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30results about How to "Reduce water treatment costs" patented technology
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Treatment of arsenic-contaminated water using akaganeite adsorption
InactiveUS7314569B2Reduce water treatment costsIron oxides/hydroxidesWater contaminantsWater useFiltration
The present invention comprises a method and composition using akaganeite, an iron oxide, as an ion adsorption medium for the removal of arsenic from water and affixing it onto carrier media so that it can be used in filtration systems.
Owner:ARROWHEAD CENT
Acid pickling method for hot rolled 304 Austenitic stainless steel
The invention relates to an acid pickling method for hot rolled 304 Austenitic stainless steel. The acid pickling method comprises the steps of pretreatment, sulfuric acid pickling, mixed acid pickling for a first section, mixed acid pickling for a second section and mixed acid pickling for a third section. A mixed acid solution used in the steps of acid pickling for the three sections is formed by mixing nitric acid and fluorosilicic acid. According to the acid pickling method for the hot rolled 304 Austenitic stainless steel, the mixed acid solution formed by mixing nitric acid and fluorosilicic acid is adopted, H2SiF6 has a high ability to dissolve and corrode scale cinder and a metal matrix as HF, and therefore the acid pickling efficiency can be improved. In the acid pickling process, the activity of the acid solution is basically constant, and the service life of the acid solution is prolonged; in this way, the discharge amount of waste acid is reduced, and production cost and water treatment cost are reduced. In the mixed acid pickling process, fluoride sediment will not be generated, a pipeline will not be blocked, and the halt maintenance frequency is reduced.
Owner:WISDRI ENG & RES INC LTD
Auto dosage determination method and apparatus for coagulant control in the treatment of water
InactiveUS6241896B1Easy CalibrationReduce maintenanceWater treatment parameter controlSeparation devicesTurbidityEngineering
A method and apparatus for treating water by the addition of coagulants comprising the steps of measuring the two parameters of the color and turbidity of the untreated water, determining the control parameter on the basis of the measurement results obtained and determining a control action based upon the determined control parameter and subsequently implementing the selected control action.
Owner:ASSOCD WATER INDS
Nanosilica dispersion well treatment fluid
ActiveUS20180223152A1Reduce yieldReduce water treatment costsFlushingDrilling compositionWater productionSilicon dioxide
A well treatment fluid is provided having an acidic nanosilica dispersion and an alkanolamine. The nanosilica dispersion and the alkanolamine may form a gelled solid after interaction over a period. Methods of reducing water production using the well treatment fluids are also provided.
Owner:SAUDI ARABIAN OIL CO
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
Method for reuse of reclaimed water in circulating cooling water
ActiveCN103319007AEfficient use ofReduce the amount addedScale removal and water softeningCalcium biphosphateReclaimed water
The invention relates to a method for reuse of reclaimed water in circulating cooling water. The method comprises the steps of: (1) filtering reclaimed water and taking the filtered reclaimed water as make-up water of circulating cooling water; (2) adding a scale and corrosion inhibitor into the circulating cooling water, with the scale and corrosion inhibitor containing: A) polyaspartic acid and / or polyepoxysuccinic acid; B) a phosphorus-free copolymer containing a carboxylic acid group; C) a zinc salt and optionally D) a copper corrosion inhibitor; and (3) adding a bactericide and a nonionic surfactant into the circulating cooling water before and / or at the same time of and / or after adding the scale and corrosion inhibitor into the circulating cooling water. According to the method, the use of the reclaimed water as the make-up water of circulating cooling water in a circulating cooling water system can prevent the formation of calcium phosphate scale and the generation of corrosion and biological slime. Therefore, the use of the reclaimed water as the make-up water of circulating cooling water is effective.
