179results about How to "Fully remove" patented technology

The invention relates to a preparation process for reclaimed concrete aggregates and reclaimed concrete employing the reclaimed concrete aggregates. The process comprises the following processing steps: S1: pretreatment; S2: reinforcement treatment; S3: screening treatment; S4: grading treatment: adding reclaimed concrete aggregates with the grain size smaller than 5 mm into a gravel grinder, carrying out polishing until the grain size is 0.2 mm to 0.6 mm, and carrying out grading treatment by wind power to remove micropowder with the grain size smaller than 0.2 mm and obtain reclaimed concrete fine aggregate grains with the grain size is 0.2 mm to 0.6 mm; subjecting reclaimed concrete aggregate grains with the grain size of 5 mm to 20 mm to crushing treatment until the grain size is 5 mm to 7 mm, so as to obtain reclaimed concrete coarse aggregate grains with the grain size of 5 mm to 7 mm; and subjecting reclaimed concrete coarse aggregates with the grain size of 20 mm to 50 mm to hammering treatment, and repeating the step S3; and S5: baking and collecting. Through carrying out reinforcement treatment on the reclaimed concrete aggregates, the porosity and water absorption rate of the reclaimed concrete aggregates are lowered, and the mechanical strength of the reclaimed concrete aggregates is improved, so that the mechanical strength and durability of the reclaimed concrete are improved, and the applicable range of the reclaimed concrete is increased.

The invention relates to a method for refining and purifying polyformaldehyde dialkyl ether. By deeply researching the extraction unit technique of the polyformaldehyde dialkyl ether in the prior art, the invention finds out the reasons for influencing the extraction yield of the extraction unit and the purity of the extraction product, thereby providing a refinement extraction technique capable of enhancing the extraction yield and product purity. A proper amount of sulfite is added into the polyformaldehyde dialkyl ether balance product to remove formaldehyde in the polyformaldehyde dialkyl ether balance system. The method for refining and purifying polyformaldehyde dialkyl ether belongs to solid-phase reaction, the generated alpha-hydroxysulfonate is insoluble in the product, the impurities after reaction are easy to separate, and thus, the technique is simple. The method of adding sulfite several times is beneficial to breaking the adsorption balance between the sulfite and formaldehyde, so that the reaction proceeds forwards, thereby sufficiently removing the methanol by the reaction. Since the sulfite is added in a solid phase, the problem of dissolution of methanol and other materials in the water solution does not exists, and thus, the recovery rate of the product is high, thereby effectively lowering the production cost.

The invention relates to a preparation technique of water-soluble polyvinyl alcohol fiber and application thereof, which is characterized in that in the preparation of spinning stock solution, the mixed solvent of dimethyl sulfoxide and water is used for dissolving polyvinyl alcohol, and the weight percentage concentration is controlled to 5-25%; porous wet gel spinning is adopted, and at least 5000 holes are available; and the water soluble temperature of the obtained fiber is 20-80 DEG C. The invention shortens the dissolution time of the polyvinyl alcohol and leads the polyvinyl alcohol to be fully dissolved; and the obtained solution is good in spinnability, is capable of producing high-quality water-soluble fiber and realizes the requirement of industrialization for the yield. The water-soluble fiber obtained by the invention is used for producing long tows, or being processed into wool tops, or being blending with the wool tops, cotton slivers, hemp and other chemical fibers, and can be made into high count yarn or hollow yarn or short fiber used for non-woven fabrics, embroidered base cloth and paper making.

Provided are a filter cleaning mechanism by which deterioration of filter cleaning performance can be suppressed, and an air conditioning apparatus. A filter cleaning mechanism (40) for an air conditioning apparatus is provided with a filter (21) for removing dusts from air passing through, a brush section (72), a brush driving section (73), and a brush cleaning section (74). The brush section (72) is provided with a core material (76), and a plurality of wire rods (77) arranged on the circumference of the core material (76), and dusts are removed from the filter (21) by bringing the wire rods (77) into contact with the filter (21). The brush driving section (73) rotates the brush section (72). The brush cleaning section (74) is arranged along the rotating shaft direction of the brush section (72) and has a comb-like shape that makes contact with the brush section (72). The brush cleaning section scrapes out dusts from the brush section (72) by rotating the brush section (72).

