1318results about How to "Easy to dehydrate" patented technology

A method of processing stillage from fermentation derived alcohol is disclosed, including dry-grind ethanol production from corn, by fermentation with filamentous fungi. This produces high-value fungal biomass that can be recovered by screening, is easily dewatered and used as an animal feed, human food or as a source of nutraceuticals. The methodology uses an airlift reactor to enhance the morphology of the fungi for easy harvesting and separation of water for recycling and reuse and to recover added enzymes and mineral acid with the water. The process also separates oil from the stillage. The fungal processing removes organic substances from the water that are otherwise inhibitory to the reuse prospects for the water, i.e. suspended and dissolved organic matter, including glycerol, lactic and acetic acids. The process also separates oil from the stillage by enmeshing the oil in the fungal biomass and can produce more oil through cultivation of oleaginous fungi. This approach generates revenue from low value thin stillage, while substantially reducing stillage processing costs, mainly by averting the need for evaporation of the thin stillage.

The invention provides new methods for synthesis of percarbonic acid and methods of using percarbonic acid compositions for the treatment of substrates. The invention is particularly useful for cleaning, disinfecting and/or sterilizing a substrate using percarbonic acid or a percarbonic acid-carbon dioxide mixture. The invention further provides an apparatus suitable for use in the substrate treatment methods provided herein. The invention also provides methods and apparatus for the real time monitoring of the treatment processes provided herein.

The invention discloses a preparing method of an oil field demulsifier. The preparing method adopts ethyleneamine as a raw material, and the oil field demulsifier is prepared by crosslinking modification of the ethyleneamine, ethylene oxide, and propylene epoxide. The method comprises the following steps of: with the ethyleneamine as an initiator, enabling the ethyleneamine to react with propylene oxide and ethylene oxide to prepare an ethyleneamine type polyether demulsifier under the existence of a basic catalyst; carrying out self-crosslinking reaction on the polyether demulsifier A by adopting polycarboxylic acid under the action of a catalyst to prepare a product B; and finally carrying out self-crosslinking reaction on the polyether demulsifier A and the product B in a solvent by adopting toluene diisocynate to prepare a high performance demulsifier as a final product. The demulsifier prepared by the preparing method has the advantages of higher relative molecular weight, favorable dehydration effect and favorable broad spectrum, and can be used for demulsification and dehydration of the crude oil in the oil field. The dehydrated water is clear, and the dosage of the demulsifier is less.

The invention discloses a modularized integrated smoke purification system and method for removing a plurality of pollutants. The system comprises an absorption tower, wherein a smoke inlet is arranged in the lower end of the absorption tower; the absorption tower is internally provided with a spraying device which is located above the smoke inlet and is used for spraying an absorbent, a first wet-type electric precipitation device located above the spraying device, and a second wet-type electric precipitation device located above the outer side of the absorption tower; and a smoke uniform distributor is arranged between the first wet-type electric precipitation device and the second wet-type electric precipitation device. The invention further discloses a method for carrying out smoke purification by using the system; the pollutants existing in an aerosol form, including SO2, NOX, superfine smoke dust, SO3 acid fog, mercury and the like in the smoke, can be intensively removed; gypsum rain is prevented and an environment is protected; and the smoke purification efficiency is improved.

The invention discloses a polymer nano-silica temperature-resistant, salt-tolerant and fluid loss reducing agent and a preparation method thereof. According to the preparation method, in the presence of nano-silica, a polymer-base nanometer composite material with amphiphilic block hydrophobic associating polymer wrapping inorganic nano-silica is successfully synthesized by virtue of a micellar emulsion polymerization method and combines the rigidity and the heat stability of the inorganic nano-silica and the characteristics of the amphiphilic block hydrophobic associating polymer together, and the temperature resistance, the salt tolerance and the thickening property of the polymer are obviously improved by virtue of the polymer-base nanometer composite material on the basis of the existing good performances of the amphiphilic block hydrophobic associating polymer. As a temperature-resistant, salt-tolerant and fluid loss reducing agent for a drilling fluid in the drilling engineering, the polymer nano-silica temperature-resistant, salt-tolerant and fluid loss reducing agent has a remarkable fluid loss reducing effect under high temperature and high salinity.

The invention discloses a method of reducing the town sewage and sludge and managing the resource belonging to solid waste treating technical field. The method is provided with following steps: diluting and breaking the dehydrated mud cake by sodium hydroxide solution, and stripping a large amount of organic matter in sludge, getting concentrated sludge and supernatant fluid by centrifugation; dehydrating the former after neutralization and regulation; obtaining a concentrated liquid and a filtered liquid after wind filtering and secondary ultrafiltration of the latter. The supernatant fluid contains lots of sodium hydroxide, and is reflowed to cycle. After disposal, the rate of water content of the dehydrate mud cake is reduced to about 70%, lowering 50% compared to the organic matter content before disposal, and lowering 2/3 of total mass. The concentrated liquid after ultrafiltration is mainly composed of organic matter with a large molecule such as humic acid, and with a low content of heavy metal. The pathogenic bacteria is deactivated which accords to the ''fertilizer utilization criteria'' of Ministry of Agriculture to produce a safe and efficient liquid organic fertilizer. The invention is suitable for the residual active sludge generated from the town sewage treating factory, for digesting the sludge and reducing the composite sludge and for managing the resource.

