CN101591054A - Compound color-odor removal coagulating agent and production method and be used for the technology that leather sewage is handled - Google Patents
Compound color-odor removal coagulating agent and production method and be used for the technology that leather sewage is handled Download PDFInfo
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- CN101591054A CN101591054A CNA2009100165342A CN200910016534A CN101591054A CN 101591054 A CN101591054 A CN 101591054A CN A2009100165342 A CNA2009100165342 A CN A2009100165342A CN 200910016534 A CN200910016534 A CN 200910016534A CN 101591054 A CN101591054 A CN 101591054A
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
Compound color-odor removal coagulating agent and production method and be used for the technology that leather sewage is handled, comprise that following raw materials by weight percent makes iron magnesium sulfate: content is 85% magnesium oxide 25～40%; The sulfuric acid 50～70% of 25～30% concentration; Ferrous sulfate 5～12%; Then with the above-mentioned iron magnesium sulfate that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product: iron magnesium sulfate 30%～45%; Content is 98% active hydrogen calcium oxide 55%～70%.Performances such as compound color-odor removal coagulating agent of the present invention has highly effective coagulation, and the pH value is applied widely, and the degradation rate height decolours flavor comprehensively, and is cheap.When being used for the leather sewage processing,, various oxious components are dropped to national GB8978-1996 below three grades, guarantee next link steady running at settling tank by coagulation, flocculation.Guarantee that water outlet reaches standard and reuse.The said process dwell time of sewage reduces 2/3 than biochemical, physico-chemical process.Can reduce expenses, reduce investment.
Description
Technical field
The present invention relates to a kind of coagulation, flocculation agent and production method thereof that is used for water and sewage treatment area, and the technology of leather sewage processing, be particularly related to a kind of compound color-odor removal coagulating agent and production method thereof, and compound color-odor removal coagulating agent is used for the technology that leather sewage is handled.
Background technology
In energy-saving and emission-reduction, in the industries such as city leather, printing and dyeing, papermaking, plating, coal tar chemical industry, petrochemical complex and food pharmaceutical, must carry out water treatment in order to conform the governance for reaching standard discharging.
Environmental pollution at present mainly is topsoil and water pollution etc.Major part blowdown enterprise has realized that the seriousness of pollution.Industries such as leather, printing and dyeing, papermaking, plating, coal tarization and petrochemical industry and food pharmaceutical are discharged large amount of organic and heavy metal nuisance, and country is just strengthening management.
Coagulating agent, the flocculation agent kind of usefulness are more now, but also have certain problem.Be not the COD degradation rate low be exactly that use range is less, can not satisfy the needs of most of industry sewage disposal.Having of being used at present is following several: (1) low-molecular inorganic coagulating agent: Tai-Ace S 150, ferrous sulfate.Though certain effect is arranged but low to organic matter degradation.(2) inorganic polymer coagulant: polymerize aluminum chloride, bodied ferric sulfate.Though certain coagulation effect arranged but be subjected to the influence of pH value in the sewage, to the variation bad adaptability of sewage.(3) organic polymer coargulator: polyacrylamide, Dyhard RU 100-formaldehyde condensation products.Though certain decolouring flavor effect is arranged, but still to no effect to each big industry part dye product.
In addition, in the wastewater treatment of industries such as leather, fur, whitewashing, scouring of wool, must carry out composite algorithm and handle in order to conform the governance for reaching standard discharging.
Environmental pollution at present mainly is atmosphere and contaminated wastewater, and blowdown enterprise has had recognized that the seriousness of polluting.Leather is the heavily contaminated industry in the industry of contaminated wastewater.SS, COD, colourity, Cr total amount, nuisances such as S, NH4-N, bronsted lowry acids and bases bronsted lowry are seriously polluted, and the refractory reason.
Physico-chemical processes, biochemical process, biological processes that the sewage treatment process great majority that present leather industry is used adopt, but have certain problem: not that degradation rate is low, the working cost height, difficult operation is exactly a fluctuation of service.Can make wastewater treatment up to standard and technology steady running is few.Having of being used at present is following several:
1, activated sludge process: be applicable to the sewage that processing requirements height and water quality are steady relatively, but require feedwater quality concentration especially to have the inhibitory substance concentration can not be high.And sulfide in the leather-making waste water and chromium have inhibition to biochemistry when surpassing finite concentration together; The incompatibility impact load needs high power and capital cost; Floor space is also big, and general enterprise is difficult to bear; Not good to the ammonia nitrogen treatment effect in the waste water simultaneously.
2, biological contact oxidation process: be that a kind of microbial film facture has stronger anti impulsion load ability, the mud growing amount is few, no sludge bulking, and manageability, but be easy to generate obstruction, safeguard also relatively difficulty.In case the system of going wrong must out of servicely just can safeguard.
3, SBR method: the SBR method is called the interval type activated sludge process, is in single contactor, water inlet in chronological order, aeration, precipitation, water outlet, standby elementary operations such as (leaving unused).Begin to end up being one-period from sewage disposal, reach the purpose of sewage disposal thereby go round and begin again to standby time.But this process spent water residence time is long, and temperature, pH value are required height, the high basicity of incompatibility, and northern area.