Owner:CHINA PETROLEUM & CHEM CORP +1
Fully-automatic middle-water deep purifying and regenerating water reuse apparatus and process
InactiveCN1528688ASimple structureEasy to operateMultistage water/sewage treatmentSustainable biological treatmentNanofiltrationReclaimed water
The invention is a full-auto medium-water deep-purifying and regenerated water recovering device and technique, filtering the water to be processed by sand filtering tank, then filtering it by positive pressure biochemical water film filter, then sterilizing it in ozone generator, successively pumping the processed water by pump into aeration tank and synchronously irradiating the processed water by ultraviolet to be aerated and then be injected in the absorbing tank for absorption, and then injecting the absorbed water in the ultrafiltered water container; drawing and pressing the water in the ultrafiltering water container and then injecting in the nano filtering component for ion-level filtering, storing the produced pure water in the nano filtered water container to be used, and returning the strong water to the ultrafiltered water container for second treatment; the washing mode: opening the washing water inlet of the water distributor of the positive pressure biochemical film filter, and adding in pressure water to wash hollow external pressure ultrafilter film component, and then opening pressure sensing valve to discharge the sewage into the biochemical pond. If the device of the invention is linked with nano-filter water purifier to purify again, the water quality can reach drinking standard.
Owner:王元强
Three-dimensional landscape impounding reservoir system and method for recovering urban roofing rainwater by using same
InactiveCN102060388ARelieve pressureReduce water treatment costsMultistage water/sewage treatmentBiological water/sewage treatmentStormwaterEngineering
The invention relates to a three-dimensional landscape impounding reservoir system and a method for recovering urban roofing rainwater by using the same, relating to a landscape impounding reservoir and a method for recovering urban rainwater by using the same. The invention solves the problem of small application range of a traditional comprehensive urban rainwater utilization method. The three-dimensional landscape impounding reservoir system is a three-dimensional landscape impounding reservoir or is formed by connecting a plurality of three-dimensional landscape impounding reservoirs in series or parallel; each three-dimensional landscape impounding reservoir comprises an impounding reservoir and a landscape reservoir, and a drain hole, an overflowing hole and a water inlet are arranged at the side wall of the impounding reservoir which is communicated with the landscape reservoir through a communication device. The method comprises the following steps of: collecting rainwater to a high-density sedimentation tank for coagulation; then, filtering with a V-shaped filter tank and sterilizing with ultraviolet rays; and entering the three-dimensional landscape impounding reservoir system to finish the recovery of the urban roofing rainwater. The invention combines the rainwater recovery and the landscape by fully utilizing the urban space and can be used as an independent rainwater recovery and urban waterlogging prevention system or as an externally-hung circulating unit of a drainage system.
Owner:HARBIN INST OF TECH
Filtration system
InactiveUS20140042074A1Minimize energy consumptionCost reductionMembranesUltrafiltrationEngineeringWater treatment
Disclosed is an energy-saving and eco-friendly filtration system which is capable of minimizing the amount of the energy required for the filtration, thereby remarkably reducing the cost of water treatment. The filtration system of the present invention comprises: a feed water tank for storing a feed water to be treated; a hollow fiber membrane module for filtering the feed water supplied from the feed water tank; and a filtrate tank for storing a filtrate produced by the hollow fiber membrane module, wherein the hollow fiber membrane module comprises a plurality of hollow fiber membranes for filtering the feed water, and the sum of head pressure of the feed water in the feed water tank and water pressure of the filtrate in accordance with siphon principle is higher than the threshold membrane pressure of the hollow fiber membranes.
Owner:KOLON BENIT +1
Processing method of waste water generated in printing ink plastic package container cleaning
InactiveCN110204117AReduce processing costsReduce water treatment costsTreatment involving filtrationMultistage water/sewage treatmentPrinting inkFiltration
The invention discloses a processing method of waste water generated in printing ink plastic package container cleaning. The processing method comprises following steps: material collecting and processing, neutralizing adjusting, plate-frame pressure filtration, flocculation deposition, filter residue drying, Electro-Fenton processing, and the like. According to the processing method, the processing technology is stable; less pollution is generated in or after processing technology; water source is saved; the product obtained through processing can be recycled; and resource full utilization isrealized.