The invention relates to a low temperature and low hydration heat cementing concrete system used in the natural gas hydrate layer cementing field. The objective of the invention is to effectively reduce the heat release of the cement hydration, prevent the hydrate from decomposing because of large heat and reduce the harm of the hydrate to the cementing. The whole performance of the cement under the low heat release condition is improved by adding materials which can reduce the whole hydration heat release of the cement using G grade oil well cement as base material. (1) The proper addition of superfine slag with a specific surface area between 6000 and 12000cm2/g can make sure the strength properties of the early and later stage of the cement. (2) The hydration heat is further reduced by adding fly ash with a lower hydration activity. (3) An amount of gypsum component is added so that the cement paste has certain expansion property at a low temperature to prevent the cement paste shrinking at a low temperature. The low temperature and low hydration heat cementing concrete provided by the invention has an obvious effect for reducing the whole cement hydration heat and a good effect for preventing the deep water hydrate decomposition.

The invention relates to a compound demulsifier and a use method thereof. The compound demulsifier comprises alkyl ester of styrene-maleic anhydride copolymer and ethylene oxide-propylene oxide block polymer, the mass ratio of which is 0.1 to 10: 1. The compound demulsifier of the invention, through compound use of the alkyl ester of styrene-maleic anhydride copolymer and the ethylene oxide-propylene oxide block polymer, can achieve better demulsification effect and is particularly applicable to the demulsification and dehydration of high-asphaltene viscous oil.

The invention relates to a deep dehydration device and deep dehydration method for organic materials and belongs to the field of sludge treatment. The deep dehydration device and the deep dehydration method are used for realizing the deep dehydration of organic granular materials. The deep dehydration method for the organic materials comprises the following steps: (a) carrying out pretreatment: stirring the organic granular materials, and adjusting the additive, moisture content and temperature of the organic granular materials; (b) carrying out thermal hydrolysis: putting the organic granular materials pretreated in the step (a) into a hydrolysis tank, carrying out thermal hydrolysis on the organic granular materials so as to destroy sticky organic substances outside granules of sludge or mud materials and liberate biochemical water organic matters contained in the granules, and thus, hydrolyzing the biochemical water organic matters contained in the granules; (c) carrying out thermal oxidation: putting a thermal hydrolysis product obtained in the step (b) into an oxidation tank, and carrying out thermal oxidation on the thermal hydrolysis product so as to release biochemical water; (d) carrying out solid-liquid separation: dehydrating a product obtained in the step (c), wherein after dehydration, a solid substance can be directly recovered as a solid organic fertilizer, and a liquid substance can be concentrated and oxidized as a liquid organic fertilizer.

A system for easy organizing and storing of food items within a refrigerator or cooling unit comprising one or more stackable modular assemblies each having a housing unit and one or more slidably insertable drawers having flexible substantially transparent or translucent drawer covers and are configured for containing a variety of rearrangeable and removeable food storage trays. Each housing is vented to increase air circulation at drawer bottom, sides and back. Each drawer is easily removeable from the housing and may be used as a serving tray. Each drawer cover is may be positioned on the peripheral support edge of the drawer to seal the drawer as well as the open trays positioned therein without inhibiting movement of the drawer within the housing. A user can easily identify food within the drawer, partially slide the drawer from the container, and lift the drawer cover to access food items quickly.

The invention relates to a crystallizer for hydrolyzing carnallite. The crystallize comprises an inner cylinder, an outer cylinder, a mother solution distributor, a stirring paddle, a crystallizer cylinder body, a low-sodium carnallite inlet, a mother solution inlet, a decomposition liquid outlet and a product outlet. According to the crystallizer, the remaining time of low-sodium carnallite in a dissolving region can be prolonged, and the problem that low-sodium carnallite is not fully mixed and decomposed and then overflows to the bottom of the crystallizer from the upper part of the inner cylinder in the existing crystallizer is solved; and generated potassium chloride particles can grow above 0.2mm in particle size to ensure that solid potassium chloride is easily dewatered and dried, and washing water and heat energy required by drying are saved.

