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47results about How to "Improve adsorption bridging effect" patented technology
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Method for preparing chitosan-like efficient flocculant
ActiveCN102977227ASignificant adsorption and bridging effectGood decolorizationWater/sewage treatment by flocculation/precipitationWater bathsAluminium sulfate
The invention discloses a method for preparing chitosan-like efficient flocculant, which comprises the following steps of: (1) pre-treatment of chitosan and derivatives of chitosan: dissolving chitosan and derivatives of chitosan in an acetic acid solution with pH value being 5, uniformly stirring, adding alkali until the pH value is 9 and chitosan separates out, and carrying out suction filtration for later use; (2) preparation of efficient flocculant: adding 1-2 parts of the pre-treated chitosan and derivatives of chitosan, 3-5 parts of cross-linking agents, 1 part of carbamide and 1.5-3 parts of aluminum sulfate in a four-port flask, stirring, pre-reacting for 0.5-1h in a water bath at 60-80 DEG C, then adding 3-8 parts of a dicyandiamide and carbamide mixed modifier, continuing to react for 2-4h, to obtain carbamide-chitosan-dicyandiamide like composite flocculant; and (3) purification of the product: after the reaction, separating out the product by using acetone; carrying out suction filtration; washing the product with ethanol; carrying out suction filtration, and drying in an oven at 90 DEG C for further use.
Owner:ZHEJIANG SILK TECH
Aluminum-zinc polysilicate composite flocculating agent and application thereof
InactiveCN105984929AImprove adsorption bridging effectGood decolorization effectWater/sewage treatment by neutralisationWater/sewage treatment by flocculation/precipitationTurbiditySODIUM SILICATE SOLN
The invention discloses an aluminum-zinc polysilicate composite flocculating agent and application thereof. Sodium silicate solution and excessive sulfuric acid are mixed with each other to prepare polysilicate solution, zinc sulfate and aluminum sulfate solution, polyacrylamide, calcium hydroxide and sodium hypochlorite are sequentially added into the polysilicate solution, and reaction is carried out to obtain the aluminum-zinc polysilicate composite flocculating agent. The aluminum-zinc polysilicate composite flocculating agent and the application have the advantages that the aluminum-zinc polysilicate composite flocculating agent can be applied to the field of water treatment, accordingly, excellent effects of removing colors, turbidity and carbon can be realized, coagulated floc particles are large, the aluminum-zinc polysilicate composite flocculating agent is high in floc settling velocity, excellent net capturing effects can be realized, and the excellent effects of removing the colors and the turbidity can be realized; raw materials for the aluminum-zinc polysilicate composite flocculating agent can come from wide sources, the aluminum-zinc polysilicate composite flocculating agent is easy to prepare and can be widely applied to the field of wastewater from dyeing and printing and papermaking industries and the like and the field of advanced municipal sewage treatment, and the like.
Owner:NANJING UNIV +1
Organic-inorganic hybrid flocculant and preparation method thereof
ActiveCN103351047AGive full play to the role of adsorption and bridgingImprove adsorption bridging effectWater/sewage treatment by flocculation/precipitationAluminium chlorideSulfate radicals
The invention discloses an organic-inorganic hybrid ionic bond efficient flocculant which is characterized in that an initiator, namely ammonium persulfate is added in a DMDAAC (dimethyl diallyl ammonium chloride) polymerization process to allow a molecular chain end of a composited polymer, namely PDMDAAC (poly dimethyl diallyl ammonium chloride) to be provided with sulfate radicals, the sulfate radicals are bonded with hydroxy aluminium ions with positive charge in an ionic bond form, and the PAC (poly aluminium chloride)-PDMDAAC organic-hybrid ionic bond efficient flocculant is obtained, and fully exerts excellent charge neutralizing capacity of PAC and an adsorption bridging action of PDMDAAC. In a water treatment process, the PAC-PDMDAAC hybrid flocculant is less in dosing quantity, and a formed flocculating body is quick in sedimentation, large and compact, so that the water treatment efficiency is improved significantly.
