CN105384288A - System and method for treating acidic wastewater produced in acid making with smelting gas - Google Patents
System and method for treating acidic wastewater produced in acid making with smelting gas Download PDFInfo
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- CN105384288A CN105384288A CN201510816604.8A CN201510816604A CN105384288A CN 105384288 A CN105384288 A CN 105384288A CN 201510816604 A CN201510816604 A CN 201510816604A CN 105384288 A CN105384288 A CN 105384288A
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- thickener
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- 239000002351 wastewater Substances 0.000 title claims abstract description 60
- 239000002253 acid Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000003723 Smelting Methods 0.000 title abstract description 8
- 230000002378 acidificating effect Effects 0.000 title abstract 3
- 239000002562 thickening agent Substances 0.000 claims abstract description 86
- 239000007788 liquid Substances 0.000 claims abstract description 63
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000010521 absorption reaction Methods 0.000 claims abstract description 34
- 229940087654 iron carbonyl Drugs 0.000 claims abstract description 31
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 30
- 239000006228 supernatant Substances 0.000 claims abstract description 26
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000706 filtrate Substances 0.000 claims abstract description 22
- 238000003825 pressing Methods 0.000 claims abstract description 17
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 12
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000000975 co-precipitation Methods 0.000 claims abstract description 11
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 10
- 229910052979 sodium sulfide Inorganic materials 0.000 claims abstract description 8
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000003860 storage Methods 0.000 claims description 67
- 238000006243 chemical reaction Methods 0.000 claims description 60
- 238000005273 aeration Methods 0.000 claims description 48
- 238000001914 filtration Methods 0.000 claims description 18
- 238000001556 precipitation Methods 0.000 claims description 12
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 159000000013 aluminium salts Chemical class 0.000 claims description 10
- 229910000329 aluminium sulfate Inorganic materials 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 239000011790 ferrous sulphate Substances 0.000 claims description 9
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 9
- 238000005189 flocculation Methods 0.000 claims description 9
- 230000016615 flocculation Effects 0.000 claims description 9
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 9
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 9
- 239000003814 drug Substances 0.000 claims description 8
- 230000000536 complexating effect Effects 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 7
- 238000005342 ion exchange Methods 0.000 claims description 7
- 230000008676 import Effects 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 235000010265 sodium sulphite Nutrition 0.000 claims description 6
- 238000004073 vulcanization Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 239000012141 concentrate Substances 0.000 claims description 4
- 238000006467 substitution reaction Methods 0.000 claims description 4
- 238000005987 sulfurization reaction Methods 0.000 claims description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- 102000005393 Sodium-Potassium-Exchanging ATPase Human genes 0.000 claims description 3
- 108010006431 Sodium-Potassium-Exchanging ATPase Proteins 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 239000012295 chemical reaction liquid Substances 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- JESHZQPNPCJVNG-UHFFFAOYSA-L magnesium;sulfite Chemical compound [Mg+2].[O-]S([O-])=O JESHZQPNPCJVNG-UHFFFAOYSA-L 0.000 abstract description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 abstract 1
- 239000002920 hazardous waste Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 239000011133 lead Substances 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- -1 after precipitation Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- PVGBHEUCHKGFQP-UHFFFAOYSA-N sodium;n-[5-amino-2-(4-aminophenyl)sulfonylphenyl]sulfonylacetamide Chemical compound [Na+].CC(=O)NS(=O)(=O)C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=C1 PVGBHEUCHKGFQP-UHFFFAOYSA-N 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000005200 wet scrubbing Methods 0.000 description 1
Classifications
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- 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
- C02F1/5281—Installations for water purification using chemical 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
- C02F1/66—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
- 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
- C02F7/00—Aeration of stretches of water
Landscapes
- 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)
- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a system and a method for treating acidic wastewater produced in acid making with smelting gas. The system and method disclosed by the invention are implemented through the steps that after a sodium sulfide solution and acidic wastewater are fed into a first-order reactor to react for removing part of heavy metals and arsenic in acid water, the obtained object enters a first-order thickener; bottom mud in the thickener, after being subjected to, is recycled, liquid supernatant and filtrate produced by a filter press enter a second-order reactor, and then the liquid supernatant, the filtrate, magnesium oxide absorption liquid discharged after being desulfurized in an environmental-friendly smelting gas gathering system and added into the second-order reactor, a prepared magnesium oxide solution, and a sulfuric acid in the acid water are subjected to a sufficient neutralization reaction by using magnesium oxide and magnesium sulfite contained in environmental-friendly gathered smelting gas desulfurized absorption liquid and a magnesium oxide solution; and an aluminum salt is added so as to reduce the heavy metal content of reaction liquid to a control range; the obtained object enters a second-order thickener, bottom mud in the thickener, after being subjected to filter pressing, is conveyed to a hazardous waste disposal site to carry out landfill disposal, and liquid supernatant and filtrate produced by the filter press enter a second-order reactor, after being subjected to deep treatment by using an iron carbonyl co-precipitation method and then reaching the standards, are recycled or discharged. According to the method, an effect of treatment of wastes with processes of wastes against one another is achieved, the pertinence is strong, the operation cost of environmental protection facilities is lowered, and the discharge amount of the system is reduced.
