CN104402102B - A kind of dyeing waste water strenuous primary treatment coagulant and preparation method thereof - Google Patents

A kind of dyeing waste water strenuous primary treatment coagulant and preparation method thereof Download PDF

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Publication number
CN104402102B
CN104402102B CN201410746787.6A CN201410746787A CN104402102B CN 104402102 B CN104402102 B CN 104402102B CN 201410746787 A CN201410746787 A CN 201410746787A CN 104402102 B CN104402102 B CN 104402102B
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waste water
dyeing waste
primary treatment
strenuous primary
spent acid
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CN104402102A (en
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仝武刚
梅荣武
李欲如
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Zhejiang Environmental Science Research and Design Institute
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Zhejiang Environmental Science Research and Design Institute
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • 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
    • C02F1/66—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
    • 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
    • C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
    • 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
    • C02F2101/308—Dyes; Colorants; Fluorescent agents

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

Abstract

The invention discloses a kind of dyeing waste water strenuous primary treatment coagulant, the weight portion composition of its raw material includes: 35～45 parts of bodied ferric sulfates, 1～5 part of aluminum chloride, 0.1～0.2 part of oxidant and 50～60 parts of spent acid.The invention also discloses the preparation method of a kind of dyeing waste water strenuous primary treatment coagulant, comprise the following steps: the liquid polymeric iron sulfate of 35～45 weight portions and the solid aluminum chloride of 1～5 weight portions are mixed into solution by (1)；(2) oxidant of 0.1～0.2 weight portion is added；(3) by the spent acid adjustment solution ph of 50～60 weight portions to 2～3, a kind of dyeing waste water strenuous primary treatment coagulant is i.e. obtained.The preparation method of the dyeing waste water strenuous primary treatment coagulant of the present invention, relatively conventional polymeric ferric aluminum production technology, preparation process is the simplest, makes full use of spent acid regulation acidity and the co-oxidation effect with PAFS, play medicament high treatment capacity, it is simple to popularization and application.