Summary of the invention
The purpose of this invention is to provide a kind of compound color-odor removal coagulating agent and production method thereof, and compound color-odor removal coagulating agent is used for the technology that leather sewage is handled.
For achieving the above object, the technical solution used in the present invention is:
A kind of compound color-odor removal coagulating agent is characterized in that: comprise that following raw materials by weight percent makes sal epsom:
Content is 85% magnesium oxide 20～50%;
The sulfuric acid 50～80% of 25～30% concentration;
Then with the above-mentioned sal epsom that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Sal epsom 30%～55%;
Content is 98% active hydrogen calcium oxide 45%～70%.
According to described compound color-odor removal coagulating agent, it is characterized in that: comprise that following raw materials by weight percent makes sal epsom:
Content is 85% magnesium oxide 40%;
The sulfuric acid 60% of 30% concentration;
Then with the above-mentioned sal epsom that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Sal epsom 40%;
Content is 98% active hydrogen calcium oxide 60%.
According to described compound color-odor removal coagulating agent, it is characterized in that: comprise that following raw materials by weight percent makes iron magnesium sulfate:
Content is 85% magnesium oxide 25～40%;
The sulfuric acid 50～70% of 25～30% concentration;
Ferrous sulfate 5～12%;
Then with the above-mentioned iron magnesium sulfate that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Iron magnesium sulfate 30%～45%;
Content is 98% active hydrogen calcium oxide 55%～70%.
According to described compound color-odor removal coagulating agent, it is characterized in that: comprise that following raw materials by weight percent makes iron magnesium sulfate:
Content is 85% magnesium oxide 35%;
The sulfuric acid 55% of 30% concentration;
Ferrous sulfate 10%;
Then with the above-mentioned iron magnesium sulfate that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Iron magnesium sulfate 40%;
Content is 98% active hydrogen calcium oxide 60%.
According to described compound color-odor removal coagulating agent, it is characterized in that: comprise that following raw materials by weight percent makes iron magnesium sulfate:
Content is 85% magnesium oxide 20～35%;
The sulfuric acid 50～65% of 25～30% concentration;
Brown iron oxide 5～25%;
Then with the above-mentioned iron magnesium sulfate that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Iron magnesium sulfate 40%～55%;
Content is 98% active hydrogen calcium oxide 45%～60%.
According to described compound color-odor removal coagulating agent, it is characterized in that: comprise that following raw materials by weight percent makes iron magnesium sulfate:
Content is 85% magnesium oxide 30%;
The sulfuric acid 60% of 30% concentration;
Brown iron oxide 10%;
Then with the above-mentioned iron magnesium sulfate that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Iron magnesium sulfate 50%;
Content is 98% active hydrogen calcium oxide 50%.
A kind of production method of described compound color-odor removal coagulating agent, it is characterized in that: by the weight percent of described raw material, the sulfur waste acid concentration of Titanium White Production By Sulfuric Acid Process byproduct being transferred to 25～30% dropping into reaction tanks, is content that 85% magnesium oxide adds reaction tank by proportioning; Heat is emitted in reaction, and the reflection time is 1～3 hour; After filtration liquid is mentioned concentration tank with acid proof pump, be heated to 250 ℃～300 ℃, concentrate 1～3 hour; Mention crystallizing pond again, the normal temperature crystallization time is 3～5 hours, and through dehydration, drying makes sal epsom; Then exsiccant sal epsom is made product of the present invention by proportioning and active hydrogen calcium oxide are composite.
A kind of production method of described compound color-odor removal coagulating agent is characterized in that: by the weight percent of described raw material, the sulfur waste acid concentration of Titanium White Production By Sulfuric Acid Process byproduct is transferred to 25～30% drops into reaction tank; Is content 85% magnesium oxide and ferrous sulfate, perhaps is content 85% magnesium oxide and brown iron oxide, adds reaction tank by proportioning; Heat is emitted in reaction, and the reflection time is 1～3 hour, and pH value is controlled at 7～8; After filtration liquid is mentioned concentration tank with acid proof pump, be heated to 250 ℃～300 ℃, concentrate 1～3 hour; Mention crystallizing pond again, the normal temperature crystallization time is 3～5 hours, and through dehydration, drying makes iron magnesium sulfate; Then the exsiccant iron magnesium sulfate is made product of the present invention by proportioning and active hydrogen calcium oxide are composite.
