40results about How to "High degree of removal" patented technology

A hydrolysis denitrification denitrification system and method. The system replaces the traditional anoxic tank with an upflow sludge bed hydrolysis reactor. The hydrolysis reactor includes: an effluent return channel, which is arranged between the sedimentation tank and the hydrolysis reactor, so that the discharged water from the sedimentation tank contains The nitrate supernatant is used as reflux to flow back into the hydrolysis reactor for hydrolysis, denitrification and denitrification. In the present invention, the hydrolysis reactor is used as the functional area of ​​pre-denitrification denitrification, and the good anaerobic environment in the hydrolysis reactor, the rapid recovery ability of the denitrification bacteria function and the sufficient supply capacity of organic matter are used to realize efficient and stable hydrolysis reaction. Nitrification and denitrification. The invention makes full use of the carbon source in the sewage, improves the denitrification efficiency, and reduces the energy consumption of the whole sewage treatment process. The invention can be combined with common urban sewage treatment processes such as AAO and oxidation ditch, and is convenient for upgrading and reforming existing facilities of sewage treatment plants.

The invention discloses a system and a method for deeply treating sewage and recycling resin regeneration waste liquid. The system comprises a biochemical pool, a settling pond, a powder activated carbon membrane biological reactor, a resin tank, a waste liquid collecting pool, a denitrification pool, a nitration pool and a sludge concentration pool. The method is characterized in that the incoming water of a sewage treatment plant is pre-treated and then enters the biochemical pool, thus the CODcr can be degraded under the effect of activated sludge; supernate flows into the powder activatedcarbon membrane biological reactor after settling, and thus pollutants can be further adsorbed through the powder activated carbon; chroma, suspension substances and CODcr are removed by interceptingthrough a membrane assembly; the water drained by the membrane is fed into the resin tank, and nitrate in the sewage can be removed under the adsorption effect of special nitrate ion exchange resin, and the clean water is directly drained; the resin regeneration waste liquid flows into the waste liquid collecting pool and is then fed into the denitrification pool for denitrification; the water subjected to denitrification flows into the nitration pool for nitration, thus ammonia nitrogen can be reduced, and CODcr can be degraded; the liquid subjected to nitration flows back to the denitrification pool; and the water drained by the nitration pool flows back to the biochemical pool at the front end, thus realizing the recycling of the resin regeneration waste liquid.

A method for forming via comprises the following steps: forming a medium layer on a substrate; imaging the medium layer and forming a contact hole; forming an adhesive substratum covering the side wall and bottom wall of the contact hole; forming a first adhesive layer undergoing inorganic operation on the adhesive substratum; forming a second adhesive layer undergoing inorganic operation on the first adhesive layer; forming a metal layer covering the second adhesive layer and filling the contact hole. The method can reduce the contact resistance of the devices containing the via.

The invention discloses a sawing wire, steel for the sawing wire, and a production method thereof. The production method comprises the steps of desulfurizing molten iron till S in the molten iron is no more than 0.002%; mixing the desulfurized molten iron and steel scrap into molten steel, and desiliconizing and dephosphorizing the molten steel at 1330 DEG C-1380 DEG C; then, decarburizing the molten steel by blowing oxygen, and obtaining the molten steel comprising no less than 0.3% of C, no more than 0.01% of P and no more than 0.01% of S, wherein the temperature of the molten steel is no lower than 1650 DEG C; adding desoxidants and slagging media to the molten steel for deoxidation alloying; then, refining the molten steel for regulating chemical components and inclusions, wherein thecomponents of the inclusions comprise no more than 10% of Al2O3 and no more than 30% of CaO; degassing the refined molten steel and removing the inclusions to obtain the molten steel, wherein the sizeof the inclusions of the molten steel is no more than 10 [mu]m, and the number density of the inclusions is no more than 0.5 g/m<3>; and casting the molten steel into steel billets. The steel, prepared with the production method, for the sawing wire can be used as base metal for producing the sawing wire with the diameter of no more than 100 <mu>m and the tensile strength of no lower than 4600 MPa; and the length of the continuous wire in the process of manufacturing the sawing wire is no less than 200 km.

