waste water treatment process, isolates metal sulfide precipitation object through precipitation concentration by the waste liquid in level-one concentrator；Further vulcanize heavy-metal ion removal by the waste liquid in second level vulcanization reaction tank and second level concentrator；Milk of lime is added and carries out neutralization reaction, the waste water of neutralization is discharged into heavy metal chelating device, through blast aeration, adds iron carbonyl, flocculant, fine to capture remaining heavy metal ion in waste water, it is flutterred by two-stage heavy metal after catching device reaction precipitating, obtains metal ion in removal waste water to the maximum extent；It is filtered using more medium filter, self-cleaning filtering and cartridge filter, multistage film process, is finally completed plumbic acid wastewater treatment and reuse.The heavy metal precipitation object amount that the processing method is separated is few, with high purity, can melt down melting, avoids generating dangerous waste.This method is easy to operate, low energy consumption, it is most important that this method does not generate the dangerous waste that need to transport outward disposition, and the sludge quantity generated is few, operating cost is low.

Description

A kind of plumbic acid waste water treatment process
Technical field
The present invention relates to technical field of waste water processing, and in particular to a kind of plumbic acid waste water treatment process.
Background technique
Present industrial wastewater treatment has become component part important in environmental protection, contains in many industrial wastewaters The heavy metal ion such as Hg, As, Cd, Pb, Cu, Zn, these heavy metal ion are mostly toxic, in addition to being harmful to the human body, to agricultural, water It produces and water environment all has a great impact.Relieving haperacidity process can also generate a large amount of waste acid, acid strong, containing poisonous and harmful heavy metallic from Sub- concentration is high.More waste water containing heavy metal ion is strongly acid wastewater, and traditional handicraft is using in milk of lime or lye and useless Heavy-metal ion removal is precipitated while sour, thus bring heavy metal precipitation object is mixed with acid-base neutralization sediment, It is difficult to separate, leading to all sediments generated is dangerous waste, as the more dangerous wastes of country dispose desired raising, processing cost It is significantly increased, there is an urgent need to the sediments for generating heavy metal precipitation object with general neutralization reaction to separate, heavy to heavy metal The dangerous waste that starch generates individually is disposed.Current widely used processing method containing heavy metal-polluted acid mainly has: the precipitation method, suction The methods of attached method and membrane filter method.Technique improper use, treatment effect are unstable；Sludge is more；Precipitability is poor；Heavy metal Element classification processing, multistage dosing；Dosage and control condition at different levels require stringenter；Inorganic ligand is easily and heavy metal ion Soluble stable comple is formed, the removal of heavy metal ion is influenced；Controlled by multistage dosing pH value precipitate it is different Heavy metal, therefore control more complex；Salinity is excessively high, and pole plate is easy breakdown；Inorganic ligand easily forms solubility with heavy metal ion Stable comple, influence the removal of heavy metal ion.
Summary of the invention
The purpose of the present invention is to provide a kind of plumbic acid waste water treatment process, to solve mentioned above in the background art ask Topic.To achieve the above object, the invention provides the following technical scheme: a kind of plumbic acid waste water treatment process, specifically includes following step It is rapid:
Acid waste water containing heavy metal is discharged into water treatment station acid waste water collecting pit from workshop by step 1, is promoted through pump Into level-one vulcanization reaction tank, Na is added in tank2S solution, Na2It is heavy that S reacts generation metal sulphide with the heavy metal ion in waste water Starch, the waste liquid after fully reacting flows into level-one concentrator, then the waste liquid flowed into level-one concentrator is separated through precipitation concentration Metal sulfide precipitation object out, supernatant flow into second level vulcanization reaction tank and second level concentrator；
Step 2, the waste liquid being located in second level vulcanization reaction tank and second level concentrator is further vulcanized go removing heavy metals from Son, the metal sulfide precipitation object settled through two-stage concentrator is discharged into heavy metal-polluted mud sump through pump, then metal sulfide precipitation object is given up Slag melts down melting after being dehydrated to 70% moisture content；
Lime slurry progress neutralization reaction is added in the supernatant obtained in step 2 by step 3, and the solution after reaction enters Sedimentation basin is separated by solid-liquid separation, and the waste residue of generation recycles after being dehydrated to 70% moisture content as gypsum, and supernatant flows into subsequent Heavy metal chelating reactor is further processed；
The waste water neutralized in step 3 is discharged into heavy metal chelating device by step 4, through blast aeration, adds iron carbonyl, flocculation Agent, it is fine to capture remaining heavy metal ion in waste water, flutterred by two-stage heavy metal after catching device reaction precipitating, in waste water metal from Son is eliminated to the maximum extent；
Step 5, by the waste water after precipitating reacted in step 4 after concentrator is compressed, flow into intermediate pool, produce Raw nonmetallic sediment is discharged into heavy metal-polluted mud sump through pump, mixes back after the metal sulfide precipitation object dehydration generated with step 2 Furnace melting；
Solution after diluting in step 5 is flowed into oil separator and flotation tank by step 6, removes organic pollutant in waste liquid And dross.