Owner:CHONGQING UNIV
Organic-inorganic composite flocculant used for treating dyeing waste water and its preparation method and using method
InactiveCN101125698AAvoid secondary pollutionEasily biodegradableWaste water treatment from textile industryWater/sewage treatment by flocculation/precipitationWater bathsDyeing wastewater
The invention discloses an organic-inorganic composite flocculant for the use of processing printing and dyeing wastewater and a preparation method and a utilization method thereof. The organic-inorganic composite flocculant takes soluble aluminum salt, ferric salt and corn starch as raw materials, and takes sulfate and calcium hydroxide as reaction auxiliary agent. The specific preparation procedures are that: firstly, a 6-20 percent of starch solution is made of the corn starch, then alkali liquor produced by a mass ratio of 6-15:1 between the starch and the alkali is added slowly and with even pace into the water of 40-90 DEG C and modified for 1-8 hours; then the modified starch solution is added into the aluminum salt and ferric salt solution by a mass ratio of 0.25-1:0.02-0.5:1 between the aluminum, iron and starch, the pH value is adjusted to be 1.0-4.0, and the composite flocculant is acquired after the complex reaction under a temperature condition of 40-90 DEG C for 2-5 hours. The flocculant preparation method of the invention is simple, and is convenient in utilization, with little dosing quantity of the reagents required, high removing rate of CODCr and high decoloration rate, easily biodegradable biodegradation.
Owner:SUN YAT SEN UNIV
Enteromorpha flocculant and preparation process thereof
InactiveCN102417225AReduce turbiditySimple production processWater/sewage treatment by flocculation/precipitationIonChemistry
The invention relates to an enteromorpha flocculant and a preparation process thereof. The preparation process comprises the following steps that: a raw material enteromorpha is dried and crushed; the enteromorpha and deionized water are mixed according to a mass ratio of 1:70-75, and are stirred and extracted in an 85-90 DEG C constant-temperature water bath for 3-4 hours; and an extract is centrifugally separated, and a supernatant is diluted by adding an equal volume of deionized water to obtain the enteromorpha flocculant. The enteromorpha flocculant is applied to the coagulation treatment of water, so that the turbidity of water can be reduced, and the organic matter in the water can be removed. The enteromorpha flocculant has a simple and quick production process, a wide applicationrange and safety and nontoxicity, and a new way of thinking is provided for the reutilization technology of disaster green algae.
Owner:SHANDONG UNIV
Composite polyaluminum silicate chloride and preparation method thereof
InactiveCN102092827AStrong electrical neutralization abilityEnhanced adsorption and bridging abilityWater/sewage treatment by flocculation/precipitationAluminium chlorohydrateAluminium chloride
The invention discloses composite polyaluminum silicate chloride and a preparation method thereof, belonging to the technical field of preparation of inorganic composite macromolecular flocculants. The composite polyaluminum silicate chloride is prepared by the steps of curing traditional polymeric aluminium chloride at high temperature and compositing with active silica sol, and has the nano Al30 content between 10% and 40%, wherein the proportion of silicon to aluminum is between 0.02-0.5. The composite polyaluminum silicate chloride can exert the high-efficiency electrical neutralization capability of the Al30 and exert a better flocculation effect due to the enhanced adsorption bridging capability, and is beneficial to broadening of application range of flocculants.
Owner:TSINGHUA UNIV
Mineral leaching process of bastnaesite
ActiveCN103555943ASave waterIncrease concentrationProcess efficiency improvementSodium hydroxideMaterials science
The invention discloses a mineral leaching process of bastnaesite. The mineral leaching process comprises the following steps of: (1) leaching bastnaesite with hydrochloric acid for the first time, and adding a flocculating agent to obtain first leaching residue and first leaching liquid; (2) performing alkaline transfer on the first leaching residue obtained in step (1) by using sodium hydroxide to obtain alkaline transfer residue; (3) leaching the alkaline transfer residue obtained in step (2) by hydrochloric acid for the second time, and adding the flocculating agent to obtain second leaching liquid and second leaching residue; (4) washing the secondary leaching residue obtained in step (3) by using clean water to obtain secondary leaching residue washing water; (5) preparing the flocculating agents used in step (1) and (3) through the secondary leaching residue washing water obtained in step (4); (6) mixing the first leaching liquid obtained in step (1) and the second leaching liquid obtained in step (3); and extracting and separating rare earth. The mineral leaching process is mainly applied to bastnaesite.