Description
Technical field
The invention belongs to chemical field, relate to the wastewater treatment in non-ferrous metal metallurgy, be specifically related to a kind for the treatment of system for acid waste water in metallurgical off-gas acid-making and method.
Background technology
In metallurgical off-gas acid-making wet scrubbing process, produce a large amount of acid waste water containing the heavy metals such as nickel, copper, lead and the harmful element such as arsenic, fluorine, contaminate environment, it is a difficult problem for puzzlement flue gas acid preparing all the time, existing treatment process function singleness, treating processes bother, the comprehensive circular treatment and each bad joint can not link together.
Summary of the invention
Of the present invention for the acid waste water in non-ferrous metal metallurgy flue gas acid preparing, object is to provide one to utilize in magnesia FGD absorption liquid and acid waste water, and use iron carbonyl coprecipitation method to carry out advanced treatment to the waste water after neutralization, realize the treatment process of acid waste water qualified discharge.
The object of the invention is to realize in the following manner: a kind for the treatment of system for acid waste water in metallurgical off-gas acid-making, the sour water conveying delivery side of pump of conveying acid waste water, and the sodium sulphite delivery side of pump to connect with sodium sulphite storage tank all connects with the entrance of A reactor, the outlet of A reactor is connected with one-level thickener entrance by pump tubing length, the underflow opening of one-level thickener is connected by pump tubing length with between the import of the first pressure filter, the overflow port of one-level thickener is connected by pipeline with the import of the first clear liquid storage tank, first clear liquid storage tank, magnesium oxide solution storage tank, ferrous sulfate storage tank, aluminium salt storage tank, the outlet of absorption liquid storage tank is all connected with the entrance of second reactor by pipeline, the outlet of second reactor is connected by the entrance of pump tubing length with secondary thickener, the top of secondary thickener is provided with flocculation agent storage tank and is communicated by pipeline with it, the underflow opening of secondary thickener is connected with the second pressure filter entrance by pump tubing length, the overflow port of secondary thickener is connected with the second clear liquid reservoir inlet port by pipeline, second clear liquid reservoir outlet is connected with equalizing tank entrance by pump tubing length, equalizing tank, one-level aeration tank, first order reaction is connected respectively by pump tubing length between pond successively, waste water in one-level aeration tank carries out aeration by the first gas blower to it, be provided with the first iron carbonyl storage tank above first order reaction pond and communicated by pipeline with it, the outlet in first order reaction pond is connected by the entrance of pump tubing length with three grades of thickeners, the underflow opening of three grades of thickeners is connected with the 3rd pressure filter entrance by pump tubing length, the overflow port of three grades of thickeners is connected with two-stage aeration tank entrance by pipeline, waste water in two-stage aeration tank carries out aeration by the second gas blower to it, the outlet of two-stage aeration tank is connected with second order reaction pond entrance by pump tubing length, the top second iron carbonyl storage tank in second order reaction pond is also communicated by pipeline with it, the outlet in second order reaction pond is connected by the entrance of pump tubing length with level Four thickener, the underflow opening of level Four thickener connects with the entrance of the 3rd pressure filter, the filtrate outlet of the 3rd pressure filter passes to equalizing tank by pipeline.