The invention relates to a filtrate loss reducer for high-temperature-resistant oil field drilling fluid, a preparation method of the filtrate loss reducer, and application of a treatment agent. A novel high-temperature-resistant filtrate loss reducer is synthesized by implementing the following steps: adopting lignin, acrylamide and 2-acrylamide-2-methyl propanesulfonate as synthetic monomers; enabling the synthetic monomers to perform graft copolymerization under the initiation of potassium peroxodisulfate, ammonium ferrous sulfate hexahydrate and hydrogen peroxide respectively; adding a crosslinking agent, namely N,N-methylene bisacrylamide to enhance the stabilizing force of the synthetic monomers under high temperature condition. The filtrate loss reducer disclosed by the invention adopts waste materials of a paper-making factory, is extensive in source and low in cost, and can be used for absorbing the excellent viscosity reduction capacity of lignin; the introduced acrylamide and 2-acrylamide-2-methyl propanesulfonate can be used for improving the precipitation capacity at a high temperature; N,N-methylene bisacrylamide is added as the crosslinking agent to ensure that a network structure is formed, the high temperature resistance can be improved, an oil and gas layer can be protected from collapsing, and the service life of an oil well can be prolonged. A product disclosed by the invention is applied to the oil field drilling fluid.

The invention discloses a preparation method of a demulsifier for oil fields. In the method, fatty alcohol is used as a raw material, and the demulsifier is prepared by crosslinking and modifying after reacting the fatty alcohol with oxirane and epoxypropane. First, the fatty alcohol is used as an initiator, and a polyether demulsifier A is prepared by reacting the fatty alcohol with propylene oxide and ethylene oxide in the presence of a basic catalyst. Then, a product B is prepared by carrying out self-crosslinking reaction on the polyether demulsifier A with polycarboxylic acid under the action of the catalyst. Finally, a final product, i.e. the high-performance demulsifier, is prepared by carrying out self-crosslinking reaction on the polyether demulsifier A and the product B in a solvent with adoption of toluene diisocynate. The demulsifier prepared with the method has the advantages of high relative molecular weight, ideal dewatering effect and good broad spectrum property, and can be used for demulsifying and dewatering oil field crude oil. Separated water is clear, and the use amount of the demulsifier is small.

The invention relates to a squeezing type sludge dehydrating device and operation method, belonging to a technical field of sludge dehydrating device. The device comprises a housing, a material vat, and a hydraulic cylinder, wherein the material vat and the hydraulic cylinder both are arranged on the housing, the hydraulic cylinder is arranged above or below the material vat; the material vat is cylindrical, the upper end of the material vat is open and the lower end is closed, water outlet holes are distributed on sidewalls of the material vat; the upper end of the material vat is provided with a press plate that is matched with the inner diameter of the material vat, the back of the press plate is connected with the piston of the hydraulic cylinder or the slide plate at the upper part of the housing, the housing is provided with a locator, the material vat is arranged fixedly on the chassis of the housing, the upper part of the material vat is provided with a material inlet; a water baffle disc is arranged at the bottom of the material vat; the hydraulic cylinder is provided with a hydraulic oil pipe, when the hydraulic cylinder is started, the piston of the hydraulic cylinder drives the press plate to move in the material vat or drives the material vat to move upwardly, so as to apply force on the sludge in the material vat, when the sludge in the material vat is squeezed by the press plate repeatedly , the water content of the sludge is reduced.

The invention discloses a method for preparing an attapulgite/carbon composite adsorbent by one-step carbonization-activation. According to the method, nature attapulgite clay with low cost and a biomass cellulose carbon source are taken as raw materials, ZnCl2 is taken as an activating agent, and the attapulgite/carbon composite adsorbent is prepared by a one-step calcination method. According to the method, amorphous carbon with an organophilic property can be supported on the surfaces of attapulgite crystals, and the specific surface area of a composite can be further greatly enlarged by activation and pore-forming effects of ZnCl2. Compared with the natural unmodified attapulgite clay, the removal rate against pollutant methylene blue in water of the composite adsorbent after activation is greatly improved. According to the method disclosed by the invention, the sources of the raw materials are extensive, the price is low, the preparation process is simple, and the reaction conditions are mild; and the adsorption capability of the attapulgite/carbon composite adsorbent prepared by the method disclosed by the invention against pollutants in water is obviously upgraded, and the attapulgite/carbon composite adsorbent can be used for advanced treatment of the organic pollutants in the water.

The invention discloses a wedge-shaped draper-type press filter which consists essentially of a chassis, a pressing area, a driving device, a feeding device, a scrapper assembly, a deviation-rectifying device, a rinsing device and a water receiving device. The structure of the wedge-shaped draper-type press filter is characterized in that the pressing area is a wedge-shaped pressing area with an included angle more than zero degree but less than 15 degrees between an upper filter strip and a lower filter strip; the wedge-shaped pressing area is divided into an upper press area and a lower press area; respective tension band and filter strip of the upper press area and the lower press area are stacked and wrapped outside respective press roll in parallel; the tension band is stuck to the press roll and the filter strip is firmly stuck outside the tension band; the press rolls of two press areas are arranged in a counter pressure way. The draper-type press filter of the invention adopts a single wedge-shaped press area, changes press dehydration technique of the prior art that adopts a plurality of press rolls to enwind and operate in snaking way, realizes that the press roll operates press dehydration in a counter pressure and liner way, greatly reduces the abrasion of the filter strips caused by tension, effectively prolongs the service life of the filter strips and can reduce operation energy consumption of the press filter.