Owner:LESHAN SHENGHE RARE EARTH CO LTD
Process for preparing wet type paint coagulating agent and its application
InactiveCN1594129ALong-term safe operationLong runWater/sewage treatment by flocculation/precipitationWater solubleSilicon
The invention provides a process for preparing wet type paint coagulating agent and its application, wherein an inorganic macromolecular substance I containing silicon and metallic ions is mixed with water-soluble low molecular condensate II by the proportion of 95:5-5:95, and stabilizing agents is charged in. The use consists of mixing with circulating water amounting to 400-3000ppm or excess spray paint amounting to 1:5-1:15, the contact reaction time being 5-20 minutes.
Owner:GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
Sewage treatment flocculant and preparation method thereof
InactiveCN105384227AGood removal effectImprove surface activityWater/sewage treatment by flocculation/precipitationDiethylenetriamineAmmonium chloride mixture
The invention discloses a sewage treatment flocculant. The sewage treatment flocculant comprises the following raw materials in parts by weight: 105-115 parts of xylogen, 75-82 parts of propyl aldehyde, 26-29 parts of diethylenetriamine, 35-38 parts of sodium hydroxymethanesulfonate, 580-600 parts of isopropanol, 12-15 parts of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride, 25-28 parts of polymeric aluminum ferric sulfate, 12-15 parts of alum, 23-26 parts of polymeric ferric chlorosulfate and 25-28 parts of polyacrylic acid. The invention further discloses a preparation method of the sewage treatment flocculant. The sewage treatment flocculant is applied to the treatment of heavy metal sewage, the flocculating performance is good, the removal effect of heavy metals is good, and the scaling can be prevented.
Owner:合肥安奎思成套设备有限公司
Polyaluminum ferric chloride-polyepichlorohydrin-ethylene diamine preparation method
InactiveCN103408120AHigh molecular weightImprove stabilityWater/sewage treatment by flocculation/precipitationEthylene diamineAluminium chloride
The invention relates to a polyaluminum ferric chloride-polyepichlorohydrin-ethylene diamine preparation method comprising the steps that: (1) a polyepichlorohydrin-ethylene diamine solution is prepared; (2) a polyaluminum ferric chloride solution is prepared; and (3) the prepared polyepichlorohydrin-ethylene diamine solution and the polyaluminum ferric chloride solution with a weight ratio of 1:20-1:50 are subjected to ultrasonic oscillation in an ultrasonic wave generator, such that polyaluminum ferric chloride-polyepichlorohydrin-ethylene diamine flocculant is prepared. According to the invention, epichlorohydrin, ethylene diamine, aluminum chloride and iron chloride are adopted as raw materials, and the polyaluminum ferric chloride-polyepichlorohydrin-ethylene diamine is prepared. The flocculant is a novel inorganic-organic high-molecular flocculant. As a high-efficiency water-processing agent, the flocculant can be widely applied in dye wastewater processing, and has advantages such as high molecular weight, good stability, good decolorizing effect, and the like.
Owner:SHANDONG JIANZHU UNIV
Chemical adsorbent for processing heavy metal waste water
PendingCN109019741AReduce dosageEasy to handleWater contaminantsWater/sewage treatment using germicide/oligodynamic-processIron powderSorbent
The invention provides a chemical adsorbent for processing heavy metal waste water. The Chemical adsorbent for processing heavy metal waste water comprises the following components in parts by mass: 5to 25 parts of calcium oxide, 15 to 40 parts of an inorganic polymer flocculant, 1 to 25 parts of sulfur-containing iron powder, 3 to 30 parts of sodium percarbonate, and 1 to 10 parts of an organicpolymer flocculant. The adsorbent of the invention is simple to use and operate, the conditions are easy to control, the dosage of the medicament is small, and the sedimentation speed is fast.
Owner:OCHEMATE MATERIAL TECH CO LTD
Coagulate method of water treatment purifying technology
InactiveCN1524801AHigh strengthImprove stabilityWater/sewage treatment by flocculation/precipitationAqueous solutionWater temperature
The invention relates to a coagulation process in water treatment purification technology, wherein metal salt flocculating agent and aquadrate starch are mixed in the form of water solution, and are charged into the water to be processed, the aquadrate, dried maize starch and water solution are mixed for mixing reaction for 3-4 hours under the temperature condition of 90-100 deg. C. The invention realizes fine water purification effect and less influence from water temperature.