Description

A kind of dyeing waste water strenuous primary treatment coagulant and preparation method thereof
Technical field
The present invention relates to Environmental Chemistry water-treatment technology field, be specifically related to a kind of dyeing waste water strenuous primary treatment coagulant And preparation method thereof.
Background technology
Coagulation is conventional treatment method in dyeing waste water pretreatment, the COD concentration of general dyeing waste water 1000～ Between 4000mg/L, the COD after coagulation pretreatment can remove 30～50%, provides for subsequent biochemical and preferably processes bar Part.
Existing dyeing waste water coagulated agent mainly includes aluminum system and ferric flocculant, is characterized in that market supply is big, valency Lattice are cheap, and treatment effect is stable, and particularly ferrous sulfate not only has coagulation, also decolorization, in the enterprise that much prints and dyes Industry is as the first-selection of coagulant.But owing to its sludge quantity is big, COD clearance ratio is relatively low, along with carrying of printing and dyeing discharge standard Height and the raising of printing and dyeing sludge cost of disposal, the market demand of novel coagulated agent is increased by printing and dyeing enterprise.
The medicament substituting ferrous sulfate at present has PAC (aluminium polychlorid), PFS (bodied ferric sulfate), PFC (polyaluminium Ferrum) and PFAS (PAFS).Wherein with PAC (aluminium polychlorid), PFS (bodied ferric sulfate) and PFC (polyaluminium Ferrum) compare, it is fast that PAFS forms flco relatively, and precipitation granule is big, and sedimentation velocity is fast, and coagulation is substantially better than other Three kinds of medicaments.Meanwhile, PAFS is little on pH impact, and turbidity removal rate is relatively strong, and without the biggest corrosivity.
The Chinese patent literature of Publication No. CN1337356A discloses the life of a kind of aluminium iron sulfate polymer as composite water purifying agent Production. art, producing after sulphuric acid with sulfuric acid plant is raw material containing ferrum oxide waste residue, according to stoichiometry, by water, slag, sulphuric acid successively Reacting in adding reactor, the water being subsequently adding isodose is diluted, and the reactant after dilution enters subsider, adds A small amount of flocculant natural subsidence, solid-liquid separation, more above-mentioned clear liquid is squeezed into aggregation container, add H2O2With clear liquid Quick Oxidation Polymerization, obtains PAFS finished fluid.Above-mentioned finished fluid spontaneous nucleation after dehydration by evaporation, discharging, then crushes granulating Shape or powdery, obtain solid polymeric aluminum ferric sulfate.
Such scheme is with waste residue as raw material, and production cost is low, and technique is simple；Aluminum, ferrum are compound, process sewage effect and are better than list Matter product, can reach the treatment of wastes with processes of wastes against one another, has floccule body and form speed soon in water treatment procedure, and Floc density is big, sedimentation velocity The feature such as fast.
Additionally also have a kind of common PAFS production technology, add the most in a kettle. ferrous sulfate, Within static 30 minutes, filter after sulphuric acid and the reaction of sodium metasilicate low rate mixing and go the removal of impurity, be prepared as A material；Again in another reactor Within static 60 minutes, filter after adding hydrochloric acid, calcium aluminate powder, the reaction of ferrum aluminum stone powder low rate mixing and go the removal of impurity, be prepared as B material；By A Material and B material add low rate mixing in the 3rd reactor, are separately added into chlorine dioxide and the static synthetic reaction of bleaching powder 60 simultaneously Minute.
For COD concentration dyeing waste water between 1000～4000mg/L, above-mentioned existing method is used to prepare PAFS dyeing waste water is carried out coagulation pretreatment, although after process, COD clearance can reach 60%, but The existing method preparing PAFS is the most complicated, and general water purification agent factory uses less, hardly results in popularization.
Summary of the invention
The invention provides a kind of dyeing waste water strenuous primary treatment coagulant, production cost is low, and COD clearance is high.
The present invention solves the technical scheme of problem: a kind of dyeing waste water strenuous primary treatment coagulant, the weight of its raw material Part composition includes:
Wherein, bodied ferric sulfate is that liquid, aluminum chloride and oxidant are solid.
The dyeing waste water strenuous primary treatment coagulant of the present invention is strengthened for the dyeing waste water that COD is 1000～4000mg/L Pretreatment.
Inventor finds through great many of experiments, and spent acid consumption has large effect to final treatment effect, it is necessary to add Appropriate spent acid guarantee has certain basicity and preferable flocculating effect.If it is very few to add spent acid, A13+And Fe3+Hydrolysis Reaction just carry out ratio more thoroughly, the basicity of end product can excessive, cause generation precipitate and unstable.Add spent acid amount mistake Many, then generate Al2(SO4)3And Fe2(SO4)3Probability rise, Al3+And Fe3+Hydrolysis tendency reduces, the basicity of end product Also decrease.
Except the impact of spent acid consumption, the proportioning of other each raw materials plays vital effect to final coagulation effect, Coordinated between them.
As preferably, the weight portion composition of the raw material of the dyeing waste water strenuous primary treatment coagulant of the present invention includes:
As further preferably, the weight portion composition of the raw material of the dyeing waste water strenuous primary treatment coagulant of the present invention wraps Include:
Aluminum chloride can not only provide Al3+, and aoxidize formation polymer through sodium perchlorate, improve the alkali of this medicament Degree.And the basicity of the aluminium salt such as aluminum sulfate, aluminum nitrate is the lowest, it is impossible to meet coagulation condition requirement.
Described oxidant can select the oxidant such as hydrogen peroxide, potassium permanganate, but the present invention focuses on economical and practical, the most excellent Selection of land, described oxidant is sodium chlorate.
Containing a small amount of reducing substances (predominantly Fe in bodied ferric sulfate2+), sodium chlorate as a strong oxidizer to it Middle reducing substances aoxidizes.Sodium chlorate has mainly converted the reducing substances in bodied ferric sulfate in oxidizing process, The ferrous ion in bodied ferric sulfate is made to be fully converted into the iron ion of triple bond, enhanced coagulation effect.
The dyeing waste water strenuous primary treatment coagulant that the formula of the present invention obtains finally is in a liquid state, the dyeing waste water of the present invention The clearance of strenuous primary treatment coagulant COD is high, have employed spent acid as raw material, refuse has been carried out again with, reduce Cost.
As preferably, described spent acid COD is 1000～3000mg/L, and pH value is 1～2.
As preferably, described spent acid is waste hydrochloric acid or Waste Sulfuric Acid.
Organic Materials of Spent acid too high levels can cause in use in organic substance residues and water body, and impact processes water body COD's Remove.
General dyeing waste water is alkaline water, and pH value is 8～about 9, and adding spent acid purpose is to play adjustment in coagulation process The effect of pH value, owing to the mechanism of acid has certain oxidisability, therefore can play assistant degradation one in coagulation process A little Organic substances, make coagulant and acid play synchronous degradation COD.
Present invention also offers the preparation method of a kind of dyeing waste water strenuous primary treatment coagulant, comprise the following steps:
(1) the liquid polymeric iron sulfate of 35～45 weight portions and the solid aluminum chloride of 1～5 weight portions are mixed into solution；
(2) the solid sodium chlorate of 0.1～0.2 weight portion is added；
(3) by the spent acid adjustment solution ph of 50～60 weight portions to 2～3, a kind of pre-place of dyeing waste water strengthening is i.e. obtained Reason coagulant.
As preferably, the consumption of described bodied ferric sulfate is 35～40 weight portions；The consumption of described aluminum chloride is 4～5 weights Amount part；Described oxidant is solid sodium chlorate, and its consumption is 0.15～0.2 weight portion；Described spent acid is waste hydrochloric acid, and its consumption is 50～55 weight portions.
As preferably, the consumption of described bodied ferric sulfate is 35～38 weight portions；The consumption of described aluminum chloride is 4～5 weights Amount part；Described oxidant is solid sodium chlorate, and its consumption is 0.18～0.2 weight portion；Described spent acid is Waste Sulfuric Acid, and its consumption is 50～52 weight portions.
The preparation method of the dyeing waste water strenuous primary treatment coagulant of the present invention, relatively conventional polymeric ferric aluminum production technology, Preparation process is the simplest, makes full use of spent acid regulation acidity and the co-oxidation effect with PAFS, plays medicine Agent high treatment capacity, it is simple to popularization and application.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1
35 part by weight of liquid bodied ferric sulfates and 5 parts by weight solids aluminum chloride are mixed, then adds 0.2 weight portion solid Body sodium chlorate, with the spent acid adjustment pH value of 50 weight portions to 2～3, obtains the coagulant of the present invention.
The coagulant obtained is compared, in dosage phase with PAC (aluminium polychlorid), PFAS (PAFS) Under conditions of Tong, processing same dyeing waste water, treatment effect is as follows:
Embodiment 2
By liquid polymeric iron sulfate and the solid aluminum chloride mixing of 5 weight portions of 35 weight portions, then add 0.2 weight The solid sodium chlorate of part, with the spent acid adjustment pH value of 50 weight portions to 2～3, obtains coagulant of the present invention,
The coagulant obtained is compared, in dosage phase with PAC (aluminium polychlorid), PFAS (PAFS) Under conditions of Tong, processing same dyeing waste water, treatment effect is as follows:
Embodiment 3
By liquid polymeric iron sulfate and the solid aluminum chloride mixing of 1 weight portion of 45 weight portions, then add 0.1 weight The solid sodium chlorate of part, with the spent acid adjustment pH value of 60 weight portions to 2～3, obtains coagulant of the present invention.
The coagulant obtained is compared, in dosage phase with PAC (aluminium polychlorid), PFAS (PAFS) Under conditions of Tong, processing same dyeing waste water, treatment effect is as follows:
Embodiment 4
By liquid polymeric iron sulfate and the solid aluminum chloride mixing of 4 weight portions of 40 weight portions, then add 0.15 weight The solid sodium chlorate of amount part, with the spent acid adjustment pH value of 55 weight portions to 2～3, obtains coagulant of the present invention.
The coagulant obtained is compared, in dosage phase with PAC (aluminium polychlorid), PFAS (PAFS) Under conditions of Tong, processing same dyeing waste water, treatment effect is as follows:

Claims (2)

1. a dyeing waste water strenuous primary treatment coagulant, the weight portion composition of its raw material includes:
The COD of described spent acid is 1000～3000mg/L, and pH value is 1～2；
Described spent acid is waste hydrochloric acid or Waste Sulfuric Acid；
Described oxidant is solid sodium chlorate；And prepare by the following method:
(1) the liquid polymeric iron sulfate of 35～40 weight portions and the solid aluminum chloride of 4～5 weight portions are mixed into solution；
(2) oxidant of 0.15～0.2 weight portion is added；
(3) by the spent acid adjustment solution ph of 50～55 weight portions to 2～3, i.e. obtain a kind of dyeing waste water strenuous primary treatment and mix Solidifying agent.
2. dyeing waste water strenuous primary treatment coagulant as claimed in claim 1, it is characterised in that the weight portion composition of its raw material Including:
CN201410746787.6A 2014-12-09 2014-12-09 A kind of dyeing waste water strenuous primary treatment coagulant and preparation method thereof Active CN104402102B (en)

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CN104709989B (en) * 2015-03-19 2017-05-31 韩山师范学院 A kind of coagulant of wastewater treatment and preparation method thereof
CN112978883A (en) * 2019-12-17 2021-06-18 大唐环境产业集团股份有限公司 Composite medicament for desulfurization wastewater treatment and preparation method thereof

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CN1225410C (en) * 2003-01-23 2005-11-02 江西省科学院能源研究所 Compounded flocculant and its prep.
CN100387532C (en) * 2005-08-26 2008-05-14 南京工业大学 Coagulant for disposing dying waste water and its production method
KR20090109264A (en) * 2008-04-15 2009-10-20 동우 화인켐 주식회사 Method for recovering of dyeing solution from waste solution for polarizing film and method for preparing polarizing film using the recovered dyeing solution
CN101445286B (en) * 2008-12-26 2011-02-09 南京师范大学 Method for producing water treatment agent polyaluminium chloride from industrial waste residues
CN101885525B (en) * 2009-05-11 2012-02-15 山东德科生物科技开发有限公司 Production method of polymerized aluminium ferric chloride sulphate
CN103030198A (en) * 2012-11-29 2013-04-10 韩晓刚 Preparation method of dyeing wastewater decolorizing coagulant
CN103466767A (en) * 2013-03-19 2013-12-25 绍兴伊诺环保科技有限公司 Coagulant for treating printing and dyeing wastewater and production method thereof
CN104108775A (en) * 2014-07-10 2014-10-22 杭州电子科技大学 Composite reagent for treating recycled water of printing and dyeing wastewater and application method of composite reagent

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