The present invention discloses a method of removing astringent tastes of peanut skins. The method comprises the following steps: the peanut skins are soaked using water, the soaked peanut skins are subjected to a microwave pretreatment, tannase is added, then zinc lactate and calcium lactate are added, the mixture is subjected to a microwave assisted enzymatic treatment, the treated mixture is filtered, and the filtered mixture is centrifuged to remove the astringent tastes of the peanut skins to obtain a peanut skin extract free of the astringent tastes. The present invention provides the high-efficient peanut skin astringent taste removing method. The method is good in astringent taste removing effects, at the same time can obtain the peanut skin extract free of the astringent tastes and rich in proanthocyanidin, and can widen the application of the peanut skins in food. The prepared astringent taste removing peanut skins can be applied in the food industry of health-care products, peanut drink, peanut ice cream, peanut milk tea, etc.

In the invention, a hydrolysis catalysis section is added in the middle of a common absorption tower commonly used in an alcohol-amine method, i.e. the one hydrolysis catalysis section is added nearbythe position with higher absorption temperature, a catalytic hydrolysis section is filled with100-300 mm of a hydrolysis catalyst of COS and CS2, and the catalytic hydrolysis is accelerated by utilizing the heat of an absorption reaction, so that the removal degree of COS and CS2 is increased to 70%-80% under the normal condition and is nearly increased twice when being compared with the traditional manner, and the bottleneck that the load of an absorption device cannot be increased due to lower removal degree of COS and CS2 and higher total sulfur is removed.

The invention belongs to the technical field of gas purification, and aims to provide an improved process for solving the problem that the traditional COS and CS2 catalytic hydrolysis process flow isinconvenient to adopt under the conditions that the removal degree of COS and CS2 is low and the total sulfur content is high in alcohol amine method natural gas purification. In the method, COS and CS2 hydrolysis catalysts are used for modifying a tower plate or filler in a deposition-impregnation or coating mode, wherein the modified tower plate or filler replaces a conventional tower plate or filler, so that the removal degree of COS and CS2 is improved to 80% or above and is nearly one time higher than that of the traditional tower plate or packing; therefore, a good COS and CS2 technicaleffect is achieved. The method provided by the invention is very convenient for technical transformation of high total sulfur and influence on product quality caused by low removal degree of COS and CS2 in the existing alcohol amine method device.

The invention discloses a method for producing food-grade disodium hydrogen phosphate by using wet-process dilute phosphoric acid. The method comprises the steps as follows: (1) membrane filtration: placing wet-process dilute phosphoric acid in an acid-resistant container, and filtering the wet-process dilute phosphoric acid by membrane filtration equipment to obtain purified wet-process dilute phosphoric acid; (2) neutralization reaction and simultaneous defluorination and desulfurization: placing the dilute phosphoric acid in an acid-resistant container, adding a defluorination and desulfurization agent and a potassium hydroxide solution, and carrying out stirring to obtain a neutralization solution; (3) oxidative arsenic removal, slightly alkaline heavy metal removal and membrane filtration: carrying out stirring, adding an oxidizing agent, adjusting the pH value to slight alkalinity, and carrying out heating, cooling and membrane filtration to obtain alkaline heavy metal removal and oxidative arsenic removal solution; (4) pH regulation and concentration: adjusting the pH of the slightly alkaline heavy metal removal and oxidative arsenic removal solution to obtain a disodium hydrogen phosphate concentrated solution; (5) cooling crystallization: transferring the disodium hydrogen phosphate concentrated solution in equipment, decreasing the temperature, and continuing crystallization; and (6) crystallization and drying. The method is easy to implement, simple and convenient to operate, low in cost and high in purity, arsenic and heavy metal ions are fully removed, the solubility property is good and mechanization can be realized.