A kind of described compound color-odor removal coagulating agent is used for the technology that leather sewage is handled, and it is characterized in that: may further comprise the steps:
(1) leather sewage enters grating tank, solid matter and the fiber removed in the leather sewage by the filtering material of thickness prevent to enter in the subsequent technique, guarantee the stability of treatment system, solid refuse regularly packs outward transport, and leather sewage enters equalizing tank through after the grating tank;
(2) regulate through equalizing tank, make the leather sewage uniform mixing, play the pondage effect simultaneously; Leather sewage after equalizing tank is regulated enters coagulator;
(3) coagulator is made up of centrifugal pump of horizontal axis and dosing stirred pot, adds compound color-odor removal coagulating agent in coagulator, carries out flocculation reaction by centrifugal force, realizes mud-water separation to next step settling tank;
(4) waste water after handling enters settling tank, and post precipitation is realized mud-water separation, and top clear water enters neutralization tank, and mud can be back to coagulator, and mud that can not reuse drops into sludge sump and treats drying and other treatment;
(5) waste water of handling through settling tank enters neutralization tank, by adjusting pH value, makes various oxious components obtain degraded at neutralization tank, pH value control 6～9;
(6) from neutralization tank come out water enter contact-oxidation pool or bio-aeration pool, by aerobic bacteria, active sludge, remove organism and oxious component thereof at this; Perhaps from neutralization tank come out water enter filtering basin and filter the high-efficiency activated coke class filtering material of packing in the filtering basin;
(7) mud of discharging from equalizing tank, settling tank and neutralization tank is mentioned sludge sump with sludge pump, by mummification, press filtration method, mud is regularly transported to the comprehensive treating process station.
Be used for the technology that leather sewage is handled according to described compound color-odor removal coagulating agent, it is characterized in that: the back of contact-oxidation pool, bio-aeration pool or filtering basin increases the UF treater in processing step (6), the UF treater is a kind of membrane type molecular sieve, can reuse by the middle water of this device processes.
Performances such as compound color-odor removal coagulating agent of the present invention has highly effective coagulation, and pH value is applied widely, and the degradation rate height decolours flavor comprehensively, and is cheap.Problems such as the pH value scope of having filled up traditional coagulating agent existence is little, decolouring is low, consumption is big.It is a kind of good water-treated prod of initiating.
Compound color-odor removal coagulating agent of the present invention is used for the technology that leather sewage is handled, the main compound color-odor removal coagulating agent that uses, by coagulation, flocculation, at settling tank various oxious components are dropped to national GB8978-1996 below three grades, guarantee next link (as, the catalytic oxidation ditch, biochemical aeration tank) steady running.Guarantee that water outlet reaches GB8978-1996 primary standard and reuse.The said process dwell time of sewage reduces 2/3 than biochemical, physico-chemical process.Can reduce expenses, reduce investment.Compound color-odor removal coagulating agent of the present invention can be handled whole sewage of leather industry, guarantees stably reaching standard.
Description of drawings
Fig. 1 is the process flow sheet of first kind of embodiment of compound color-odor removal coagulating agent of the present invention.
Fig. 2 is the process flow sheet of second kind of embodiment of compound color-odor removal coagulating agent of the present invention.
Fig. 3 is the process flow sheet of the third embodiment of compound color-odor removal coagulating agent of the present invention.
Fig. 4 is used for the process flow sheet of first kind of embodiment of technology of leather sewage processing for compound color-odor removal coagulating agent of the present invention.
Fig. 5 is used for the process flow sheet of second kind of embodiment of technology of leather sewage processing for compound color-odor removal coagulating agent of the present invention.
Fig. 6 is used for the process flow sheet of the third embodiment of technology of leather sewage processing for compound color-odor removal coagulating agent of the present invention.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments:
Compound color-odor removal coagulating agent of the present invention is a kind of novel water-treated prod, it is with the mineral substance extraction that contains metal ions such as Mg, Fe, Si, Ca, polymerization and concentrated forming, again with contain can be with methoxyl group in the Chemicals, quinonyl, carbon back, amino, combining of sulfonic group isoreactivity group and the product that makes is a kind of composite macromolecule coagulant.
Performances such as compound color-odor removal coagulating agent has highly effective coagulation, and pH value is applied widely, and the degradation rate height decolours flavor comprehensively, and is cheap.Problems such as the pH value scope of having filled up traditional coagulating agent existence is little, decolouring is low, consumption is big.It is a kind of good water-treated prod of initiating.
One, compound color-odor removal coagulating agent coagulation mechanism
1, compound color-odor removal coagulating agent is a kind of chemical agent that can be used to effectively separate the tiny suspended particle that causes that water pollutes.The purpose of coagulation is to remove colloidalmaterial.Colloid surface generally has negative charge, repels mutually, presents the feature of pedesis, forms steady suspension.If add colloid or add the material that directly has positive charge, can in and the colloid surface electric charge, physical adsorption power.Thereby cause the cohesion of colloidalmaterial.For being difficult for isolating fine particle from water, can coagulation become and be easy to isolating flco, from water, separate.
Add the micro mist sorbent material in the compound color-odor removal coagulating agent.Sorbent material can act synergistically with coagulating agent, reaches the purpose of removing colloid and organic molecule dispersion state material.It comprises the solvay-type sorbent material, removes the sulfuration sulfonate and the polymkeric substance of heavy metal.
2, the most of dispersion system of organism (COD) is that two or more material mixes and formed system in the sewage disposal.According to the particulate size, the dispersion that the particle that distributes in water and the water is formed is: suspension, colloidal solution, true solution.