NaOH solution, Na2CO3 solution, PAC and PAM are added in treated in step 7, step 6 waste liquid, and to carry out reaction heavy It forms sediment, removes suspended contaminant and Ca in waste water2+、Mg2+Deng pretreatment as subsequent recycle-water filtration treatment；
Step 8, by treated in step 7, solution flows into PH readjustment pond, and sulfuric acid is added and carries out PH adjusting, after adjusting Solution be flowed into more medium filter, the effective suspended impurity that removes makes clarification of water；
Step 9 will produce water into subsequent UF filtering through more medium filter in step 8, and water is produced after UF filtering through pumping Enter in cartridge filter after promotion, the fine particles of 1 degree of turbidity of removal or more, as the subsequent pretreatment further filtered；
Step 10, solution cartridge filter in step 9 filtered is flowed into level-one RO and produces water after level-one RO produces water Chi Zhong；Level-one RO is produced into the solution in pond after secondary RO produces water, secondary RO is flowed into and produces in pond, finally by secondary RO The solution for producing pond flows into mixed bed, and the kind mineral salt in water is removed substantially, demineralized water is recycled.
Preferably, the metal precipitates generated under strong acidic environment in the step 3 and step 6 are entered to be discharged into through pump After heavy metal-polluted mud sump, compression dehydration is carried out by plate and frame filter press, treated, and pressing filtering liquid flows into acid waste water collection Chi Zhong, filter-press residues are transported to meltshop.
Preferably, agent is caught containing heavy metal paving in the heavy metal chelating device, it is a kind of organic high score that heavy metal paving, which catches agent, Sub- water-purifying material accelerates the precipitation and separation of metal ion, avoids metal dedicated for the metal ion in absorption strongly acid wastewater Ion enters subsequent neutralization precipitation sludge, generates dangerous waste, to avoid generating the dangerous waste disposition expense of wholesale.
Preferably, the UF filtering and cartridge filter filtering constitute multi-ultrafiltration, the multi-ultrafiltration as film filtering, are The membrane process separated using the sieving actoion of film.
Technical effect and advantage of the invention: this technique is removed in waste water in strong acidic environment using sulphide precipitation Each heavy metal ion, then heavy metal ions in wastewater is accurately removed using hydroxyl iron process, make heavy metal precipitation object and neutralize to sink Starch separates, and the heavy metal precipitation object amount separated is few, with high purity, can melt down melting, or individually dispose as dangerous waste, in It can be used as gypsum with sediment to recycle, reduce the yield of dangerous waste to greatest extent, reduce processing disposal of solid waste Cost.This method is easy to operate, occupied area is small, low energy consumption, it is most important that and this method does not generate the dangerous waste that need to transport outward disposition, And the sludge quantity generated is fewer than other methods.
Detailed description of the invention
Fig. 1 is processing technological flow figure of the invention.