The invention provides a lubricant composition of metal materials for water-based plastic processing. The composition is good in lubrication, ablative resistance and rust resistance. Plastic processing like steel or stainless steel forging can be conducted even without convesion coating. Due to the lubricating coating is water-based, coating can be fully removed only by water, and thereby good coating removement is achieved. The lubricant composition comprises water, water soluble polymer compound (a), inorganic metal salt (b), wherein the water soluble polymer compound (a) and the inorganic metal salt (b) are dissolved or dispersed in water, and the weight ratio (b)/(a) between the water soluble polymer compound (a) and the inorganic metal salt (b) is in the range of 0.1-5.

The invention provides a refining extraction technology capable of remarkably improving the extraction rate and the product purity after discovering the reason leading to the low extraction rate of an extraction unit and low purity of the extraction product through intensive study on the polyformaldehyde dialkyl ether extraction unit technology in the prior art. An aim of removing formaldehyde in a polyformaldehyde dialkyl ether balance system is achieved by adding sodium percarbonate into a polyformaldehyde dialkyl ether balance product; the method for refining and purifying polyformaldehyde dialkyl ether belongs to a solid-phase reaction; the impurities after reaction are easy to separate, the technology is simple, the reaction is mild, and the operation is easy; the sodium percarbonate increases a small number of peroxide chains on polyformaldehyde dialkyl ether while removing formaldehyde, and the peroxide chains are favorable for increasing the cetane number of the polyformaldehyde dialkyl ether; since the sodium percarbonate is added as a solid phase, the problem that materials such as methanol and the like are dissolved in an aqueous solution is avoided, and the recovery rate of the product is high; and therefore, the production cost can be effectively reduced.

The invention discloses a sewage circulating treatment system, which comprises a bracket, a filter box, a precipitation barrel, a base, an oil-water separation box and a purification box, the top of the bracket is provided with the precipitation barrel and the filter box; the two sides of the precipitation barrel are respectively fixedly provided with a fourth motor and a first slide rail; the output shaft of the fourth motor is fixedly provided with a second threaded rod; the second threaded rod is sleeved with a sleeve; and the sewage circulating treatment system carries out vibration filtration through a filter screen to remove large residues. The residues on the filter screen is extruded out of water by a hot pressing plate, grease is melted, and water utilization rate is improved; then the precipitation box carries out stirring and precipitating to remove a precipitate; the grease is absorbed by an oil absorption plate, oil and water separation is performed; finally, an absorption layer is used for absorption, peculiar smell is removed, a filter layer is used for filtering and decomposing; an ultraviolet lamp is used for sterilizing and disinfecting; and finally, the obtained liquid completely meets the use standard, and can be used again, and a large amount of water resources can be saved.

The invention belongs to the technical field of cement production, and particularly relates to a reducing hexavalent chromium type grinding aid and a preparing method thereof. In an existing cement chromium removal technology, ferrous sulfate is prone to being oxidized by oxygen in air and losing efficacy under the conditions of high-temperature grinding and long-term storage, hexavalent chromiumis not completely removed, and a large amount of water-soluble hexavalent chromium is still left in cement and probably causes harm to a contact human body. By means of the technical scheme, the method includes the following steps of firstly, evenly mixing a solution of grinding aid components and ferrous sulfate wrapping an organic protection layer in proportion; secondly, preparing a sodium citrate solution; thirdly, adding ascorbic acid to a mixed solution obtained in the first step to be sufficiently dissolved, and adding the sodium citrate solution obtained in the second step under the heating condition to be evenly stirred to obtain the grinding aid. The grinding aid is suitable for the cement grinding process.

This invention relates to a cleaning unit comprising: a cleaning blade that keeps a front end of rubber material in contact with the surface with a pressure so as to scrape residual toner left on the surface of the photoreceptor and a fiber body having multiple fibers in contact with the surface of the photoreceptor in the upstream in the cyclic moving direction of the surface of the photoreceptor with respect to the cleaning blade, wherein the cleaning blade satisfies conditions A>=-2.5xB+102 and 6.3<=B<=19.6, where A designates a contact angle ( DEG ) with pure water under 23 DEG C, 55% RH and B designates 100% modulus (MPa) at 23 DEG C.