Adopt said system to carry out a treatment process for acid waste water in metallurgical off-gas acid-making, specifically comprise the following steps:
A. acid waste water and sodium sulfide solution are sent into A reactor, carry out vulcanization reaction, part of nickel, copper, plumbous heavy metal and arsenic in removing acid waste water, reaction solution is delivered to one-level thickener and is concentrated, precipitates, underflow delivers to the first pressure filter press filtration, and filter residue is recycled;
B. the overflow supernatant liquor of one-level thickener and the first filter press filtrate send into second reactor, neutralization reaction is carried out with the absorption liquid sent in second reactor and magnesium oxide solution, then the heavy metal ion added in ferrous sulfate and aluminium salt and reaction solution is reacted, then reaction solution is delivered to secondary thickener, add that flocculation agent is concentrated, after precipitation simultaneously, underflow delivers to the second pressure filter press filtration, filter residue delivers to the useless Treatment stations landfill of danger, and secondary thickener supernatant liquor and the second filter press filtrate enter the second clear liquid storage tank;
C. the part supernatant liquor in two clear liquid storage tanks is sent in equalizing tank, with the first transferpump, waste water in equalizing tank is sent into one-level aeration tank, by gas blower, aeration is carried out to one-level aeration basin wastewater, after aeration, first order reaction pond is sent into the second transferpump, the iron carbonyl in iron carbonyl storage tank is added in first order reaction pond, impurity in iron carbonyl and first order reaction pond waste water occurs to adsorb complexing, ion-exchange, parcel co-precipitation and lattice substitution reaction, after reaction, 3rd transferpump is delivered to three grades of thickeners and is concentrated, after precipitation, three grades of thickener underflows deliver to the 3rd pressure filter press filtration through the 3rd filter pressing pump, 3rd filter press filtrate returns to equalizing tank, 3rd filter residues of press filter is recycled,
D. three grades of thickener overflow supernatant liquors enter two-stage aeration tank, by the second gas blower, secondary aeration is carried out to two-stage aeration tank waste water, after aeration, second order reaction pond is sent into the 4th transferpump, the iron carbonyl medicament in iron carbonyl storage tank is added in second order reaction pond, impurity in iron carbonyl medicament and second order reaction pond waste water occurs to adsorb complexing again, ion-exchange, parcel co-precipitation and lattice substitution reaction, after reaction, deliver to level Four thickener with the 5th transferpump and carry out secondary concentration, after precipitation, level Four thickener underflow delivers to the 3rd pressure filter press filtration through the 4th filter pressing pump, filtrate after press filtration is returned to equalizing tank, 3rd filter residues of press filter is recycled, through removing metal in waste water further, arsenic pollutent, the overflow supernatant liquor utilization up to standard of level Four thickener or arrange outward.
Wherein, the remainder supernatant liquor in above-mentioned two clear liquid storage tanks is for configuring magnesia FGD absorption liquid or for formulating vulcanization sodium solution.
the invention has the beneficial effects as follows: magnesia FGD technique is administered and is smelted ring collection flue gas by the present invention, the absorption liquid produced contains magnesium oxide and magnesium sulfite, carry out neutralization reaction with acid waste water and again utilize, and using iron carbonyl coprecipitation method to carry out advanced treatment to the waste water after neutralization, realizing the qualified discharge of acid waste water.In treatment process, sodium sulfide solution and acid waste water input after A reactor reacts and remove part heavy metal in sour water and arsenic by the present invention, enter one-level thickener, reuse after the press filtration of thickener bed mud, supernatant liquor and filter press filtrate enter second reactor, with the magnesium oxide absorption liquid discharged after desulfurization in the smelting environmental protection natural gas gathering system added in second reactor and the magnesium oxide solution configured, utilize and smelt ring collection flue gas desulfurization absorption liquid and carry out abundant neutralization reaction containing the sulfuric acid in magnesium oxide and magnesium sulfite and magnesium oxide solution and sour water, add aluminium salt again, heavy metal resultant in reaction solution is down to span of control, enter secondary thickener, the useless Treatment stations landfill of danger is delivered to after the press filtration of thickener bed mud, supernatant liquor and the rear reuse up to standard of filter press filtrate iron carbonyl coprecipitation method advanced treatment or arrange outward.Treatment process of the present invention realizes the treatment of wastes with processes of wastes against one another, with strong points, reduces environmental protection facility working cost, reduces the outer water displacement of system, reaches acid waste water reuse up to standard or discharge.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