Owner:WUHAN UNIV OF TECH
Industrial wastewater purification system for lithium battery
InactiveCN108675568AAvoid pollutionSimple processTreatment with aerobic and anaerobic processesMultistage water/sewage treatmentFlocculationOxygen
The invention relates to an industrial wastewater purification system for a lithium battery. The system comprises an acid-base neutralization unit, a coagulation, flocculation and precipitation unit,a facultative membrane bioreaction unit, a lithium battery production wastewater storage tank, an alkaline wastewater storage tank, an acid wastewater storage tank and a domestic wastewater storage tank. According to the system, a mode of combining the acid-base neutralization unit, the coagulation, flocculation and precipitation unit and the facultative membrane bioreaction unit is adopted, so that the biodegradability of lithium battery wastewater is improved, and a process is simple and the cost is reduced; in addition, treatment of three kinds of wastewater produced by a lithium battery production enterprise is organically combined, so that the three kinds of wastewater can be treated at the same time, the process is simplified, repeated input of equipment and medicaments is reduced and the running cost is reduced; moreover, the acid-base neutralization unit in the system is only used for simple neutralization without any additional medicaments, then acid-base conditioning is performed on the lithium battery production wastewater by use of the remaining acid-base property of the neutralized wastewater and an acid-base conditioner is appropriately added, so that input of the equipment and the medicaments is reduced, and production procedures are also reduced.
Owner:苏州爱源环境工程技术服务有限公司
Efficient sewage treatment flocculant and preparation method thereof
InactiveCN105314722AImprove surface activityGood removal effectWater/sewage treatment by flocculation/precipitationAluminium chlorideChemistry
The invention discloses an efficient sewage treatment flocculant which comprises the following raw materials in parts by weight: 100-110 parts of lignin, 70-80 parts of propionaldehyde, 25-30 parts of triethylene tetramine, 32-35 parts of formaldehyde sodium bisulfite addition compound, 600-620 parts of normal propyl alcohol, 10-12 parts of glycidyl trimethyl ammonium chloride, 23-26 parts of poly-ferric aluminum sulfate, 25-28 parts of PPFC, 4-8 parts of aluminium chloride and 22-26 parts of sodium polystyrene sulfonate. The invention further discloses a preparation method of the efficient sewage treatment flocculant. The efficient sewage treatment flocculant obtained through the preparation method is excellent in flocculating performance and heavy metal removal effect and can prevent scaling.
Owner:合肥安奎思成套设备有限公司
Preparation method of composite flocculant
InactiveCN103395870AImprove conversion rateHigh molecular weightWater/sewage treatment by flocculation/precipitationUltrasonic generatorHigh polymer
The invention relates to a preparation method of a composite flocculant, which comprises the following steps: (1) preparing a polyepoxy chloropropane-ethylenediamine solution; (2) preparing a polyaluminum chloride solution; and (3) putting the polyepoxy chloropropane-ethylenediamine solution and the polyaluminum chloride solution in a weight ratio of 1:20-1:50 into an ultrasonic generator, and carrying out ultrasonic vibration to prepare the polyaluminum chloride-polyepoxy chloropropane-ethylenediamine composite flocculant. The polyaluminum chloride-polyepoxy chloropropane-ethylenediamine composite flocculant is prepared from the epoxy chloropropane, ethylenediamine and aluminum chloride. The flocculant belongs to a novel inorganic-organic high polymer flocculant, can be widely used as an efficient water treatment reagent for dyeing wastewater treatment, and has the advantages of high molecular weight, high stability, favorable decolorization effect and the like.