The invention relates to a treatment method and device of liquid waste containing inorganic salt. The treatment method and device fully remove the impurities contained in the liquid waste containing inorganic salt and recycle high-quality acid and alkali at low cost. The device is provided with an impurity removing device (10) for removing the impurities from the liquid waste containing inorganic salt and an electrodialysis device (20) for separating the treated liquid waste into acid solution and alkali solution through electrodialysis and recycling the acid solution and the alkali solution, wherein the impurity removing device (10) is provided with a crystallization device (12), a salt separation device (13), a dissolving tank (14) and a concentration device (15); the crystallization device (12) is used for precipitating the inorganic salt in the liquid waste; the salt separation device (13) is used for separating the precipitated inorganic salt from the filtrate; the dissolving tank (14) is used for generating the solution of the separated inorganic salt; and the concentration device (15) is used for evaporating and concentrating the filtrate generated in the salt separation device to supply the concentrated filtrate generated in the concentration device to the crystallization device (12).

The invention discloses a method for producing tripropylene glycol methyl ether .The method is characterized in that the method comprises the following steps: carrying out a ring opening addition reaction on a raw material propylene glycol methyl ether extracted tower bottom liquid and epoxypropane under the action of a highly alkaline catalyst, recovering excess 2-methoxy-1-propanol in the above obtained synthesized products, and rectifying to obtain dipropylene glycol methyl ether; neutralizing a dipropylene glycol methyl ether extracted alcohol ether solution by oxalic acid to neutrality, filtering out generated oxalate by a screen mesh, rectifying for separating light components, and distilling to obtain the tripropylene glycol methyl ether product; and washing wet sodium oxalate by methanol, and rectifying the obtained methanol solution to recover sodium oxalate and methanol and obtain an alcohol ether solution with a high boiling point. The boiling range of tripropylene glycol methyl ether obtained through the method accords with requirements, and a gas chromatography result shows that the total mass fraction of eight isomers of tripropylene glycol methyl ether can reach above 97.0%, so the use requirements of downstream coatings, inks and the detergent industry on tripropylene glycol methyl ether are met.

The invention provides a reproducing method of molding sand which can completely remove micro mist attached on the sand surface. The molding sand is recovered from sand mould shakeout used for molding, wherein the reproducing method of molding sand includes the processes as follows: a roasting process for roasting molding sand and burning organic matters attached on the molding sand (step S5); a first polishing process that for shaving a film including magnetic red iron ore which has been formed on the surface of molding sand by carrying out the roasting process (step S7); and a second polishing process which shaves off within a housing (51) the surface of the molding sand of the film with a grinding capability lower than the grinding capability in this first polishing process (step S8). The second polishing process discharges the surface fines adhering to the surface of molding sand on which the film was shaved off by said first polishing process, and discharges these fines out of the housing with a wind force.

The invention provides a thallium-containing wastewater adsorption material and a preparation method thereof. The adsorption material comprises the following raw material components: chloromethyl polystyrene microspheres and thiourea. The chloromethyl polystyrene microspheres comprise the following raw materials: polystyrene microspheres, an organic solvent and tin tetrachloride. The preparation method comprises the following steps: 1, preparing polystyrene microspheres; step 2, preparing chloromethyl polystyrene microspheres; step 3: preparation of the adsorption material: adding the chloromethyl polystyrene microspheres and thiourea into absolute ethyl alcohol according to a mass ratio of 1:2, carrying out heating reflux for 2 hours to prepare an intermediate mixed solution, hydrolyzingthe intermediate mixed solution for 12 hours by using a 50% sodium hydroxide solution under the protection of nitrogen to prepare a mixed solution, and cooling the mixed solution, alternately cleaningthe mixed solution by using distilled water and a 2 mol/L hydrogen chloride aqueous solution, and drying the mixture to prepare the adsorption material. The adsorption material can be used for treating the concentration of thallium in wastewater to be less than 5 [mu] g/L and ensures that the thallium-containing wastewater reaches the industrial discharge standard.

The invention discloses a new method for preparing a ruthenium nitrosyl nitrate solution or pure crystal, which comprises the following steps: 1. preparing a pure HNO2 solution; 2. dissolving commercially available RuCl3.nH2O in dilute nitric acid, gradually adding the HNO2 solution prepared in the step 1 under reflux conditions, and stirring until the solution completely becomes rose red, thereby obtaining an intermediate ruthenium nitrosyl chloride; 3. removing excess Cl<-> with an AgNO3 solution, and filtering to obtain a ruthenium nitrosyl nitrate nitric acid solution which conforms to the application requirements; and 4. drying the ruthenium nitrosyl nitrate nitric acid solution obtained in the step 3 by distillation to obtain the pure ruthenium nitrosyl nitrate solid. The method has the advantages of cheap and accessible raw materials, fewer steps and environment friendliness, does not need to design or use any special device, has wide application range (from laboratory small testing to industrial-scale generation), and has very high popularization value.