Owner:珠海市安能环保科技有限公司
Fluidized bed boiler plant and method of combusting sulfurous fuel in a fluidized bed boiler plant
InactiveUS8382470B2Readily put to end storageReduce water treatment costsBurnersFluidized bed combustionCombustionFlue gas
Owner:FOSTER WHEELER ENERGIA OY
Fluidized bed boiler plant and method of combusting sulfurous fuel in a fluidized bed boiler plant
InactiveUS20090053661A1Readily put to end storageReduce water treatment costsFluidized bed combustionFurnace componentsFlueProcess engineering
A fluidized bed boiler plant and a method of combusting sulfurous fuel in the fluidized bed boiler plant, a furnace of which plant is provided with a fluidized bed of particles. Sulfurous fuel, CaCO3-containing sulphur-binding agent and combusting air are introduced to the bed of particles, whereby fuel burns and generates flue gases and the sulphur-binding agent calcinates to CaO and binds SO2 generated in the combustion. Energy is recovered to a heat exchange medium circulating in heat exchange tubes of a condensing heat exchanger arranged in a flue gas channel, and a water solution of acid condensing on outer surfaces is neutralized by mixing it in a mixing vessel to a CaO-containing ash from a plant, preferably, fly ash collected by a dust separator.
Owner:FOSTER WHEELER ENERGIA OY
Organic sewage treatment complex reagent
InactiveCN104628105AImprove water treatment effectReduce water treatment costsOther chemical processesWater contaminantsActivated carbonAluminium salts
The invention discloses an organic sewage treatment complex reagent and a preparation method thereof. The preparation method of the complex reagent comprises the following steps: slowly adding ferric chloride to a polymeric ferric sulfate solution, and stirring for about 50 minutes; slowly adding ferrate to the mixed solution, and stirring; after the mixed solution is completely dissolved, slowly adding activated carbon and aluminum sulfate, and stirring for about 30 minutes; and after standing for half an hour, filtering to obtain the organic sewage treatment complex reagent. The product can be widely applied to the treatment of industrial sewage of food, textile, paper, leather, medicine and the like.
Owner:QINGDAO WATER WORLD ENVIRONMENTAL PROTECTION TECH
Nanocatalytic electrolysis and flocculation apparatus
InactiveUS20130264197A1Reduce water treatment costsReduce material consumptionCellsWater treatment compoundsFlocculationHydrogen
A nanocatalytic electrolysis and flocculation apparatus includes a housing, a water inlet on the housing, an impurities baffle in the housing, a water baffle in the housing, a drainage chamber defined by the impurities baffle and one side of the housing, a first gap between a bottom of the impurities baffle and a bottom of the housing, a water outlet on the drainage chamber, an impurities chamber defined by the water baffle and an other side of the housing, a second gap between a top of the water baffle and a top of housing, an impurities discharge port on the impurities chamber, a hydrogen discharge port on top of the housing, at least one electrolytic cell between the impurities baffle and the water baffle, an electrode in each electrolytic cell, a gas liquid separation chamber in the housing, and a drainage port on the bottom of the housing.
Owner:BOYING XIAMEN SCI & TECH
Hydropower cogeneration system
InactiveCN110143630AReduce water treatment costsAchieve self-sufficiencyGeneral water supply conservationSeawater treatmentWater useThermal energy
The invention discloses a hydropower cogeneration system. The system comprises: a boiler, which heats circulating water to generate steam; a generator set with subcritical or above-subcritical parameters, wherein the generator set with the subcritical or above-subcritical parameters receives the steam generated by the boiler and performs work to generate first electric energy and produce first extracted steam and first exhausted steam; a back-pressure generator set, which receives the first extracted steam generated by the generator set with the subcritical or above-subcritical parameters, andcontinues to work to generate second electric energy and produce second exhausted steam; a seawater desalination unit, which receives the second exhausted steam, performs desalination treatment on the second exhausted steam, and outputs condensed water and a part of desalinated water to the boiler for use; and a power grid, which receives the first electrical energy and the second electrical energy. The hydropower cogeneration system has the technical effects of desalinating seawater with steam heat energy, achieving self-sufficiency of fresh water, reducing treatment cost for water used by the boiler and realizing cogeneration and symbiosis of water and electric energy.