In water treatment, approach such as the organism that coagulating agent is removed organism and colloidal solid comprises mainly that net is caught, absorption, charge neutrality are taken off surely, precipitation.Remove suspended substance and organism in anhydrating.
3, compound color-odor removal coagulating agent at first adds the metal-salt through hydrolysis in former water, form flco with the sedimentation of quickening suspended matter.In the hydrolysis in positively charged ion and the water inorganic anion and organic anion active group by Effect of Electric Double Layer, bridging actions such as positively charged ion in the hydrolysis in negatively charged ion and the water and organism absorption, formation flocculating polymer body.Can remove through sedimentation and filtration.
Two, the specific embodiment of compound color-odor removal coagulating agent and production method
(1) first kind of embodiment of the present invention as shown in Figure 1, a kind of compound color-odor removal coagulating agent comprises that following raw materials by weight percent makes sal epsom:
Content is 85% magnesium oxide 20～50%;
The sulfuric acid of 25～30% concentration (raw material is selected the sulfur waste acid of Titanium White Production By Sulfuric Acid Process byproduct for use, and is as follows) 50～80%;
Then with the above-mentioned sal epsom that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Sal epsom 30%～55%;
Content is 98% active hydrogen calcium oxide 45%～70%.
Embodiment 1 (most preferred embodiment)
Compound color-odor removal coagulating agent comprises that following raw materials by weight percent makes sal epsom:
Content is 85% magnesium oxide 40%;
The sulfuric acid 60% of 30% concentration;
Then with the above-mentioned sal epsom that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Sal epsom 40%;
Content is 98% active hydrogen calcium oxide 60%.
The product that present embodiment makes, it is respond well to be used for municipal sewage treatment.
Embodiment 2 (, as follows) with reference to the manner of formulation of embodiment 1
Content is 85% magnesium oxide 35%;
The sulfuric acid 65% of 30% concentration;
Sal epsom 35%;
Content is 98% active hydrogen calcium oxide 65%.
Embodiment 3
Content is 85% magnesium oxide 30%;
The sulfuric acid 70% of 30% concentration;
Sal epsom 30%;
Content is 98% active hydrogen calcium oxide 70%.
The production method of above-mentioned compound color-odor removal coagulating agent by the weight percent of described raw material, is transferred to 25～30% with the sulfur waste acid concentration of Titanium White Production By Sulfuric Acid Process byproduct and is dropped into reaction tanks, is content that 85% magnesium oxide adds reaction tank by proportioning; Heat is emitted in reaction, and the reflection time is 1～3 hour, preferred 2 hours; After filtration liquid is mentioned concentration tank with acid proof pump, be heated to 250 ℃～300 ℃, preferred 280 ℃, concentrate 1～3 hour, preferred 2 hours; Mention crystallizing pond again, the normal temperature crystallization time is 3～5 hours, preferred 4 hours; Through dehydration, drying makes iron magnesium sulfate; Then the exsiccant iron magnesium sulfate is made product of the present invention by proportioning and active hydrogen calcium oxide are composite.
(2) second kind of embodiment of the present invention as shown in Figure 2, a kind of compound color-odor removal coagulating agent comprises that following raw materials by weight percent makes iron magnesium sulfate:
Content is 85% magnesium oxide 25～40%;
The sulfuric acid 50～70% of 25～30% concentration;
Ferrous sulfate (7 aqueous ferrous sulfates, as follows) 5～12%;
Then with the above-mentioned iron magnesium sulfate that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Iron magnesium sulfate 30%～45%;
Content is 98% active hydrogen calcium oxide 55%～70%.
Embodiment 4 (most preferred embodiment)
Compound color-odor removal coagulating agent comprises that following raw materials by weight percent makes iron magnesium sulfate:
Content is 85% magnesium oxide 35%;
The sulfuric acid 55% of 30% concentration;
Ferrous sulfate 10%;
Then with the above-mentioned iron magnesium sulfate that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Iron magnesium sulfate 40%;
Content is 98% active hydrogen calcium oxide 60%.
The product that present embodiment makes is used to print and dye, the wastewater treatment efficiency of food service industry is good.
Embodiment 5
Content is 85% magnesium oxide 30%;
The sulfuric acid 60% of 30% concentration;
Ferrous sulfate 10%;
Iron magnesium sulfate 30%;
Content is 98% active hydrogen calcium oxide 70%.
Embodiment 6
Content is 85% magnesium oxide 25%;
The sulfuric acid 68% of 30% concentration;
Ferrous sulfate 7%;
Iron magnesium sulfate 35%;
Content is 98% active hydrogen calcium oxide 65%.