Spherical convex micro-lenses are arranged between rectangular grooves adjacent to each other of a lens plate. The arrangement of convex micro-lenses is made to be in parallel with the short-side direction of the lens plate, namely, the direction of the rectangular grooves. Since stray light appears mainly on the convex micro-lenses arranged in the long-side direction of the lens plate, the stray light to appear in the long-side direction of the lens plate is removed by forming grooves at regular intervals in the long-side direction of the lens plate and forming a light absorbing film in each of the rectangular grooves. Or the stray light to appear in the long-side direction of the lens plate is removed by making the direction of arrangement of convex micro-lenses different from the long-side direction of the lens plate.

The invention discloses a method for preparing a dibutyltin dilaurate catalyst. The method comprises the following steps of: adding lauric acid and dibutyl tin oxide, stirring, and heating, wherein when the temperature is raised to 50 DEG C, the reaction system has negative pressure; continuously heating to the temperature of between 80 and 88 DEG C, maintaining the temperature of the system, performing continuous reaction for 2 hours, stopping the negative pressure, adding acetic anhydride, and continuously reacting for 1 hour with stirring; and compounding the solution obtained by the reaction and auxiliary agents in a certain mass ratio, and thus obtaining a finished product. The method is optimized on the basis that the activity of the catalyst is not reduced, and is easy to operate and convenient to control; the lauric acid is basically completely reacted, so the utilization rate of the raw material is high, the energy consumption is relatively low, loss of the materials and waste of the energy are avoided, the production cost is reduced, and the side reaction is little; and the product is difficult to crystallize, and the freezing point of the product is obviously reduced.

The invention discloses a treatment method for high-concentration phosphorus-containing wastewater. The treatment method comprises the steps: adding alkali liquor into the high-concentration phosphorus-containing wastewater, adjusting pH to 7.2 to 8 to enable ortho-phosphate to present in forms of monohydrogen phosphate and dihydrogen phosphate, then, adding a precipitant to enable phosphate and the precipitant to form an insoluble compound, and carrying out filtering; adding filter liquor into a supercritical water oxidation reaction device, thoroughly blending organics, oxygen gas and waterduring reaction under a supercritical state so as to form a uniform phase, rapidly oxidating organic phosphorus into inorganic phosphate, and releasing the inorganic phosphate into a liquid phase; andadding ferric polysulfate and an anionic polyacrylamide solution into supercritical treated wastewater, and carrying out condensation and flocculation processes, so as to settle and remove phosphate.According to the method, phosphorus is removed by employing a supercritical oxidation and chemical precipitation cooperated method, phosphorus removal is rapid and thorough and is relatively wide inrange, high-concentration organic phosphorus and inorganic phosphorus can be treated, and the content of total phosphorus in final wastewater is lower than 1mg/L.

According to the present invention, a removing method comprises a following process of removing, after a salt is added to a waste liquid of Si-containing hydrofluoric acid, a precipitate generated due to the added salt. In such a way, a process for removing Si in the waste liquid is obtained. The salt is preferably selected from one or two or more salts from a fluoride metal salt and a chloride metal salt. The Si contained in waste liquid of the Si-containing hydrofluoric acid can be effectively reduced or removed by using the removing method.

The invention discloses a printing and dyeing wastewater treatment system and technology. An HCAO (hydrolytic acidification dominant bacterial strain aerobic contact oxidation) system which is summarized and developed by the applicant according to many years of practical experience in the printing and dyeing wastewater engineering is used for treating high-concentration printing and dyeing wastewater, the content of SS (suspended solids) and BOD in recycled water can meet discharge requirement, sludge activity is good, and settling property is good. The printing and dyeing wastewater treatment technology disclosed by the invention has the advantages that the printing and dyeing wastewater can be deeply treated, and the standards of recycled water are met, so that pure investment on wastewater treatment is changed into investment with output, the multiple effects of reducing discharge amount of wastewater, saving water resource and protecting the environment are achieved, and the market demand of the spinning, dyeing and finishing industry can be met.