Owner:SHOUGANG JINGTANG IRON & STEEL CO LTD
Fully-automatic resurgent water deep purifying and resurgent water reuse apparatus and process
InactiveCN1238281CExtended service lifeSimple structureWater/sewage treatment by irradiationWater/sewage treatment bu osmosis/dialysisPositive pressureUltraviolet
The invention is a full-auto medium-water deep-purifying and regenerated water recovering device and technique, filtering the water to be processed by sand filtering tank, then filtering it by positive pressure biochemical water film filter, then sterilizing it in ozone generator, successively pumping the processed water by pump into aeration tank and synchronously irradiating the processed water by ultraviolet to be aerated and then be injected in the absorbing tank for absorption, and then injecting the absorbed water in the ultrafiltered water container; drawing and pressing the water in the ultrafiltering water container and then injecting in the nano filtering component for ion-level filtering, storing the produced pure water in the nano filtered water container to be used, and returning the strong water to the ultrafiltered water container for second treatment; the washing mode: opening the washing water inlet of the water distributor of the positive pressure biochemical film filter, and adding in pressure water to wash hollow external pressure ultrafilter film component, and then opening pressure sensing valve to discharge the sewage into the biochemical pond. If the device of the invention is linked with nano-filter water purifier to purify again, the water quality can reach drinking standard.
Owner:王元强
System for pelletizing solid refuse fuel
ActiveUS20150246464A1Avoid water pollutionReduce water treatment costsFrozen sweetsConfectioneryMolding machinePlastic waste
Disclosed is a system for pelletizing Solid Refuse Fuel (SRF). The system includes: a first crusher that primarily crushes plastic waste; a vibration sieve plate-conveyer that transports plastic waste that is primarily crushed by the first crusher; a second crusher that secondarily crushes the primarily crushed plastic waste sieved by the vibration sieve plate-conveyer; a first rotational shaft equipped with a first screw that fuses and transports the plastic waste which is secondarily crushed by the second crusher; a filter unit that is combined with the first rotational shaft and which removes impurities by filtering the secondarily crushed plastic waste that is fused and transported by the first screw; a second rotational shaft equipped with a second screw that transports impurity-free plastic waste filtered by the filter unit; and a molding machine that molds the plastic waste transported by the second screw.
Owner:PARK SUOOK YOUNG
Separation membrane diagnosis method, water processing method, separation membrane diagnosis device, water processing device and separation membrane diagnosis program
ActiveCN108602021AReduce water treatment costsReduce processing costsSemi-permeable membranesPermeability/surface area analysisDiagnosis methodsMembrane configuration
Provided are a separation membrane diagnosis method, a water processing method, a separation membrane diagnosis device, a water processing device, a separation membrane diagnosis program, and a storage medium on which the program is stored, with which the cost of water processing can be reduced by accurately ascertaining the state of a separation member used in water processing. The separate membrane diagnosis method includes: an acquisition step for acquiring an indicator expressing the state of a separation membrane that performs solid-liquid separation; a change-over-time recording step forrecording the change over time of the acquired indicator; an oscillation analysis step for analyzing the oscillations of the recorded change over time; and a determination step for determining the water permeability state of the separation membrane on the basis of the analyzed oscillations.