In figure: 1 sour water transferpump; 2 sodium sulphite storage tanks; 3 sulfuration sodium pumps; 4 A reactors; 5 first order reaction liquid transferpumps; 6 one-level thickeners; 7 first filter pressing pumps; 8 first clear liquid storage tanks; 9 first clear liquid pumps; 10 first pressure filter; 11 first filter residues of press filters; 12 magnesium oxide solution storage tanks; 13 ferrous sulfate storage tanks; 14 aluminium salt storage tanks; 15 flocculation agent storage tanks; 16 absorption liquid storage tanks; 17 absorption liquid transferpumps; 18 second reactors; 19 second order reaction liquid transferpumps; 20 secondary thickeners; 21 second filter pressing pumps; 22 second clear liquid storage tanks; 23 second clear liquid pumps; 24 second pressure filter; 25 second filter residues of press filters; 26 first gas blowers; 27 first iron carbonyl storage tanks; 28 gas-holder; 29 equalizing tanks; 30 first transferpumps; 31 one-level aeration tanks; 32 second transferpumps; 33 first order reaction ponds; 34 the 3rd transferpumps; 35 3 grades of thickeners; 36 the 3rd filter pressing pumps; 37 the 3rd pressure filter; 38 the 3rd filter residues of press filters; 39 second gas blowers; 40 second iron carbonyl storage tanks; 41 two-stage aeration tanks; 42 the 4th transferpumps, 43 second order reaction ponds; 44 the 5th transferpumps, 45 level Four thickeners; 46 the 4th filter pressing pumps; 47 level Four thickener supernatant liquors.
Embodiment
A kind for the treatment of system of acid waste water: the output terminal of the sour water transferpump 1 of conveying acid waste water, and the output terminal of the sulfuration sodium pump 3 to connect with sodium sulphite storage tank 2 is all connected by pipeline with the entrance of A reactor 4, the outlet of A reactor 4 is connected with one-level thickener 6 entrance by the pump tubing length of first order reaction liquid transferpump 5, connected by the pump tubing length of the first filter pressing pump 7 between the underflow opening of one-level thickener 6 and the import of the first pressure filter 10, the overflow port of one-level thickener 6 is connected by pipeline with the import of the first clear liquid storage tank 8, first clear liquid storage tank 8, magnesium oxide solution storage tank 12, ferrous sulfate storage tank 13, aluminium salt storage tank 14 is all connected by the entrance of pipeline with second reactor 18, absorption liquid storage tank 16
pass throughabsorption liquid transferpump 17 carries absorption liquid in second reactor 18, the outlet of second reactor 18 is connected with the entrance of secondary thickener 20 by the pump tubing length of second order reaction liquid transferpump 19, the top of secondary thickener 20 is provided with flocculation agent storage tank 15 and is communicated by pipeline with it, the underflow opening of secondary thickener 20 is connected with the second pressure filter 24 entrance by the pump tubing length of the second filter pressing pump 21, the overflow port of secondary thickener 20 is connected with the second clear liquid storage tank 22 entrance by pipeline, second clear liquid storage tank 22 is exported and is connected with equalizing tank 29 entrance by the pump tubing length of the second clear liquid pump 23, the outlet of equalizing tank 29 is connected with one-level aeration tank 31 entrance by the pump tubing length of the first transferpump 30, one-level aeration tank 31 is exported and is connected with first order reaction pond 33 entrance by the pump tubing length of the second transferpump 32, waste water in one-level aeration tank 31 carries out aeration by the first gas blower 26 to it, be provided with the first iron carbonyl storage tank 27 above first order reaction pond 33 and communicated by pipeline with it, the outlet in first order reaction pond 33 is connected with the entrance of three grades of thickeners 35 by the pump tubing length of the 3rd transferpump 34, the underflow opening of three grades of thickeners 35 is connected with the 3rd pressure filter 37 entrance by the pump tubing length of the 3rd filter pressing pump 36, the overflow port of three grades of thickeners 35 is connected with two-stage aeration tank 41 entrance by pipeline, waste water in two-stage aeration tank 41 carries out aeration by the second gas blower 39 to it, the outlet of two-stage aeration tank 41 is connected with second order reaction pond 43 entrance by the pump tubing length of the 4th transferpump 42, the top second iron carbonyl storage tank 40 in second order reaction pond 43 is also communicated by pipeline with it, the outlet in second order reaction pond 43 is connected with the entrance of level Four thickener 45 by the 5th transferpump 44 pump tubing length, the underflow opening of level Four thickener 45 is connected with the entrance of the 3rd pressure filter 37 by the pump tubing length of the 4th filter pressing pump 46, the filtrate outlet of the 3rd pressure filter 37 passes to equalizing tank 29 by pipeline.