The production method of above-mentioned compound color-odor removal coagulating agent is characterized in that: by the weight percent of described raw material, the sulfur waste acid concentration of Titanium White Production By Sulfuric Acid Process byproduct is transferred to 25～30% drops into reaction tank; Is content 85% magnesium oxide and ferrous sulfate, adds reaction tank by proportioning; Heat is emitted in reaction, and the reflection time is 1～3 hour, preferred 2 hours; PH value is controlled at 7～8; After filtration liquid is mentioned concentration tank with acid proof pump, be heated to 250 ℃～300 ℃, preferred 280 ℃; Concentrate 1～3 hour, preferred 2 hours; Mention crystallizing pond again, the normal temperature crystallization time is 3～5 hours, and preferred 4 hours, through dehydration, drying made iron magnesium sulfate; Then the exsiccant iron magnesium sulfate is made product of the present invention by proportioning and active hydrogen calcium oxide are composite.
(4) the third embodiment of the present invention as shown in Figure 3, a kind of compound color-odor removal coagulating agent comprises that following raw materials by weight percent makes iron magnesium sulfate:
Content is 85% magnesium oxide 20～35%;
The sulfuric acid 50～65% of 25～30% concentration;
Brown iron oxide (Fe
2O
3) 5～25%;
Then with the above-mentioned iron magnesium sulfate that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Iron magnesium sulfate 40%～55%;
Content is 98% active hydrogen calcium oxide 45%～60%.
Embodiment 7 (most preferred embodiment)
Compound color-odor removal coagulating agent comprises that following raw materials by weight percent makes iron magnesium sulfate:
Content is 85% magnesium oxide 30%;
The sulfuric acid 60% of 30% concentration;
Brown iron oxide 10%;
Then with the above-mentioned iron magnesium sulfate that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Iron magnesium sulfate 50%;
Content is 98% active hydrogen calcium oxide 50%.
The product that present embodiment makes, the wastewater treatment efficiency that is used for industries such as papermaking, plating, smelting is good.
Embodiment 8
Content is 85% magnesium oxide 25%;
The sulfuric acid 55% of 30% concentration;
Brown iron oxide 20%;
Iron magnesium sulfate 45%;
Content is 98% active hydrogen calcium oxide 55%.
Embodiment 9
Content is 85% magnesium oxide 20%;
The sulfuric acid 60% of 30% concentration;
Brown iron oxide 20%;
Iron magnesium sulfate 40%;
Content is 98% active hydrogen calcium oxide 60%.
The production method of above-mentioned compound color-odor removal coagulating agent by the weight percent of described raw material, is transferred to 25～30% with the sulfur waste acid concentration of Titanium White Production By Sulfuric Acid Process byproduct and is dropped into reaction tank; Is content 85% magnesium oxide and brown iron oxide, adds reaction tank by proportioning; Heat is emitted in reaction, and the reflection time is 1～3 hour, and preferred 2 hours, pH value was controlled at 7～8; After filtration liquid is mentioned concentration tank with acid proof pump, be heated to 250 ℃～300 ℃, preferred 280 ℃, concentrate 1～3 hour, preferred 2 hours; Mention crystallizing pond again, the normal temperature crystallization time is 3～5 hours, and drying made iron magnesium sulfate through dehydration in preferred 4 hours; Then the exsiccant iron magnesium sulfate is made product of the present invention by proportioning and active hydrogen calcium oxide are composite.
(5) contrast of compound color-odor removal coagulating agent and traditional product coagulating agent
Synopsis with traditional product coagulating agent (polymerize aluminum chloride, bodied ferric sulfate, Tai-Ace S 150, iron(ic) chloride, alum):
Three, compound color-odor removal coagulating agent is used for the technology that leather sewage is handled
It is by adding compound color-odor removal coagulating agent in coagulator that the present invention handles the leather sewage technology, the various oxious components of sewage are precipitated rapidly and obtains degraded, further removes by physics, biochemical link then, reaches processing intent.
(1) compound color-odor removal coagulating agent is used for the principle that leather sewage is handled
1, the source of sewage and principal pollutant
Leather production can be divided into wet practice and dry run two portions, and wet practice is mainly prepares workshop section and tanning workshop section; Dry run is mainly finishing workshop section, and waste water is mainly derived from this 3 workshop sections.Produce link and principal pollutant thereof and see Table one.
Table one:
| Workshop section | Production link | Principal pollutant |
| Prepare workshop section | Raw hide washing immersion fleshing degreasing depilation, liming deashing and softening washing pickling, degreasing | SS，COD，Cl - COD，Cl - S 2-, COD, grease S 2-, COD, grease PH, SS, COD, Cl -, NH3-N SS, COD, salt COD, grease PH, COD, fat |
| Tanning workshop section | In the tanning retanning and the dyeing and fat-liquoring water squeezing | PH, COD, Cr (III) neutral salt, colourity PH, COD, Cr (III), neutral salt COD SS, COD, chrominance C OD, grease COD, grease |
| Finishing workshop section | Spraying | COD |
Find out from table one, form by following several parts according to the production process leather waste water: high density Cl
-The raw hide washing water, contain Ca (OH)
2, Na
2The alkaline depilation liming waste water of S contains grease and saponified degreasing waste water thereof, contains Cr (III) chrome waste water and stuffing dyeing waste-water, and wherein with degreasing waste water, depilation liming waste water and Chrome Tanning Wastewater are polluted the most serious.