Owner:SHANDONG JIANZHU UNIV
Pig farm wastewater enhanced flocculation method
PendingCN107500391AImprove removal efficiencyImprove efficiencyWater contaminantsClimate change adaptationPig farmsWater baths
The invention discloses a preparation method of a starch-based composite flocculant. The preparation method comprises: dissolving starch in water to obtain a 10-20% starch solution, slowly adding NaOH to the 50-60 DEG C water bath at a uniform speed according to a mass ratio of the NaOH to the starch of 1:8-12, and carrying out a stirring reaction for 40-80 min to obtain a modified starch solution; adjusting the pH value of the modified starch solution to 2.0-3.5 with sulfuric acid; and adding polysilicate ferric to the modified starch solution according to a ratio of the starch to the polysilicate ferric of 0.25-0.5:1, maintaining the pH value at 2.0-3.0, carrying out a reaction for 3.5-4.5 h in a 50-60 DEG C constant temperature oscillator, and standing overnight so as to age. According to the present invention, the starch-based composite flocculant has characteristics of no toxicity and no residue, has the SS removal efficiency of more than 90%, and has the COD removal efficiency of more than 60%, wherein the treatment cost is 0.2 yuan / m<3>, and the separated pig manure can further be directly used as the fertilizer for fruit trees and forest, and can be used as the raw material of the organic fertilizer.
Owner:汕尾市现代畜牧产业研究院 +3
Composite cationic polyacrylamide flocculant and preparation method thereof
PendingCN111573811AEnhance flocculation and sedimentation abilityHigh degree of polymerizationWater/sewage treatment by flocculation/precipitationPolyacrylamideDegree of polymerization
The invention provides a composite cationic polyacrylamide flocculant and a preparation method thereof. The composite cationic polyacrylamide flocculant comprises the following raw materials in partsby weight: 50-80 parts of starch polyacrylamide, 20-50 parts of activated silicic acid, 0.9-2 parts of liquid polyaluminum chloride, 0.1-0.5 part of a stabilizer, 7-12 parts of zinc sulfate, 7-12 parts of magnesium sulfate and 1-5 parts of a borax solution. In the present invention, the activated silicic acid can increase the polymerization degree of the polyaluminium chloride and adjust the internal charge structure of the polyaluminium chloride; the activated silicic acid interacts with aluminum ions in the system to generate larger polymer (polyaluminum silicate chloride), and the polyaluminum silicate chloride simultaneously has three functions of electrostatic neutralization, adsorption bridging and net capture in the wastewater treatment process, so that the flocculation settling capacity of the composite flocculant is enhanced, and the obtained flocculant is relatively moderate in price and relatively high in cost performance.
Owner:中科乐美科技集团有限公司
New composite ethyl orthosilicate-polyaluminium chloride flocculant preparation method
InactiveCN104909440AHigh efficiency electricityEfficient abilityWater/sewage treatment by flocculation/precipitationAluminium chlorohydrateSilicon
The invention discloses a new composite ethyl orthosilicate-polyaluminium chloride flocculant preparation method. Through high temperature curing processing of traditional polyaluminium chloride, higher content of aluminum 30 form can be obtained, during curing, ethyl orthosilicate is introduced, and a new composite ethyl orthosilicate-polyaluminium chloride flocculant product is synthesized; the new composite ethyl orthosilicate-polyaluminium chloride flocculant product contains high content of nano aluminum 30 and silicon sol, can play efficient electricity neutralization capability of the aluminum 30, and can play the adsorption bridge enhancement capacity of the silicon sol, better effect of coagulation can be achieved, the use range of the flocculant can be broadened, and the problems of not good flocculation effect and narrow feed dose range of the traditional polyaluminium chloride flocculant can be solved.
Owner:NANTONG UNIVERSITY
Preparation method of polyepichlorohydrin-ethanediamine decolorizing agent
InactiveCN103483550AImprove conversion rateReduce the impactWater/sewage treatment by flocculation/precipitationEthylenediamineParaffin wax
The invention discloses a preparation method of a polyepichlorohydrin-ethanediamine decolorizing agent. The preparation method comprises the following steps: (1), taking and placing liquid paraffin in a four-port round bottom with a stirrer, a thermometer and a reflux condenser, and controlling the temperature to 0 DEG C-8 DEG C; (2), introducing nitrogen gas in the liquid paraffin, adding ethidene diamine in a container, heating up while stirring, controlling the temperature to 20 DEG C-25 DEG C, and slowly dropwise adding polyepichlorohydrin to carry out addition reaction; (3), continuously stirring for thermal reaction after dropwise adding chloropropane, and cooling the temperature to 15 DEG C; (4), taking 33% trimethylamine as a cross-linking agent to add into liquor, and reacting for 5 hours at 85 DEG C-90 DEG C; (5), cleaning a solid product by methylbenzene, cleaning by alcohol and water, vacuum-drying at 60 DEG C and grinding to obtain polyepichlorohydrin-ethanediamine. According to the preparation method, polyepichlorohydrin-ethanediamine is prepared by using polyepichlorohydrin and ethanediamine as materials and introducing a small amount of trimethylamine cross-linking agent, and has the advantages of high molecular weight, good stability, good decolorizing effect and the like.