Specific embodiment
Embodiment 1
A kind of plumbic acid waste water treatment process as shown in Figure 1, specifically includes the following steps:
Acid waste water containing heavy metal is discharged into water treatment station acid waste water collecting pit from workshop by step 1, is promoted through pump Into level-one vulcanization reaction tank, Na is added in tank2S solution, Na2It is heavy that S reacts generation metal sulphide with the heavy metal ion in waste water Starch, the waste liquid after fully reacting flows into level-one concentrator, then the waste liquid flowed into level-one concentrator is separated through precipitation concentration Metal sulfide precipitation object out, supernatant flow into second level vulcanization reaction tank and second level concentrator；
Step 2, the waste liquid being located in second level vulcanization reaction tank and second level concentrator is further vulcanized go removing heavy metals from Son, the metal sulfide precipitation object settled through two-stage concentrator is discharged into heavy metal-polluted mud sump through pump, then metal sulfide precipitation object is given up Slag melts down melting after being dehydrated to 70% moisture content；
Lime slurry progress neutralization reaction is added in the supernatant obtained in step 2 by step 3, and the solution after reaction enters Sedimentation basin is separated by solid-liquid separation, and the waste residue of generation recycles after being dehydrated to 70% moisture content as gypsum, and supernatant flows into subsequent Heavy metal chelating reactor is further processed；
The waste water neutralized in step 3 is discharged into heavy metal chelating device by step 4, through blast aeration, adds iron carbonyl, flocculation Agent, it is fine to capture remaining heavy metal ion in waste water, flutterred by two-stage heavy metal after catching device reaction precipitating, in waste water metal from Son is eliminated to the maximum extent；
Step 5, by the waste water after precipitating reacted in step 4 after concentrator is compressed, flow into intermediate pool, produce Raw nonmetallic sediment is discharged into heavy metal-polluted mud sump through pump, mixes back after the metal sulfide precipitation object dehydration generated with step 2 Furnace melting；
Solution after diluting in step 5 is flowed into oil separator and flotation tank by step 6, removes organic pollutant in waste liquid And dross.
NaOH solution, Na2CO3 solution, PAC and PAM are added in treated in step 7, step 6 waste liquid, and to carry out reaction heavy It forms sediment, removes suspended contaminant and Ca in waste water2+、Mg2+Deng pretreatment as subsequent recycle-water filtration treatment；
Step 8, by treated in step 7, solution flows into PH readjustment pond, and sulfuric acid is added and carries out PH adjusting, after adjusting Solution be flowed into more medium filter, the effective suspended impurity that removes makes clarification of water；
Step 9 will produce water into subsequent UF filtering through more medium filter in step 8, and water is produced after UF filtering through pumping Enter in cartridge filter after promotion, the fine particles of 1 degree of turbidity of removal or more, as the subsequent pretreatment further filtered；
Step 10, solution cartridge filter in step 9 filtered is flowed into level-one RO and produces water after level-one RO produces water Chi Zhong；Level-one RO is produced into the solution in pond after secondary RO produces water, secondary RO is flowed into and produces in pond, finally by secondary RO The solution for producing pond flows into mixed bed, and the kind mineral salt in water is removed substantially, demineralized water is recycled.
Embodiment 2
A kind of plumbic acid waste water treatment process as shown in Figure 1, specifically includes the following steps:
Acid waste water containing heavy metal is discharged into water treatment station acid waste water collecting pit from workshop by step 1, is promoted through pump Into level-one vulcanization reaction tank, Na is added in tank2S solution, Na2It is heavy that S reacts generation metal sulphide with the heavy metal ion in waste water Starch, the waste liquid after fully reacting flows into level-one concentrator, then the waste liquid flowed into level-one concentrator is separated through precipitation concentration Metal sulfide precipitation object out, supernatant flow into second level vulcanization reaction tank and second level concentrator；
Step 2, the waste liquid being located in second level vulcanization reaction tank and second level concentrator is further vulcanized go removing heavy metals from Son, the metal sulfide precipitation object settled through two-stage concentrator is discharged into heavy metal-polluted mud sump through pump, then metal sulfide precipitation object is given up Slag melts down melting after being dehydrated to 70% moisture content；
Lime slurry progress neutralization reaction is added in the supernatant obtained in step 2 by step 3, and the solution after reaction enters Sedimentation basin is separated by solid-liquid separation, and the waste residue of generation recycles after being dehydrated to 70% moisture content as gypsum, and supernatant flows into subsequent Heavy metal chelating reactor is further processed；
The waste water neutralized in step 3 is discharged into heavy metal chelating device by step 4, through blast aeration, adds iron carbonyl, flocculation Agent, it is fine to capture remaining heavy metal ion in waste water, flutterred by two-stage heavy metal after catching device reaction precipitating, in waste water metal from Son is eliminated to the maximum extent；
Step 5, by the waste water after precipitating reacted in step 4 after concentrator is compressed, flow into intermediate pool, produce Raw nonmetallic sediment is discharged into heavy metal-polluted mud sump through pump, mixes back after the metal sulfide precipitation object dehydration generated with step 2 Furnace melting；
Solution after diluting in step 5 is flowed into oil separator and flotation tank by step 6, removes organic pollutant in waste liquid And dross.