(2) leather sewage principal feature
1, because use a large amount of organic raw material, leather waste water is that high density contains phenol organic waste water.
2, waste water has higher colourity, mainly by containing efficient sterilizing effect dyestuff intermediate and being not easy to be caused by the auxiliary agent of aluminium salt or molysite coagulation.
3, waste water has stronger heavy metal toxicity, mainly is suitable for auxiliary agents such as sulfide, chromic salts and leaded, nickel and causes.
4, preparatory stage waste water contains grease, Cl
-Ionic concn is higher.
(3) conventional leather waste water treatment process and existing problems thereof:
1, as can be known: a. colourity height contains efficient sterilizing effect dyestuff intermediate, Cr (III), Pb, Ba, Na according to the principal feature of leather sewage
2S and Cl
-Has the efficient sterilizing effect Deng harmful ion, unfavorable biological bacteria growth.B. above-mentioned harmful ion can not form flocculation sediment with traditional coagulating agent.C. grease and protein can not reach complexing with aluminium salt or molysite formation colloid.
2, from the problems referred to above staging treating sewage as can be seen, be can not be separated by strictness and be difficult to operation, contain Cr
+ 3Be to transform Cr
+ 6, contain Cr
+ 3Waste water is big because of investing, and is unpractical so reclaim.
3,, be more difficult flocculation sediment as coagulating agent with aluminium salt or molysite because the big strong basicity that shows of leather sewage pH value fluctuation.
4, the growth of biological bacteria will be subjected to temperature controlling, and temperature need reach more than 5 ℃ and could effectively grow, and be to be difficult to operation winter in the north.
5, the COD≤900mg/L of its raw water quality.
(4) compound color-odor removal coagulating agent is used for the mechanism that leather sewage is handled:
Composite algorithm is handled the principle of leather sewage and is mainly used compound color-odor removal coagulating agent.By coagulation, flocculation, at settling tank various oxious components are dropped to national GB8978-1996 below three grades, guarantee next link (as, catalytic oxidation ditch, biochemical aeration tank) steady running.Guarantee that water outlet reaches GB8978-1996 primary standard and reuse.The said process dwell time of sewage reduces 2/3 than biochemical, physico-chemical process.Can reduce expenses, reduce investment.
Compound color-odor removal coagulating agent can be fast and Cl-, S
+ 2, Ba
+ 2, Pb
+ 2The formation inorganic sediment combines; And can be with Cr
+ 3Transform Cr
+ 6, make Cr total amount precipitation.Having to combine with grease and protein forms the saponified basic chemical bond that has; The chemical bond that can combine fast in addition with molecule intermediate (methoxyl group, charcoal base, quinonyl, amino, the sulfonic group etc.) active group in the multiple dyestuff.Form throw out through complexing and polymerization.
(5) compound color-odor removal coagulating agent is used for the technical process that leather sewage is handled
1, leather sewage treatment process embodiment 1
The leather sewage processing technological flow in the experience aspect leather waste water treatment technology and the construction, is selected the composite algorithm treatment process according to the characteristics technology of the present invention of this enterprise wastewater water quality, the water yield as shown in Figure 4.
(1) grating tank
Various leather sewages enter grating tank, and the solid matter and the fiber that are removed in anhydrating by the filtering material of thickness prevent to enter in the subsequent technique, guarantee the stability of treatment system.Solid refuse regularly packs outward transport, and sewage enters equalizing tank through after the grating tank.
(2) equalizing tank
Because waste water quality changes greatly, unfavorable subsequent disposal system is stable.Make the waste water uniform mixing, play certain pondage effect simultaneously.Equalizing tank is 1/4 design of water displacement per diem.
(3) coagulator
Owing to contain oxious component concentration height such as a large amount of suspended substances, organism, S, Cr, colourity in the water, add compound color-odor removal coagulating agent at this, carry out flocculation reaction by centrifugal force, realize mud-water separation to settling tank.Coagulator is made up of centrifugal pump of horizontal axis and dosing stirred pot, and specification is by the discharge decision.
(4) settling tank
Waste water after the processing enters settling tank, and post precipitation is realized mud-water separation, and top clear water enters neutralization tank, and mud can be back to medicine system 3 times.Mud that can not reuse drops into sludge sump and treats drying and other treatment.
The capacity of settling tank, per diem water displacement, gets final product again divided by sedimentation time divided by water discharge time.
(5) neutralization tank
The waste water of handling through settling tank enters neutralization tank, by adjusting pH value, makes various oxious components obtain degraded at neutralization tank.PH value control 6-9.The volume of neutralization tank is identical with settling tank.
(6) contact-oxidation pool (or bio-aeration pool)
From neutralization tank come out water enter contact-oxidation pool, by aerobic bacteria, active sludge, remove organism and oxious component thereof at this.Contact-oxidation pool can be with reference to SBR or CAST method.
(7) sludge treatment
Mention sludge sump from the mud that equalizing tank, settling tank and neutralization tank are discharged with sludge pump,, mud is regularly transported to the comprehensive treating process station by mummification, press filtration method.