Acid waste water and sodium sulfide solution are sent into A reactor, carry out vulcanization reaction, part of nickel in removing sour water, copper, lead waits heavy metal and arsenic, reaction solution is delivered to one-level thickener and is concentrated, precipitation, underflow delivers to pressure filter press filtration, filter residue is recycled, thickener overflow supernatant liquor and filter press filtrate send into second reactor, and carry out neutralization reaction by absorption liquid and magnesium oxide solution feeding second reactor, after pH is adjusted to OK range, add ferrous sulfate and aluminium salt, after the heavy metal resultant in reaction solution is down to span of control, reaction solution is delivered to secondary thickener, add flocculation agent to concentrate simultaneously, after precipitation, underflow delivers to the press filtration of secondary pressure filter, filter residue delivers to the useless Treatment stations landfill of danger, thickener supernatant liquor and filter press filtrate enter clear liquid storage tank, waste water after two-stage neutralization reaction, a part is returned to smelting environmental protection natural gas gathering system continuation configuration absorption liquid and sodium sulfide solution, a part enters the coprecipitated treatment process of iron carbonyl and carries out advanced treatment, to one-level, active iron-based medicament is added in second-stage treatment waste water, impurity in medicament and waste water occurs to adsorb complexing, ion-exchange, effect such as parcel co-precipitation and lattice replacement etc., realize various heavy, the synchronous removal of the pollution substances such as arsenic, reach the degree of depth and remove metal in waste water, the object of the pollutents such as arsenic, discharged wastewater met the national standard.
Embodiment
A kind of low-concentration sulfur dioxide smelts the fume treatment of ring collection: magnesium oxide is added magnesium oxide Preparation tank and prepare, after preparation, send into magnesium oxide slurrying tank through transferpump and carry out pulp, magnesia slurry storage tank is sent into through transferpump after pulp completes, magnesia slurry sends into absorption tower desulfurization through transferpump, blower fan sends smelting the ring collection flue gas produced into absorption tower, magnesium oxide absorption liquid is delivered to absorption tower spray equipment by ON cycle pump, absorption liquid from spray equipment spray and, contact with flue gas adverse current from bottom to top from absorption tower, flue gas is absorbed, after absorption, gas after the mist eliminating of mist eliminating device again through electrostatic precipitator demist, after dedusting is up to standard, emptying through chimney, after magnesium oxide absorption liquid recycles, sent in absorption liquid storage tank 16 by absorption liquid transferpump, pump in second reactor 18 through absorption liquid transferpump 17 and neutralize for sour water.
With reference to Fig. 1, technical process of the present invention is described further:
The process of acid waste water: acid waste water sour water transferpump 1 is sent into A reactor 4, sodium sulfide solution in sodium sulphite storage tank 2 is sent into A reactor 4 by sulfuration sodium pump 3, carry out vulcanization reaction, part of nickel in removing sour water, copper, lead waits heavy metal and arsenic, after reaction, with first order reaction liquid transferpump 5, reaction solution is delivered to one-level thickener 6 to concentrate, after precipitation, thickener underflow delivers to the first pressure filter 10 press filtration through the first filter pressing pump 7, first filter residues of press filter 11 is recycled, one-level thickener 6 overflow supernatant liquor and filter press filtrate enter the first clear liquid storage tank 8, through the first clear liquid pump 9, clear liquid is sent into second reactor, the clear liquid that magnesium oxide solution feeding second reactor in absorption liquid in absorption liquid storage tank 16 and magnesium oxide solution storage tank 12 and clear liquid pump 9 are sent into is carried out neutralization reaction by absorption liquid transferpump 17, after abundant reaction, after pH is adjusted to 7-8, add the ferrous sulfate in ferrous sulfate storage tank 13 and the aluminium salt in aluminium salt storage tank 14, after heavy metal resultant in reaction solution is down to 100mg/L, with second order reaction liquid transferpump 19, reaction solution is delivered to secondary thickener 20, from flocculation agent storage tank 15, add flocculation agent concentrate simultaneously, after precipitation, secondary thickener underflow delivers to the second pressure filter 24 press filtration through the second filter pressing pump 21, second filter residues of press filter 25 delivers to the useless Treatment stations landfill of danger, secondary thickener 20 overflow supernatant liquor and the second filter press filtrate enter the second clear liquid storage tank 22, a part of supernatant liquor is returned to smelting environmental protection natural gas gathering system