Owner:SHANDONG JIANZHU UNIV
Preparation method of polysilicate metal salt-hollow porous silicon dioxide composite flocculant used for water treatment
InactiveCN111762860AImprove adsorption capacityHigh removal rateWater/sewage treatment by flocculation/precipitationMicrosphereSilicic acid
The invention relates to the technical field of flocculants, and discloses a preparation method of a polysilicate metal salt-hollow porous silicon dioxide composite flocculant used for water treatment. The preparation method comprises the following steps: 1) preparing a sodium silicate solution, and adjusting the pH value of the sodium silicate solution to 3.0-4.0 for later use; 2) adding hollow porous silicon dioxide composite microspheres into the solution obtained in the step 1), carrying out uniform stirring and mixing, and then successively conducting stirring, curing and standing to obtain a composite polysilicic acid solution; and 3) weighing aluminum sulfate octadecahydrate and calcium chloride dihydrate in proportion, adding the weighed substances into distilled water, carrying out stirring and dissolving to obtain a mixed solution, dropwise adding the mixed solution into the composite polysilicic acid solution obtained in the step 2), and successively conducting stirring, curing and standing to obtain the polysilicate metal salt-hollow porous silicon dioxide composite flocculant. The flocculant prepared by the method has an excellent flocculation effect on impurity particles in water, and formed flocs are good in compactness and convenient to separate and operate.
Owner:陈超
Composite polyaluminum silicate chloride and preparation method thereof
InactiveCN102092827BImprove adsorption bridging effectImprove coagulation performanceWater/sewage treatment by flocculation/precipitationAluminium chlorideFlocculation
The invention discloses composite polyaluminum silicate chloride and a preparation method thereof, belonging to the technical field of preparation of inorganic composite macromolecular flocculants. The composite polyaluminum silicate chloride is prepared by the steps of curing traditional polymeric aluminium chloride at high temperature and compositing with active silica sol, and has the nano Al30 content between 10% and 40%, wherein the proportion of silicon to aluminum is between 0.02-0.5. The composite polyaluminum silicate chloride can exert the high-efficiency electrical neutralization capability of the Al30 and exert a better flocculation effect due to the enhanced adsorption bridging capability, and is beneficial to broadening of application range of flocculants.
Owner:TSINGHUA UNIV
Mineral leaching process of bastnaesite
ActiveCN103555943BEasy to handleImprove efficiencyProcess efficiency improvementRare earthSodium hydroxide
The invention discloses a mineral leaching process of bastnaesite. The mineral leaching process comprises the following steps of: (1) leaching bastnaesite with hydrochloric acid for the first time, and adding a flocculating agent to obtain first leaching residue and first leaching liquid; (2) performing alkaline transfer on the first leaching residue obtained in step (1) by using sodium hydroxide to obtain alkaline transfer residue; (3) leaching the alkaline transfer residue obtained in step (2) by hydrochloric acid for the second time, and adding the flocculating agent to obtain second leaching liquid and second leaching residue; (4) washing the secondary leaching residue obtained in step (3) by using clean water to obtain secondary leaching residue washing water; (5) preparing the flocculating agents used in step (1) and (3) through the secondary leaching residue washing water obtained in step (4); (6) mixing the first leaching liquid obtained in step (1) and the second leaching liquid obtained in step (3); and extracting and separating rare earth. The mineral leaching process is mainly applied to bastnaesite.