(8) robot control system(RCS)
At Combined Processing process sewage flow process, in each link induction instrument is installed, enter after the program promptly self controllable.
Leather sewage treatment effect table of the present invention
| Project | PH value | COD(mg /L) | Colourity (doubly) | SS(mg/L) | NH3-N (mg/L) | Cl - (mg/L) | Cr (mg/L) | S (mg/L) |
| Water inlet | 5-11 | 5000 | 500 | 400 | 35 | 2000 | 35 | 300 |
| Equalizing tank | 5-10 | 4500 | 480 | 200 | 35 | 1800 | 32 | 200 |
| Clearance | 11％ | 10％ | 4％ | 50％ | 10％ | 85％ | 33％ | |
| Settling tank | 5-10 | 900 | 30 | 801 | 20 | 800 | 3 | 5 |
| Clearance | 80％ | 93.75％ | 60％ | 57％ | 56％ | 90％ | 97％ | |
| Neutralization tank | 6-9 | 800 | 20 | 60 | 18 | 400 | 2 | 2 |
| Clearance | 10％ | 11％ | 33％ | 25％ | 10％ | 50％ | 33％ | 60％ |
| Contact-oxidation pool | 6-9 | 100 | 20 | 50 | 15 | 200 | 1.5 | 0.5 |
| Clearance | 87.5％ | 16％ | 16％ | 50％ | 25％ | 75％ |
2, leather sewage treatment process embodiment 2
Embodiment 2 is basic identical with the flow process of embodiment 1, just bio-aeration pool is changed into filtering basin, the high-efficiency activated coke class filtering material of packing in the filtering basin.This technology mainly is applicable to leather whitewashing and the little handled thing of pollution level, and this technology working cost easy to operate is low.
3, leather sewage treatment process embodiment 3
Embodiment 3 and embodiment 1, embodiment 2 are basic identical, just increase the UF treater thereafter, and the UF treater is a kind of membrane type molecular sieve, can reuse by the middle water of this device processes.The UF treater is to determine specification of equipment according to water displacement.
Claims (10)
1, a kind of compound color-odor removal coagulating agent is characterized in that: comprise that following raw materials by weight percent makes sal epsom:
Content is 85% magnesium oxide 20～50%;
The sulfuric acid 50～80% of 25～30% concentration;
Then with the above-mentioned sal epsom that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Sal epsom 30%～55%;
Content is 98% active hydrogen calcium oxide 45%～70%.
2, compound color-odor removal coagulating agent according to claim 1 is characterized in that: comprise that following raw materials by weight percent makes sal epsom:
Content is 85% magnesium oxide 40%;
The sulfuric acid 60% of 30% concentration;
Then with the above-mentioned sal epsom that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Sal epsom 40%;
Content is 98% active hydrogen calcium oxide 60%.
3, compound color-odor removal coagulating agent according to claim 1 is characterized in that: comprise that following raw materials by weight percent makes iron magnesium sulfate:
Content is 85% magnesium oxide 25～40%;
The sulfuric acid 50～70% of 25～30% concentration;
Ferrous sulfate 5～12%;
Then with the above-mentioned iron magnesium sulfate that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Iron magnesium sulfate 30%～45%;
Content is 98% active hydrogen calcium oxide 55%～70%.
4, compound color-odor removal coagulating agent according to claim 3 is characterized in that: comprise that following raw materials by weight percent makes iron magnesium sulfate:
Content is 85% magnesium oxide 35%;
The sulfuric acid 55% of 30% concentration;
Ferrous sulfate 10%;
Then with the above-mentioned iron magnesium sulfate that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Iron magnesium sulfate 40%;
Content is 98% active hydrogen calcium oxide 60%.
5, compound color-odor removal coagulating agent according to claim 1 is characterized in that: comprise that following raw materials by weight percent makes iron magnesium sulfate:
Content is 85% magnesium oxide 20～35%;
The sulfuric acid 50～65% of 25～30% concentration;
Brown iron oxide 5～25%;
Then with the above-mentioned iron magnesium sulfate that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Iron magnesium sulfate 40%～55%;
Content is 98% active hydrogen calcium oxide 45%～60%.
6, compound color-odor removal coagulating agent according to claim 5 is characterized in that: comprise that following raw materials by weight percent makes iron magnesium sulfate:
Content is 85% magnesium oxide 30%;
The sulfuric acid 60% of 30% concentration;
Brown iron oxide 10%;
Then with the above-mentioned iron magnesium sulfate that makes by following weight percent, and active hydrogen calcium oxide preparation cost invention product:
Iron magnesium sulfate 50%;
Content is 98% active hydrogen calcium oxide 50%.