continuation configuration magnesium oxide absorption liquid and sodium sulfide solution, remainder supernatant liquor is sent in equalizing tank 29 through the second clear liquid pump 23, with the first transferpump 30, waste water is sent into one-level aeration tank 31, aeration is carried out by the first gas blower 26 pairs of one-level aeration tank 31 waste water, after aeration, first order reaction pond 33 is sent into the second transferpump 32, iron carbonyl is added by the first iron carbonyl storage tank 27, impurity in iron carbonyl and waste water occurs to adsorb complexing, ion-exchange, effect such as parcel co-precipitation and lattice replacement etc., after reaction, 3rd transferpump 34 is delivered to three grades of thickeners 35 and is concentrated, after precipitation, three grades of thickener underflows deliver to the 3rd pressure filter 37 press filtration through the 3rd filter pressing pump 36, 3rd filter press filtrate returns to equalizing tank 29, 3rd filter residues of press filter 38 is recycled, three grades of thickener 35 overflow supernatant liquors enter two-stage aeration tank 41, secondary aeration is carried out by the second gas blower 39 pairs of two-stage aeration tank 41 waste water, after aeration, second order reaction pond 43 is sent into the 4th transferpump 42, iron carbonyl medicament is added by the second iron carbonyl storage tank 40, impurity in iron carbonyl medicament and waste water occurs to adsorb complexing again, ion-exchange, reaction such as parcel co-precipitation and lattice replacement etc., after reaction, deliver to level Four thickener 45 with the 5th transferpump 44 and carry out secondary concentration, after precipitation, thickener underflow delivers to the 3rd pressure filter 37 press filtration through the 4th filter pressing pump 46, 3rd filter press filtrate returns to equalizing tank 29, 3rd filter residues of press filter 38 is recycled, through removing metal in waste water further, the pollutents such as arsenic, level Four thickener supernatant liquor 47 utilization up to standard of level Four thickener 45 overflow or arrange outward.
Claims (3)
1. the treatment system for acid waste water in metallurgical off-gas acid-making, it is characterized in that: the output terminal of the sour water transferpump (1) of conveying acid waste water, and the output terminal of the sulfuration sodium pump (3) to connect with sodium sulphite storage tank (2) all connects with the entrance of A reactor (4), the outlet of A reactor (4) is connected with one-level thickener (6) entrance by pump tubing length, the underflow opening of one-level thickener (6) is connected by pump tubing length with between the import of the first pressure filter (10), the overflow port of one-level thickener (6) is connected by pipeline with the import of the first clear liquid storage tank (8), first clear liquid storage tank (8), magnesium oxide solution storage tank (12), ferrous sulfate storage tank (13), aluminium salt storage tank (14), the outlet of absorption liquid storage tank (16) is all connected by the entrance of pipeline with second reactor (18), the outlet of second reactor (18) is connected by the entrance of pump tubing length with secondary thickener (20), the top of secondary thickener (20) is provided with flocculation agent storage tank (15) and is communicated by pipeline with it, the underflow opening of secondary thickener (20) is connected with the second pressure filter (24) entrance by pump tubing length, the overflow port of secondary thickener (20) is connected with the second clear liquid storage tank (22) entrance by pipeline, second clear liquid storage tank (22) outlet is connected with equalizing tank (29) entrance by pump tubing length, equalizing tank (29), one-level aeration tank (31), first order reaction pond is connected respectively by pump tubing length between (33) successively, waste water in one-level aeration tank (31) carries out aeration by the first gas blower (26) to it, top, first order reaction pond (33) is provided with the first iron carbonyl storage tank (27) and is communicated by pipeline with it, the outlet in first order reaction pond (33) is connected by the entrance of pump tubing length with three grades of thickeners (35), the underflow opening of three grades of thickeners (35) 35 is connected with the 3rd pressure filter (37) entrance by pump tubing length, the overflow port of three grades of thickeners (35) is connected with two-stage aeration tank (41) entrance by pipeline, waste water in two-stage aeration tank (41) carries out aeration by the second gas blower (39) to it, the outlet of two-stage aeration tank (41) is connected with second order reaction pond (43) entrance by pump tubing length, the top second iron carbonyl storage tank (40) in second order reaction pond (43) is also communicated by pipeline with it, the outlet in second order reaction pond (43) is connected by the entrance of pump tubing length with level Four thickener (45), the underflow opening of level Four thickener (45) connects with the entrance of the 3rd pressure filter (37), the filtrate outlet of the 3rd pressure filter (37) passes to equalizing tank (29) by pipeline.