The invention provides a temperature-resistant and salt-resistant latex blocking agent. The latex blocking agent is prepared from, by weight, 100 parts of hydrophobic monomers, 0.5-25 parts of hydrophilic monomers, 0.1-10 parts of emulgator, 0.01-5.5 parts of a buffer agent, 0.01-4.5 parts of molecular weight modifier, 0.01-6.9 parts of a protective agent, 0.01-2.3 parts of initiator and 67-172 parts of deionized water. The latex blocking agent has good blocking and water loss reduction effects and is resistant to high pressure and high temperature, and a formed mud cake is dense, thin and tough.

The invention discloses a magnetic ore rescreening process for mixed iron ore. The process comprises the following process steps: performing primary ore grinding, performing primary grading, performing primary low intensity magnetic separation, performing primary strong magnetic separation, rescreening, performing high frequency screening and performing secondary ore grinding and selecting. According to the invention, partial qualified iron ore concentrate and partial tailings are thrown out preferentially under the condition that the dissociation degree of useful mineral monomers is insufficient after the primary ore grinding operation, the amount of materials subjected to secondary regrinding and reselecting is reduced, and the aim of reducing the ore dressing cost is achieved.

An aqueous slurry composition for use in industries such as the petroleum and pipeline industries includes a particulate, an aqueous liquid and a chemical compound that renders the particulate surface extremely hydrophobic. The slurry is produced by rendering the surface of the particulate extremely hydrophobic during or before making the slurry.

The invention relates to a high-concentration anaerobic sludge digestion treatment process for carrying out mechanical dewatering on sludge, comprising the following steps of: conveying sludge with high water content into a concentration tank, wherein the water content of the concentrated sludge is reduced to 97 percent, and a supernate reflexes to a sludge treatment system; carrying out mechanical pre-dewatering on the concentrated sludge, wherein the water content is about 88-90 percent after the mechanical pre-dewatering; then carrying out anaerobic digestion on the pre-dewatered sludge under the high concentration condition by adopting a CSTR (Continuous Stirred-Tank Reactor); and further dewatering the sludge after anaerobic digestion, wherein the water content of a treated sludge cake is about 75 percent. The invention has following advantages and positive effects: by adopting the technical scheme, the dewatering effect of the sludge is favorable, the volume of an anaerobic sludge digestion tank is greatly shortened, and the capital construction investment and the operation cost of a sewage treatment plant are reduced; the load of organic matters in the sludge can be effectively improved by carrying out pre-dewatering on the sludge; and the CSTR anaerobic sludge digestion which is suitable for the high-concentration solid materials is used for treatment, which is beneficial to sludge resource utilization.

The present invention discloses a novel sludge dehydrating agent, a preparation method and applications thereof, and belongs to the sludge treatment field, wherein poly aluminium chloride, calcium oxide, ferric sulfate, bentonite, starch, and polyacrylamide are mixed according to a certain ratio, and then drying is performed for 20-40 min at a temperature of 80-100 DEG C to prepare the novel sludge dehydrating agent. According to the present invention, the novel sludge dehydrating agent has the good dehydrating effect, the water content of the dehydrated sludge is 40-50%, the polyacrylamide content is low, the environmental pollution is low, the preparation process is simple, the cost is low, and the novel sludge dehydrating agent is suitable for large-scale sludge dehydrating treatment.

The invention discloses a method for improving dewaterability of activated sludge through addition of a microbial flocculant. According to the method, Klebsiella pneumoniae capable of generating the microbial flocculant is separated, purified and screened from activated sludge in a sewage treatment plant, then shake fermentation cultivation is carried out at a temperature of 25 to 40 DEG C at a rotating speed of 100 to 200 r/min for 2 to 3 d, and a flocculant sample is extracted from fermentation supernatant through frozen ethanol precipitation; and the microbial flocculant is added into an activated sludge sample, specific resistance of filtration (SRF) and water content of the regulated sludge are respectively reduced to 4.66*10<12> m/kg and 83.74%, and compared to chemical flocculants like aluminum sulfate and poly aluminum chloride (PAC), the microbial flocculant enables a better dewatering effect to be obtained. The microbial flocculant has good adaptability to characteristics like sludge salt waste and a pH value, and the regulated activated sludge has substantially improved dewaterability and the advantages of easy biodegradability, high efficiency, no toxicity, etc.