Owner:MITSUBISHI CHEM CORP
Method for reducing polymerization degree in process of producing pulp through linters
InactiveCN103882760AReduce peeling reactionReduce processing difficultyCellulosic pulp after-treatmentNon-woody plant/crop pulpFiberState of art
The invention provides a method for reducing polymerization degree in process of producing pulp through linters. The method comprises the following steps: treating the linters, bleaching and washing after bleaching, wherein an acid treatment step is arranged before or after the bleaching process, an acid treatment agent used in the acid treatment step is at least one acid, the amount of the acid treatment agent is 0.5-10 weight percent, the treatment temperature is 20-180 DEG C, the treatment time is 0.5-10 hours, the concentration of paper pulp is 3-30 weight percent; the amount of the acid treatment agent is inversely proportional to the treatment temperature; the amount of the acid treatment agent is inversely proportional to the treatment time; the treatment temperature is inversely proportional to the treatment time. The invention relates to the technical field of pulp for adhesive fibers, and the problems that the energy consumption in the process of reducing the fiber polymerization degree is high, the productivity is low, the treatment difficulty of black liquor is high and the water treatment cost is high in the prior art are solved.
Owner:李昊
Water purification and regeneration device based on rotary spray evaporation and application of device
InactiveCN102139982BNot prone to cloggingInfluent water quality requirements are lowGeneral water supply conservationWater/sewage treatmentFiltrationEvaporation
Owner:陆一心 +2
Water circulation method and water circulation system for improving surface quality of hot-rolled strip steel
PendingCN111072203AReduce suspended solidsLow costWater/sewage treatment by centrifugal separationFatty/oily/floating substances removal devicesWater circulationSewage
The invention discloses a water circulation method and system for improving the surface quality of hot-rolled strip steel. Indirect cooling circulation water of an indirect cooling circulation water system is filtered and cooled to be recycled by a user of the indirect cooling circulation water system. Laminar flow cooling circulating water of a laminar flow cooling circulating water system is filtered and cooled to be recycled by the laminar flow cooling system. Direct cooling circulating water of a direct cooling circulating water system is filtered and cooled to be recycled by a user of thedirect cooling circulating water system; water replenishment of the direct cooling circulating water system uses drained water of the laminar cooling circulating water system and the indirect coolingcirculating water system and new water; and the direct cooling circulating water system discharges sewage. A reverse cross water supply process, namely new water-clean circulating water-turbid circulating water-laminar flow water-new water, is adopted, so that the comprehensive concentration multiple of the clean circulating water and the turbid circulating water can be more than 3, the laminar flow water quality requirement can be met, and hot rolled strip steel meeting different user requirements can be produced under the existing descaling condition.
Owner:武汉钢铁有限公司
A method and device for urging snails to spit out sediment
ActiveCN112205328BAffect physiological habitsReduced activityClimate change adaptationPisciculture and aquariaWater storageTap water
The invention discloses a method and a device for urging snails to spit out sediment. The device for urging snails to spit out sediment is provided with a box body, a water distribution pipe, a static bed, an overflow plate, a settling tank and a water circulation system; the device for urging snails to spit out sediment The method is to place a static bed in the box, then add snails to the static bed, and evenly arrange the snails. After installing the snails, open the tap water valve and slowly add tap water. The water storage height is 45-50cm; then continue to slowly add tap water to the circulating water valve Overflow; or start the circulation pump; control the water temperature at 15-30°C; add emetic salt and 2-methyl-3-mercaptofuran to the storage water when the snails are left to spit sand, and replace the equipment every 3 hours Store water in the middle, and increase the water flow to take away the sediment. The invention can clean up the mud and sand in the body of the snail within 8 hours, increases the time for the snail to spit out the sand several times, has remarkable effect, and is suitable for industrialized production.