Owner:LESHAN SHENGHE RARE EARTH CO LTD
Sewage treatment system and method for treating sewage by using sewage treatment system
InactiveCN110102110AAchieve recyclingEasy to solveTreatment involving filtrationMultistage water/sewage treatmentFlocculationWater discharge
The invention discloses a sewage treatment system. The sewage treatment system comprises a purifying tank, a partition plate flocculation bin and an annular water filter, wherein a drain outlet is formed in the bottom of the purifying tank; the partition plate flocculation bin is located in the purifying tank, an opening used for introducing sewage and a coagulant is formed in the partition plateflocculation bin, a space used for a sewage flocculation reaction is formed in the partition plate flocculation bin, and an outlet is formed in the lower portion of the partition plate flocculation bin; the outer wall of the annular water filter is attached to the inner wall of the purifying tank, a water discharging outlet is formed in the annular water filter and communicated with the outer portion of the purifying tank, a continuous sawtooth type water inlet is formed in the inner wall of the annular water filter, a filter screen is arranged to cover the water inlet, and a buffering space is formed between the inner wall and the outer wall of the annular water filter. The invention further discloses a method for treating the sewage by using the sewage treatment system. The sewage is mixed with a coagulant solution through the purifying tank, colloid particles and tiny suspended solids in the sewage are coagulated into separable flocs, by using the sedimentation principle, it is quickly and effectively achieved that colloid is precipitated and purified water is separated, and recycling of a water source is ahcieved.
Owner:中铁隧道局集团建设有限公司
Preparation method of hydrophobic Arabic gum flocculant for antibiotic treatment
InactiveCN111662411AHigh molecular weightGood water solubilityWater/sewage treatment by flocculation/precipitation(Hydroxyethyl)methacrylateMeth-
The invention discloses a preparation method of a hydrophobic Arabic gum flocculant for antibiotic treatment, which is characterized in that Arabic gum, acrylamide (AM) and hydroxyethyl methacrylate (HEMA) are used as raw materials in the method; by adding Arabic gum into distilled water to prepare an aqueous solution, then sequentially adding AM and HEMA until AM and HEMA are completely dissolved, slowly dropwise adding a surfactant cetyl trimethyl ammonium bromide (CTAB) under the condition of stirring, water bath and heating, and then adding an initiator ceric ammonium nitrate, placing thereactor in a closed stainless steel (SUS316) chamber equipped with a vacuum line, and introducing F2 of a certain pressure into the reactor for fluorination induction; and sealing the reactor after the induction is finished, heating in a water bath under a stirring condition to initiate a polymerization reaction, and curing and purifying to obtain the hydrophobic Arabic gum flocculant for antibiotic treatment. The method is stable in reaction and easy to control, and the obtained hydrophobic Arabic gum is good in solubility and excellent in antibiotic treatment effect and has a good application prospect.
Owner:CHONGQING TECH & BUSINESS UNIV
Efficient flocculating agent for papermaking wastewater treatment and preparation method thereof
InactiveCN109052601ASimple manufacturing methodReduce dependenceWaste water treatment from plant processingWater/sewage treatment by flocculation/precipitationAluminium chlorideEnvironment effect
The invention provides a preparation method for an efficient flocculating agent for papermaking wastewater treatment. The preparation method comprises the following steps: (I) preparing acrylamide copolymer; (II) preparing ionic type acrylamide copolymer; (III) preparing 2-naphthylamine-3,6,8-trisulfonic acid modified ion type acrylamide copolymer; (IV) preparing polydimethoxysilane modified 2-naphthylamine-3,6,8-trisulfonic acid modified ion type acrylamide copolymer; and (V) performing ion exchange with aluminium chloride. The invention further discloses the efficient flocculating agent forpapermaking wastepaper treatment, prepared by the preparation method. The efficient flocculating agent for papermaking wastepaper treatment has the advantages of being low in cost, high in flocculating and precipitating efficiency, good in effect, less in dosage, small in environmental influence, good in performance stability, and green and environment-friendly in use.