The invention discloses high-cleanliness spring steel and a production method thereof. The production method comprises the following steps: pretreatment: desulfurizing molten iron until the content of S in the molten iron is less than or equal to 0.0015%; mixing the molten iron and waste steel into molten steel, carrying out desiliconization, dephosphorization and oxygen blowing decarburization, obtaining the molten steel with the temperature of 111011110 DEG C, the C content of 0.1010.15%, the O content of smaller than or equal to 0.045%, the P content of smaller than or equal to 0.011% and the S content of 0.00110.008%, carrying out slag stopping tapping, carrying out deoxidation alloying, and the flow of argon blowing at the bottom of a steel ladle during tapping and the flow of argon blowing at the bottom of the steel ladle after tapping are 80011000 NL/min and 1001200 NL/min respectively; refining the molten steel to adjust chemical components and inclusions, and the flow rates of the argon blowing at the bottom of the steel ladle are respectively 1001500 NL/min, 2001100 NL/min and 501100 NL/min in other time when slag charge adding and alloying treatment are carried out and the temperature is increased by electrifying; then carrying out vacuum refining and vacuum breaking soft stirring in sequence, and the flow of the argon blowing at the bottom of the steel ladle is 20150 NL/min and 501100 NL/min; and casting into a steel billet. In the high-cleanliness spring steel prepared through the production method, the density of inclusions with the size larger than 5 micrometers is smaller than or equal to 0.5pcs/mm < 2 >, the length-width product of the maximum inclusions is smaller than or equal to 900 micrometers < 2 >, and the high-cleanliness spring steel has high cleanliness.

The invention relates to the technical field of treatment of produced water of oil and gas fields, in particular to a system and method for modification treatment and recycling of produced water in anoil and gas field. The system for modification treatment and recycling of the produced water in the oil and gas field is provided with a sedimentation pool, a pH regulating pool, a first-stage filtering tank, a second-stage filtering tank, a resin tank and a clean water regulating pool which are all sequentially communicated with one another along the water treatment process; the second-stage filtering tank is communicated with the clean water regulating pool; a supernatant of the sedimentation pool is discharged into the pH regulating pool; outflow water of the pH regulating pool is sequentially discharged into the first-stage filtering tank and the second-stage filtering tank; outflow water of the second-stage filtering tank is discharged into the resin tank; outflow water of the resintank and the outflow water of the second-stage filtering tank are mixed in certain proportion, and the outflow water is sent to the clean water regulating pool for recycling. The system for modification treatment and recycling of the produced water in the oil and gas field has the advantages that various scaling cation removal processes are combined to treat the produced water in the oil and gas field, and the problems are effectively solved that in actual engineering, when produced water is conveyed by pipelines, the pipelines are blocked due to self-scaling, and the produced water cannot bere-injected for recycling.

The invention discloses a method for extracting stevioside from stevia rebaudiana. The method comprises the following steps: crushing dry leaves of stevia rebaudiana, adding water for soaking, addingcellulase for enzymolysis, and adjusting the pH value of the system to 5.6-6.5, and performing heating extraction, cooling, settling centrifugation and filtering to obtain an extract solution; heatingthe extract solution in a water bath, adding a flocculant, stirring the mixture uniformly, and adjusting the pH value of the system to 7.5-8.2, performing flocculating, centrifugally settling and filtering, adding a composite adsorbent, performing boiling in a normal pressure reflux state, and performing filtering and concentrating to obtain a concentrated solution; treating the concentrated solution on a silica gel chromatography column, performing eluting with a mixed solvent, collecting fractions, and performing vacuum concentrating and vacuum drying to obtain stevioside. The method has the advantages of simple process, low cost and high operability, and is suitable for factory production, the residual quantity of an organic solvent is quite low, obtained stevioside is white or off-white powder, and the purity and yield are high.

The invention belongs to the technical field of waste gas pollutant control. In the prior art, the environmental protection management on the tail gas discharge sulfides of the Claus sulfur recovery device is increasingly strict, and the treatment of H2S, COS and other sulfides in Claus tail gas by using the absorption method has disadvantages. Based on the problems in the prior art, the inventionprovides a new solution scheme. According to the present invention, by adopting the functional absorption liquid and the preferred process parameters, the absorbent and the method capable of improving the removal degree of H2S and other sulfides, reducing the CO2 co-adsorption rate and improving the H2S concentration in the regeneration acid gas in the case of no change of the original pressure of the tail gas, ie., under the low pressure, can be provided while the treatment load of the device can be increased.