2. utilize system as claimed in claim 1 to carry out a treatment process for acid waste water in metallurgical off-gas acid-making, it is characterized in that: specifically comprise the following steps:
A. acid waste water and sodium sulfide solution are sent into A reactor (4), carry out vulcanization reaction, part of nickel, copper, plumbous heavy metal and arsenic in removing acid waste water, reaction solution is delivered to one-level thickener (6) and is concentrated, precipitates, underflow delivers to the first pressure filter (10) press filtration, and filter residue is recycled;
B. the overflow supernatant liquor of one-level thickener (6) and the first pressure filter (10) filtrate send into second reactor (18), neutralization reaction is carried out with the absorption liquid sent in second reactor (18) and magnesium oxide solution, then the heavy metal ion added in ferrous sulfate and aluminium salt and reaction solution is reacted, reaction solution delivers to secondary thickener (20), add flocculation agent to concentrate simultaneously, after precipitation, underflow delivers to the second pressure filter (24) press filtration, filter residue delivers to the useless Treatment stations landfill of danger, secondary thickener (20) supernatant liquor and the second pressure filter (24) filtrate enter the second clear liquid storage tank (22),
C. the part supernatant liquor in two clear liquid storage tanks (22) is sent in equalizing tank (29), with the first transferpump (30), waste water in equalizing tank (29) is sent into one-level aeration tank (31), by gas blower (26), aeration is carried out to one-level aeration tank (31) waste water, after aeration, first order reaction pond (33) is sent into the second transferpump (32), the iron carbonyl in iron carbonyl storage tank (27) is added in first order reaction pond (33), impurity in iron carbonyl and first order reaction pond (33) waste water occurs to adsorb complexing, ion-exchange, parcel co-precipitation and lattice substitution reaction, after reaction, 3rd transferpump (34) is delivered to three grades of thickeners (35) and is concentrated, after precipitation, three grades of thickener underflows deliver to the 3rd pressure filter (37) press filtration through the 3rd filter pressing pump (36), 3rd pressure filter (37) filtrate is returned to equalizing tank (29), 3rd filter residues of press filter (38) is recycled,
D. three grades of thickener (35) overflow supernatant liquors enter two-stage aeration tank (41), by the second gas blower (39), secondary aeration is carried out to two-stage aeration tank (41) waste water, after aeration, second order reaction pond (43) is sent into the 4th transferpump (42), the iron carbonyl medicament in iron carbonyl storage tank (40) is added in second order reaction pond (43), impurity in iron carbonyl medicament and second order reaction pond (43) waste water occurs to adsorb complexing again, ion-exchange, parcel co-precipitation and lattice substitution reaction, after reaction, deliver to level Four thickener (45) with the 5th transferpump (44) and carry out secondary concentration, after precipitation, level Four thickener underflow delivers to the 3rd pressure filter (37) press filtration through the 4th filter pressing pump (46), filtrate after press filtration is returned to equalizing tank (29), 3rd filter residues of press filter (38) is recycled, through removing metal in waste water further, arsenic pollutent, overflow supernatant liquor (47) utilization up to standard of level Four thickener (45) or arrange outward.
3. a kind for the treatment of process for acid waste water in metallurgical off-gas acid-making as claimed in claim 2, is characterized in that: the remainder supernatant liquor in two clear liquid storage tanks (22) is for configuring magnesia FGD absorption liquid or for formulating vulcanization sodium solution.
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Effective date of registration: 20240205 Address after: 737100 No. 2 Lanzhou Road, Beijing Road Street, Jinchuan District, Jinchang City, Gansu Province Patentee after: Jinchuan Group Nickel Cobalt Co.,Ltd. Country or region after: China Address before: 737103 No. 98, Jinchuan Road, Jinchang, Gansu Patentee before: JINCHUAN GROUP Co.,Ltd. Country or region before: China |