NaOH solution, Na2CO3 solution, PAC and PAM are added in treated in step 7, step 6 waste liquid, and to carry out reaction heavy It forms sediment, removes suspended contaminant and Ca in waste water2+、Mg2+Deng pretreatment as subsequent recycle-water filtration treatment；
Step 8, by treated in step 7, solution flows into PH readjustment pond, and sulfuric acid is added and carries out PH adjusting, after adjusting Solution be flowed into more medium filter, the effective suspended impurity that removes makes clarification of water；
Step 9 will produce water into subsequent UF filtering through more medium filter in step 8, and water is produced after UF filtering through pumping Enter in cartridge filter after promotion, the fine particles of 1 degree of turbidity of removal or more, as the subsequent pretreatment further filtered；
Step 10, solution cartridge filter in step 9 filtered is flowed into level-one RO and produces water after level-one RO produces water Chi Zhong；Level-one RO is produced into the solution in pond after secondary RO produces water, secondary RO is flowed into and produces in pond, finally by secondary RO The solution for producing pond flows into mixed bed, and the kind mineral salt in water is removed substantially, demineralized water is recycled.
Preferably, the metal precipitates generated under strong acidic environment in the step 3 and step 6 are entered to be discharged into through pump After heavy metal-polluted mud sump, compression dehydration is carried out by plate and frame filter press, treated, and pressing filtering liquid flows into acid waste water collection Chi Zhong, filter-press residues are transported to meltshop.
Preferably, agent is caught containing heavy metal paving in the heavy metal chelating device, it is a kind of organic high score that heavy metal paving, which catches agent, Sub- water-purifying material accelerates the precipitation and separation of metal ion, avoids metal dedicated for the metal ion in absorption strongly acid wastewater Ion enters subsequent neutralization precipitation sludge, generates dangerous waste, to avoid generating the dangerous waste disposition expense of wholesale.
Preferably, the UF filtering and cartridge filter filtering constitute multi-ultrafiltration, the multi-ultrafiltration as film filtering, are The membrane process separated using the sieving actoion of film.
Present invention process process and advantage are as follows: this technique using sulphide precipitation tentatively remove in waste water each heavy metal from Son, then heavy metal ions in wastewater is accurately removed using hydroxyl iron process, utmostly precipitation and separation heavy metal ions in wastewater, It is set not enter subsequent processing process as far as possible, with separating beavy metal sediment and heavy metal complex precipitate.The weight separated Precipitated metal object amount is few, with high purity, can melt down melting, avoids generating dangerous waste.This method is easy to operate, occupied area is small, energy consumption It is low, it is most important that this method does not generate the dangerous waste that need to transport outward disposition, and the sludge quantity generated is fewer than other methods.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention, Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features, All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention Within protection scope.