The invention discloses an industrial carbon monoxide waste gas treatment device. The industrial carbon monoxide waste gas treatment device comprises a carbon monoxide converter, a carbon dioxide absorber and an activated carbon purifier, wherein the carbon monoxide converter comprises a vertically arranged shell, and a first partition board and a second partition board which are horizontally arranged inside the shell; the first partition board and the second partition board partition the shell into a mixing chamber, a primary converting chamber and a secondary converting chamber from the bottom to the top; multiple groups of baffle plates are arranged inside the mixing chamber; multiple groups of primary reaction plates are arranged inside the primary converting chamber; a plurality of gas-distributing pipes and a plurality of primary reaction tubes are arranged inside the secondary converting chamber; the carbon dioxide absorber is communicated with the carbon monoxide converter; thecarbon dioxide absorber comprises a body, a gas outlet header pipe, a plurality of gas outlet subpipes, a liquid outlet pipe and a liquid removing screen mesh. The industrial carbon monoxide waste gas treatment device can completely convert carbon monoxide into carbon dioxide and absorb the carbon dioxide, so that the pollution problem of carbon monoxide waste gas is fundamentally solved.

The invention relates to an aluminum alloy used for preparing a gearbox shell and a preparation method thereof and belongs to the field of aluminum alloys. Raw materials of the aluminum alloy comprise 9.5-12.5% of Silicon, 2.5-3.5% of copper, 0.5-0.75% of nickel, 3.5-4.5% of magnesium, 7.5-8.5% of zinc, 2.5-3.5% of manganese, 0.9-1.1% of titanium, 1.5-2.5% of chrome, 0.01-0.015% of lanthanum, 0.002-0.004% of yttrium, 0.01-0.015% of samarium and the balance aluminum. The raw materials are heated till the temperature is 775-785 DEG C and then are melted; helium pre-heated for 2-3 min is pumped into the raw materials in a molten condition from the bottom of a container, clinker and dross are removed, then the raw materials in the molten condition are poured into a mould after standing is conducted for 20-30 min, and a primary manufactured shell is obtained; and quenching treatment is conducted at the temperature of 510-515 DEG C, and aging treatment is conducted at the temperature of 160-220 DEG C. The aluminum alloy used for preparing the gearbox shell is good in high-temperature mechanical property and airtightness, and the service life of a gearbox is prolonged.

The invention belongs to the technical field of waste gas cleaning, and specifically discloses a dust removal and desulphurization tower. The dust removal and desulphurization tower comprises a dust removing tower and a desulphurization tower, wherein the desulphurization tower comprises an outer tower and an inner tower; an air channel is formed between the inner tower and the outer tower; an annular sliding plate is glidingly connected to the air channel; a first spray head is arranged in the inner tower; a second spray head is arranged in the outer tower; a communication pipe which is communicated with the upper part of the inner tower is connected to the dust removing tower; a motor and a transmission shaft are arranged at the upper part of the dust removing tower; a cam is fixed to the transmission shaft; a first piston barrel is arranged at the lower part of the cam; a first piston is glidingly connected into the first piston barrel; a first pushing rod is fixed to the first piston; a dust removing mechanism is arranged in the dust removing tower; a pushing plate is glidingly connected into the dust removing tower; a second piston barrel is arranged below the pushing plate; asecond piston is glidingly connected into the second piston barrel; a second pushing rod is fixed to the second piston; a single-control switch and a third piston barrel are arranged in the dust removing tower. The dust removal and desulphurization tower is simple in inner structure, and is capable of fully performing desulphurization.

The invention discloses an EPS plastic foam cooling water circulating system, which comprises a cooling device, a first settling pond, a second settling pond and a reservoir, wherein a water outlet is formed in the cooling device; the water outlet is connected with a cooling water receiving system through a pipeline; the cooling water receiving system, the first settling pond, the second settling pond and the reservoir are sequentially connected with one another through a pipeline; a filter net or a filter is arranged between the first settling pond and the second settling pond; water softening equipment is arranged between the second settling pond and the reservoir; air cooling equipment is arranged between the water softening equipment and the reservoir; and the reservoir is connected with the cooling device through the pipeline. The overall pipeline cycle control is achieved; losses and waste of cooling water in the circulating process are reduced; a manual operation is reduced; the cooled water is clarified; pipe blockage is avoided; water hardness is softened; workshop production equipment and an EPS plastic foam mold are protected; the service lifetime is prolonged; the maintenance cost is reduced; and the yield of EPS foam is improved.