Owner:GUANGXI UNIV
Method for adjusting concentration of cooling water treatment agent in circulating cooling water system, method for recovering discharged cooling water, and treatment device for discharged cooling water
ActiveCN106414344ASmooth runningReduce water treatment costsCleaning heat-transfer devicesUltrafiltrationWater recoveryChemistry
The present invention reduces the water treatment cost while increasing and stabilizing the water recovery rate when a water recovery system using a separation membrane recovers discharged cooling water, such as blow water from a circulating cooling water system. This circulating cooling water system, into which a cooling water treatment agent is added, is provided with a water recovery system that uses a separation membrane to treat discharge water from the circulating cooling water system, and returns the treated water to the circulating cooling water system. In this circulating cooling water system, the concentration of the cooling water treatment agent in the circulating cooling water system is adjusted in accordance with changes in performance of the separation membrane in the water recovery system.
Owner:KURITA INDUSTRIAL CO LTD
Horseradish peroxidase catalytic dyeing method for cotton fabric
InactiveCN112663350AImprove wet fastnessReduce the rate of dyeingDyeing processTextile printerDyeing wastewater
The invention provides a horseradish peroxidase catalytic dyeing method for cotton fabric. The method comprises the following step that catechol, 2, 5-diaminobenzenesulfonic acid, horseradish peroxidase, hydrogen peroxide and water are mixed and stirred uniformly to obtain a horseradish peroxidase catalytic dyeing bath, wherein the ratio of the catechol to the 2, 5-diaminobenzenesulfonic acid is 1: 3 to 1: 10, the addition amount of the horseradish peroxidase is 0.1-0.5 g / L, the addition amount of the 27% hydrogen peroxide is 1-4 mL / L, and the pH value is adjusted to 4-6. According to the method, the technical problem of how to optimize the current dyeing process can be solved, the cotton fabric dyed by using the method is high in fixation rate and color fastness, the discharge of printing and dyeing wastewater can be effectively reduced, and the method is of great significance to green production of the textile printing and dyeing industry.
Owner:浙江灏宇科技有限公司
Method for purifying biodiesel
ActiveCN102533442BNo pollution in the processSimple processBiofuelsFatty-oils/fats refiningBiodieselGlycerol
Owner:中青能源科技有限公司
Plastic coating PVD technology and plastic coating structure
InactiveCN109989043AStrong adhesionImprove conductivityVacuum evaporation coatingSputtering coatingChromium carbideSurface cleaning
The invention discloses a plastic coating PVD technology. The plastic coating PVD technology comprises the steps that 1, surface cleaning treatment is conducted on a plastic substrate, and the cleanedplastic substrate is mounted on a clamp; 2, the plastic substrate on the clamp is subjected to magnetron sputtering ion plating treatment, and thus a titanium metal layer is deposited on the plasticsubstrate; 3, a magnetron sputtering ion plating technology is conducted, thus a copper metal layer, nickel layers, a chromium layer and a chromium carbide layer are deposited on the titanium metal layer in sequence; 4, the plastic substrate treated in the step 3 is activated or passivated; and 5, the plastic substrate treated in the step 4 is placed in pure chromium cylinder liquid to obtain thechromium layer. The metal film layer deposited through the plastic coating PVD technology meets the performance requirements of high adhesion, high binding force and good conductivity, and the productproduction yield is effectively increased.
Owner:KUNSHAN ENIJOR ELECTRONICS CO LTD
Method for reuse of reclaimed water in circulating cooling water
ActiveCN103319007BEfficient use ofReduce the amount addedScale removal and water softeningActive agentCarboxylic acid
The invention relates to a method for reuse of reclaimed water in circulating cooling water. The method comprises the steps of: (1) filtering reclaimed water and taking the filtered reclaimed water as make-up water of circulating cooling water; (2) adding a scale and corrosion inhibitor into the circulating cooling water, with the scale and corrosion inhibitor containing: A) polyaspartic acid and / or polyepoxysuccinic acid; B) a phosphorus-free copolymer containing a carboxylic acid group; C) a zinc salt and optionally D) a copper corrosion inhibitor; and (3) adding a bactericide and a nonionic surfactant into the circulating cooling water before and / or at the same time of and / or after adding the scale and corrosion inhibitor into the circulating cooling water. According to the method, the use of the reclaimed water as the make-up water of circulating cooling water in a circulating cooling water system can prevent the formation of calcium phosphate scale and the generation of corrosion and biological slime. Therefore, the use of the reclaimed water as the make-up water of circulating cooling water is effective.