The invention discloses a stevioside extraction and purification method, which comprises the following steps of crushing stevia rebaudiana dry leaves; adding water for soaking; adding cellulase for enzymolysis so as to obtain enzymolysis liquid; regulating the pH value of the enzymolysis liquid to be 5.6 to 6.5; raising the temperature for digestion; performing cooling, sedimentation centrifugation and filtering to obtain digestion liquid; uniformly mixing jute stalks, zeolite, palygorskite, rectorite and bentonite; performing roasting; lowering the temperature; performing crushing; adding water for mixed milling; performing spray drying to obtain composite adsorbents; performing water bath heating on the digestion liquid; adding flocculating agents; performing uniform stirring; regulatingthe system pH value to be 7.5 to 8.2; performing flocculating treatment, centrifugal sedimentation and filtering; adding composite adsorbents; performing boiling in a normal pressure backflow state;performing filtering and concentration to obtain concentration liquid; feeding the concentration liquid onto a silica gel chromatography column; then, performing elution by a mixed solvent; collectingfractions; performing vacuum concentration and vacuum drying to obtain the stevioside.

The invention relates to a cleaning method of an optical lens middle piece. The cleaning method comprises the steps of clear water pretreatment, solvent solution treatment, cleaning agent treatment, natural plant glue solution treatment, drying, cooling and the like. According to the method, a natural plant glue solution such as guar gum is adopted to treat an optical lens, the natural plant gluesolution has certain viscosity, and pollutants on the surface of the optical lens middle piece can be attracted. Meanwhile, the aqueous solution of the guar gum is of a network-like molecular structure so that the pollutants can be wrapped during a large amount of water catch, and therefore the pollutant removal degree of the surface of the optical lens middle piece can be improved.

The invention relates to the technical field of surface treatment, in particular to a single-color gradient film, a preparation method thereof, a cover plate, a device and application. The preparation method of the single-color gradient film comprises the following steps: S1, plating a color film on the surface of a cover plate substrate to obtain a plated cover plate; and S2, a certain inclination angle is formed between the color plating cover plate and the horizontal plane, the color plating cover plate is fixed, the color plating cover plate is pressed downwards on the color plating cover plate, and an elastic polishing layer of a polishing tool is rotated and moved to polish the color plating cover plate, the rotating axis of the elastic polishing layer is vertical and is located on one side of the whole color plating cover plate. According to the method, the single-color gradient cover plate is obtained in a physical polishing mode for the first time, the gradient effect after polishing treatment is more natural, and the cost is lower; and a transition gradual change method which cannot be realized by film coating from no color to color is realized.

The invention discloses a bone surface meat and tendon treatment device for bone glue processing, and relates to the technical field of bone glue processing. The bone surface meat and tendon treatmentdevice for bone glue processing comprises a fixing frame, wherein a shell is fixedly installed on the fixing frame; a feeding hopper communicating with an inner cavity of the shell is welded at the top of the shell; a rotating drum is arranged in the shell, and the outer surface of the rotating drum is slidably connected with the inner wall of the shell; a feeding port achieving communication ofan inner cavity of the rotating drum and an inner cavity of the feeding hopper is formed in the top of the rotating drum; and a driving motor is fixedly installed in the front side of the shell, and an output shaft of the driving motor penetrates through the shell and is fixedly connected with the axis of the front surface of the rotating drum. According to the bone surface meat and tendon treatment device for bone glue processing, when residual meat and tendons on a bone surface are processed, a meat and tendon separating mechanism is matched with a bone discharging mechanism, so that the removal degree of the residual meat and tendons on the bone surface is effectively improved, and the separated meat and tendons are effectively collected after the processing is completed.

The invention discloses carrageenan extraction equipment, and relates to the technical field of carrageenan preparation.The carrageenan extraction equipment comprises a base, a raw material treatment bin, a cleaning assembly, a colloid boiling assembly and an extruding assembly.The raw material treatment bin and the colloid boiling assembly are fixed to the upper end face of the base; a raw material inlet is fixed to the upper end face of the side, away from the colloid boiling assembly, of the raw material treatment bin; and one side of the raw material inlet inclines towards the side wall of the raw material treatment bin, so that raw materials can slide into the raw material treatment bin along the side wall of the raw material treatment bin; the extruding assembly is arranged on one side of the upper end face of the colloid boiling assembly; and the cleaning assembly is arranged in the side, close to the colloid boiling assembly, of the raw material treatment bin; and one end of the cleaning assembly penetrates through the raw material treatment bin and extends to the position above the extruding assembly, so that the cleaned raw materials can be put into the colloid boiling assembly through the extruding assembly.