Claims (4)

1. a kind of plumbic acid waste water treatment process, it is characterised in that: following steps are specifically included,
Acid waste water containing heavy metal is discharged into water treatment station acid waste water collecting pit from workshop by step 1, is lifted into through pump Level-one vulcanization reaction tank adds Na in tank2S solution, Na2S is reacted with the heavy metal ion in waste water generates metal sulphide precipitating Object, the waste liquid after fully reacting flows into level-one concentrator, then the waste liquid flowed into level-one concentrator is isolated through precipitation concentration Metal sulfide precipitation object, supernatant flow into second level vulcanization reaction tank and second level concentrator；
The waste liquid being located in second level vulcanization reaction tank and second level concentrator is further vulcanized heavy-metal ion removal by step 2, is passed through The metal sulfide precipitation object of two-stage concentrator sedimentation is discharged into heavy metal-polluted mud sump through pump, then metal sulfide precipitation object waste residue is dehydrated Melting is melted down after to 70% moisture content；
Lime slurry progress neutralization reaction is added in the supernatant obtained in step 2 by step 3, and the solution after reaction enters precipitating Pond is separated by solid-liquid separation, and the waste residue of generation recycles after being dehydrated to 70% moisture content as gypsum, and supernatant flows into a subsequent huge sum of money Belong to catching reaction device to be further processed；
The waste water neutralized in step 3 is discharged into heavy metal chelating device by step 4, through blast aeration, adds iron carbonyl, flocculant, essence It is thin to capture remaining heavy metal ion in waste water, it is flutterred by two-stage heavy metal after catching device reaction precipitating, metal ion is most in waste water Eliminated to limits；
Step 5, by the waste water after precipitating reacted in step 4 after concentrator is compressed, flow into intermediate pool, generation Nonmetallic sediment through pump be discharged into heavy metal-polluted mud sump, with step 2 generate metal sulfide precipitation object dehydration after mix melt down it is molten Refining；
Solution after diluting in step 5 is flowed into oil separator and flotation tank by step 6, is removed organic pollutant in waste liquid and is floated Slag.
NaOH solution, Na2CO3 solution, PAC and PAM are added in treated in step 7, step 6 waste liquid and carries out reaction precipitating, Remove suspended contaminant and Ca in waste water2+、Mg2+Deng pretreatment as subsequent recycle-water filtration treatment；
Step 8, by treated in step 7, solution flows into PH readjustment pond, and sulfuric acid is added and carries out PH adjusting, will be molten after adjusting Liquid is flowed into more medium filter, and the effective suspended impurity that removes makes clarification of water；
Step 9 will produce water into subsequent UF filtering through more medium filter in step 8, produces water after UF filtering and is promoted through pump Enter in cartridge filter afterwards, the fine particles of 1 degree of turbidity of removal or more, as the subsequent pretreatment further filtered；
Step 10, solution cartridge filter in step 9 filtered is flowed into level-one RO and produces pond after level-one RO produces water In；Level-one RO is produced into the solution in pond after secondary RO produces water, secondary RO is flowed into and produces in pond, finally produce secondary RO The solution in pond flows into mixed bed, and the kind mineral salt in water is removed substantially, demineralized water is recycled.
2. a kind of plumbic acid waste water treatment process according to claim 1, it is characterised in that: in the step 3 and step 6 The metal precipitates generated under strong acidic environment enter to after pump is discharged into heavy metal-polluted mud sump, are pressed by plate and frame filter press Contracting dehydration, treated, and pressing filtering liquid flows into acid waste water collecting pit, and filter-press residues are transported to meltshop.
3. a kind of plumbic acid waste water treatment process according to claim 1, it is characterised in that: contain in the heavy metal chelating device There is heavy metal paving to catch agent, it is a kind of organic polymer water-purifying material that heavy metal paving, which catches agent, dedicated in absorption strongly acid wastewater Metal ion, accelerate the precipitation and separation of metal ion, avoid metal ion enter subsequent neutralization precipitation sludge, generate danger It is useless, to avoid generating the dangerous waste disposition expense of wholesale.
4. a kind of plumbic acid waste water treatment process according to claim 1, it is characterised in that: the UF filtering and security personnel's filtering Device filtering constitutes multi-ultrafiltration, the multi-ultrafiltration as film filtering, is the membrane process separated using the sieving actoion of film.
CN201910607643.5A 2019-07-08 2019-07-08 A kind of plumbic acid waste water treatment process Pending CN110342680A (en)

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CN113526736A (en) * 2021-08-02 2021-10-22 太和县大华能源科技有限公司 Waste acid recovery device and recovery method of lead-acid storage battery

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