Owner:CHINA PETROLEUM & CHEM CORP +1
System for pelletizing solid refuse fuel
ActiveUS9662808B2Avoid water pollutionReduce water treatment costsPlastic recyclingBiofuelsMolding machinePlastic waste
Disclosed is a system for pelletizing Solid Refuse Fuel (SRF). The system includes: a first crusher that primarily crushes plastic waste; a vibration sieve plate-conveyer that transports plastic waste that is primarily crushed by the first crusher; a second crusher that secondarily crushes the primarily crushed plastic waste sieved by the vibration sieve plate-conveyer; a first rotational shaft equipped with a first screw that fuses and transports the plastic waste which is secondarily crushed by the second crusher; a filter unit that is combined with the first rotational shaft and which removes impurities by filtering the secondarily crushed plastic waste that is fused and transported by the first screw; a second rotational shaft equipped with a second screw that transports impurity-free plastic waste filtered by the filter unit; and a molding machine that molds the plastic waste transported by the second screw.
Owner:PARK SUOOK YOUNG
Method for preparing inorganic-organic composite flocculant made of polymeric aluminum and modified compound biological flocculant
InactiveCN102642900BImprove stabilityImprove adsorption bridging effectWater/sewage treatment by flocculation/precipitationPotassium persulfateSulfite salt
The invention relates to an inorganic-organic composite flocculant made of polymeric aluminum and a modified compound biological flocculant and a method for preparing the inorganic-organic composite flocculant. The inorganic-organic composite flocculant is made by reaction of mixture of aluminum chloride and the modified compound biological flocculant according to the mass ratio of 1-8:1. The aluminum chloride is made by steps: dissolving AlCl3 6H2O raw material into distilled water, adding Na2CO3 for adjusting alkalinization level, and reacting at the normal temperature to obtain the aluminum chloride. The MCBF (modified compound biological flocculant) is made by graft copolymerization of compound biological flocculant, acrylamide and dimethyl diallyl ammonium chloride in initiator existence of potassium persulfate and sodium sulfite. The inorganic-organic composite flocculant integrates the advantage of high product stability of the MCBF and the advantages of wide feeding range, low water treatment cost and the like of the polymeric aluminum, can be widely used for fields of water supply wastewater treatment, papermaking, textile dyeing, daily chemicals and the like, and has fine water treatment effect.
Owner:SHANDONG UNIV
A kind of pickling method of hot-rolled 304 austenitic stainless steel
The invention relates to a hot-rolled 304 austenitic stainless steel pickling method, comprising a pretreatment step, a sulfuric acid pickling step, a first mixed acid pickling step, a second mixed acid pickling step and a third mixed acid pickling step, Wherein the mixed acid solution used in the above-mentioned three-stage mixed acid pickling step is a mixed pickling solution of nitric acid and fluosilicic acid. The present invention adopts the mixed acid pickling solution of nitric acid+fluorosilicic acid, and H2SiF6, like HF, has strong dissolution and erosion ability to scale and metal matrix, which can increase the pickling efficiency. During the pickling process, the activity of the acid solution remains basically unchanged, which increases the service life of the acid solution, reduces the discharge of waste acid, and reduces production costs and water treatment costs. In the mixed acid pickling solution, fluoride precipitation will not be generated, pipelines will not be blocked, and the number of maintenance shutdowns will be reduced.
Owner:WISDRI ENG & RES INC LTD
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