7, a kind of production method of compound color-odor removal coagulating agent as claimed in claim 1 or 2, it is characterized in that: by the weight percent of described raw material, the sulfur waste acid concentration of Titanium White Production By Sulfuric Acid Process byproduct being transferred to 25～30% dropping into reaction tanks, is content that 85% magnesium oxide adds reaction tank by proportioning; Heat is emitted in reaction, and the reflection time is 1～3 hour; After filtration liquid is mentioned concentration tank with acid proof pump, be heated to 250 ℃～300 ℃, concentrate 1～3 hour; Mention crystallizing pond again, the normal temperature crystallization time is 3～5 hours, and through dehydration, drying makes sal epsom; Then exsiccant sal epsom is made product of the present invention by proportioning and active hydrogen calcium oxide are composite.
8, a kind of production method as compound color-odor removal coagulating agent as described in the claim 3,4,5 or 6 is characterized in that: by the weight percent of described raw material, the sulfur waste acid concentration of Titanium White Production By Sulfuric Acid Process byproduct is transferred to 25～30% drops into reaction tanks; Is content 85% magnesium oxide and ferrous sulfate, perhaps is content 85% magnesium oxide and brown iron oxide, adds reaction tank by proportioning; Heat is emitted in reaction, and the reflection time is 1～3 hour, and pH value is controlled at 7～8; After filtration liquid is mentioned concentration tank with acid proof pump, be heated to 250 ℃～300 ℃, concentrate 1～3 hour; Mention crystallizing pond again, the normal temperature crystallization time is 3～5 hours, and through dehydration, drying makes iron magnesium sulfate; Then the exsiccant iron magnesium sulfate is made product of the present invention by proportioning and active hydrogen calcium oxide are composite.
9, a kind ofly be used for the technology that leather sewage is handled, it is characterized in that: may further comprise the steps as claim 1,2,3,4,5 or 6 described compound color-odor removal coagulating agents:
(1) leather sewage enters grating tank, solid matter and the fiber removed in the leather sewage by the filtering material of thickness prevent to enter in the subsequent technique, guarantee the stability of treatment system, solid refuse regularly packs outward transport, and leather sewage enters equalizing tank through after the grating tank;
(2) regulate through equalizing tank, make the leather sewage uniform mixing, play the pondage effect simultaneously; Leather sewage after equalizing tank is regulated enters coagulator;
(3) coagulator is made up of centrifugal pump of horizontal axis and dosing stirred pot, adds compound color-odor removal coagulating agent in coagulator, carries out flocculation reaction by centrifugal force, realizes mud-water separation to next step settling tank;
(4) waste water after handling enters settling tank, and post precipitation is realized mud-water separation, and top clear water enters neutralization tank, and mud can be back to coagulator, and mud that can not reuse drops into sludge sump and treats drying and other treatment;
(5) waste water of handling through settling tank enters neutralization tank, by adjusting pH value, makes various oxious components obtain degraded at neutralization tank, pH value control 6～9;
(6) from neutralization tank come out water enter contact-oxidation pool or bio-aeration pool, by aerobic bacteria, active sludge, remove organism and oxious component thereof at this; Perhaps from neutralization tank come out water enter filtering basin and filter the high-efficiency activated coke class filtering material of packing in the filtering basin;
(7) mud of discharging from equalizing tank, settling tank and neutralization tank is mentioned sludge sump with sludge pump, by mummification, press filtration method, mud is regularly transported to the comprehensive treating process station.
10, be used for the technology that leather sewage is handled according to the described compound color-odor removal coagulating agent of claim 9, it is characterized in that: the back of contact-oxidation pool, bio-aeration pool or filtering basin increases the UF treater in processing step (6), the UF treater is a kind of membrane type molecular sieve, by the middle water reuse of this device processes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100165342A CN101591054A (en) | 2009-06-17 | 2009-06-17 | Compound color-odor removal coagulating agent and production method and be used for the technology that leather sewage is handled |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100165342A CN101591054A (en) | 2009-06-17 | 2009-06-17 | Compound color-odor removal coagulating agent and production method and be used for the technology that leather sewage is handled |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105084509A (en) * | 2015-07-10 | 2015-11-25 | 张颖 | Purification treatment process for industrial waste liquid |
| CN105152289A (en) * | 2015-07-10 | 2015-12-16 | 郑宇欣 | Alkaline wastewater purification treatment agent |
| CN114368819A (en) * | 2020-10-14 | 2022-04-19 | 刘耀红 | Sewage decolorant and preparation method thereof |
| CN114369968A (en) * | 2020-10-14 | 2022-04-19 | 刘耀红 | Special agent for sludge papermaking and preparation method thereof |
-
2009
- 2009-06-17 CN CNA2009100165342A patent/CN101591054A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105084509A (en) * | 2015-07-10 | 2015-11-25 | 张颖 | Purification treatment process for industrial waste liquid |
| CN105152289A (en) * | 2015-07-10 | 2015-12-16 | 郑宇欣 | Alkaline wastewater purification treatment agent |
| CN114368819A (en) * | 2020-10-14 | 2022-04-19 | 刘耀红 | Sewage decolorant and preparation method thereof |
| CN114369968A (en) * | 2020-10-14 | 2022-04-19 | 刘耀红 | Special agent for sludge papermaking and preparation method thereof |
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Open date: 20091202 |