Owner:NINGBO DIYANG ELECTRONICS TECH
Method for preparing chitosan-like efficient flocculant
ActiveCN102977227BSignificant adsorption and bridging effectGood decolorizationWater/sewage treatment by flocculation/precipitationWater bathsAluminium sulfate
The invention discloses a method for preparing chitosan-like efficient flocculant, which comprises the following steps of: (1) pre-treatment of chitosan and derivatives of chitosan: dissolving chitosan and derivatives of chitosan in an acetic acid solution with pH value being 5, uniformly stirring, adding alkali until the pH value is 9 and chitosan separates out, and carrying out suction filtration for later use; (2) preparation of efficient flocculant: adding 1-2 parts of the pre-treated chitosan and derivatives of chitosan, 3-5 parts of cross-linking agents, 1 part of carbamide and 1.5-3 parts of aluminum sulfate in a four-port flask, stirring, pre-reacting for 0.5-1h in a water bath at 60-80 DEG C, then adding 3-8 parts of a dicyandiamide and carbamide mixed modifier, continuing to react for 2-4h, to obtain carbamide-chitosan-dicyandiamide like composite flocculant; and (3) purification of the product: after the reaction, separating out the product by using acetone; carrying out suction filtration; washing the product with ethanol; carrying out suction filtration, and drying in an oven at 90 DEG C for further use.
Owner:ZHEJIANG SILK TECH
Sewage treatment precipitator
PendingCN114835226AFast flocculation and sedimentationGood flocculation and sedimentation effectSustainable biological treatmentWater/sewage treatment by flocculation/precipitationSulfate radicalsAlkaline earth metal
The invention relates to the field of environmental protection, in particular to a sewage treatment precipitator. The sewage treatment precipitant comprises a phosphate precipitant, an organic polymer, monohydric alcohol, alkaline earth metal ions and a stabilizer, the phosphate precipitant comprises at least one of Fe (II)-X, Al-X or a polymer of the Fe (II)-X and the Al-X; wherein X is independently selected from oxygen, halogen, sulfate radical or nitrate radical; the content of the monohydric alcohol is 3-24% by taking the total weight of the sewage treatment precipitator as 100%. The sewage treatment precipitant is high in flocculent precipitation speed, good in adsorption bridging performance on suspended solids and dissolved matters in a water body, good in comprehensive flocculent precipitation effect, capable of treating more sewage under the condition of small dosage, beneficial to saving economic cost and wide in application range.
Owner:北京博泰至淳生物科技有限公司 +1
Lacquer mist coagulant and its preparation and application
InactiveCN1974429BImprove adsorption bridging effectLow costWater/sewage treatment by flocculation/precipitationSolvent basedNitrogen
The present invention discloses one kind of lacquer mist coagulant with excellent viscosity reducing and coagulating effect on both solvent and water thinned paint. The lacquer mist coagulant consists of nitrogen-contain linear polymer and amphoteric metal salt in the weight ratio of 1 to 0.1-1 to 20. The present invention also provides the preparation process of the lacquer mist coagulant, and the preparation process is simple, low in cost and high in yield. The lacquer mist coagulant of the present invention is applied in treating circular water of wet lacquer mist eliminating system.
Owner:SHANGHAI LICHANG ENVIRONMENTAL ENG
A crown ether-based flocculant for papermaking wastewater treatment and preparation method thereof
ActiveCN109231397BSimple manufacturing methodRaw materials are easy to getWaste water treatment from plant processingWater/sewage treatment by flocculation/precipitationFlocculationSludge
The invention provides a method for preparing a flocculant based on crown ether for papermaking wastewater treatment, comprising the following steps: S1 preparation of polymerized betaine, S2 preparation of crown ether-based acrylamide copolymer, S3 surface modification of graphene oxide Preparation, S4 preparation of crown ether-based flocculant for papermaking wastewater treatment. The invention also discloses a crown ether-based flocculant for treating papermaking wastewater prepared according to the preparation method. The preparation method disclosed by the invention is simple and easy, the raw materials are easy to obtain, the dependence on equipment is not high, and it is suitable for large-scale production. The prepared flocculant for papermaking wastewater treatment based on crown ether has high intrinsic viscosity and strong adsorption and bridging ability , Small dosage, good flocculation effect, wide application range, less sludge generated, fast flocculation speed, stable performance, safe and environmentally friendly use.
Owner:XINXIANG BOYUAN WATER PURIFYING MATERIALS CO LTD
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