72results about How to "Reduce adsorption efficiency" patented technology

The present invention relates to a hydrocarbon recovery method, which adopts solid absorbent to adsorb hydrocarbon. Mixed gas containing hydrocarbon first passes through uninflammable inorganic absorbent and then inflammable absorbent; the uninflammable inorganic absorbent contains silica gel, zeolite or alumina; the inflammable absorbent contains activated carbon or activated carbon fibers; and the volume ratio between the uninflammable absorbent and the inflammable absorbent is between 20 : 80 and 80 : 20. The absorbents are regenerated by adopting a vacuum regeneration method or a steam regeneration method. The present invention provides a method and a device which are used for the purification and recovery of high-concentration hydrocarbon waste gases (VOCs, organic waste gases, oil gas). Compared with the prior art, the method has the advantages of low temperature rise of the absorbents, high safety performance, high recovery benefit, etc., and the concentration of VOCs at the emission outlet of the device can meet the national emission standard. The method can be used in places and cases producing high-concentration waste hydrocarbon gases, such as oil tanks, oily sewage tanks, hydrocarbon produced in the process of oil filling in tankers and VOCs produced in the process of hydrocarbon processing.

The invention relates to an electro adsorption water treatment module, belonging to the field of waste water treatment. Supports plates (3) are arranged at both ends of the electro adsorption water treatment module, electrode plates (5) and gaskets (4) are arranged between the two support plates (3) in an alternating manner, and the electrode plates (5) comprise electrode slices (8) and collector plates (7). An insulation film and a baffle plate (9) are arranged between every pair of two electrode plates (5), and the support plates (3) of both ends are compacted to form the electro adsorption water treatment module. The uppermost and the downmost electrode plates (5) are respectively connected with an anode and a cathode of a power supply. In the invention, only the uppermost and the downmost electrode plates of the electro adsorption water treatment module are connected with the power supply, and strong electric field can be formed with a relatively large voltage, therefore, the adsorption efficiency is increased, operating voltage and operating current are more balanced, and the adsorption is more stable.

The invention belongs to the technical field of natural product preparation and especially relates to a method for adsorbing and recovering heavy metals of lead and copper by a persimmon tannin-containing metal adsorbent. The method can be widely used for adsorbing and removing lead and copper ions in waste water and has the advantages of low cost, large adsorption capacity, good environmental benefits and convenient operation. The method is characterized by comprising the following steps of 1, respectively adding a persimmon tannin-containing metal adsorbent and a lead or copper-containing mixed solution having a pH value of 4 to 6 into a reaction vessel according to a ratio of persimmon tannin-containing metal adsorbent mass (by mg) to lead or copper-containing mixed solution volume (by mL) of 1: (3 to 5), wherein the volume of the used lead or copper-containing mixed solution is less than or equal to half of the volume of the reaction vessel, 2, putting the reaction vessel into a shaking table, 3, carrying out shaking adsorption at a shaking-table rotation rate of 100 to 200rpm at a temperature of 10 to 50 DEG C for 12 to 24h, and 4, carrying out filtration so that the lead or copper ions can be reduced into metals and retained in the persimmon tannin-containing metal adsorbent. The method also can be used for adsorbing or recovering lead and copper in waste water by a chromatographic column.

The invention relates to an air purifier with double shells. The air purifier with the double shells comprises a first shell, and a second shell arranged outside the first shell. An air inlet is formed in the lower part of the first shell; an air outlet is formed in the top part of the first shell; the second shell and the first shell are random along a vertical and upward direction; a gap with acertain size is formed between the second shell and the first shell, so that the second shell can move up and down along the first shell; a second air outlet is formed, corresponding to the air outletin the top part of the first shell, in the top part of the second shell; the length of the second shell along a direction perpendicular to a floor is smaller than the length of the first shell; and the second shell moves relative to the first shell and can be fixed on an appropriate position. The invention provides a simple and practicable method, so that air purification in a larger range can berealized with lower cost, the energy consumption is reduced, and the noise is reduced.

The invention discloses a comprehensive recycling utilization method of potassium-containing wastewater generated in a synthesis process of dicamba. The comprehensive recycling utilization method comprises the following steps: adding acid into potassium-containing wastewater I generated in the synthesis process of the dicamba, and naturally depositing; conveying a water layer obtained by layering into a macroporous adsorption resin bed through a pump; adsorbing and recycling dicamba intermediates, namely 2,5-dichlorophenol and 3,6-dichlorosalicylic acid, in the water layer through the macroporous adsorption resin bed; adding active carbon and stirring and filtering; adding alkali liquid to adjust the pH (Potential of Hydrogen); adding active carbon into potassium-containing wastewater IV; stirring and filtering; conveying the wastewater into a chelating resin bed through the pump; removing high-valent metal cations in the alkaline potassium-containing wastewater IV through ion exchange; conveying the wastewater into a cation exchange resin bed through the pump; carrying out the ion exchange to obtain a potassium hydrogen carbonate solution and an ammonium chloride solution respectively; and drying an obtained potassium hydrogen carbonate wet product to obtain potassium hydrogen carbonate, or calcining the potassium hydrogen carbonate wet product at a high temperature to obtain potassium carbonate.

The invention discloses a counter-flow moving bed filter unit, which comprises a feeding system, a catalytic adsorption chamber and a deslagging system. The catalytic adsorption chamber is mainly composed of a flue gas internal-cavity circulation chamber, a bed material filling chamber and a flue gas external-cavity circulation chamber. The catalytic adsorption chamber is shaped in a double-cylinder structure: the inner cylinder is the flue gas internal-cavity circulation chamber, and the outer cylinder is the flue gas external-cavity circulation chamber. The bed material filling chamber is arranged between the outer cylinder and the inner cylinder. The upper part of the bed material filling chamber of the catalytic adsorption chamber is connected with the feeding system. A lower outlet ofthe bed material filling chamber of the catalytic adsorption chamber is provided with the deslagging system. The bottom of the flue gas external-cavity circulation chamber is provided with a flue gasinlet, and the top of the flue gas external-cavity circulation chamber is equipped with a flue gas outlet. The filter unit of the invention has advantages of simple structure, uniform flue gas flow velocity and wide application range, and especially can be used to directly purify high-temperature flue gas, thus providing favorable conditions for waste heat utilization and cooling equipment.

The deacidification of citrus juice with ion exchange resin is described. Maintaining a high acid condition of the juice is achieved by passing the juice through regenerated resin that is preconditioned with an aqueous food-grade acid, preferably citric acid. Additionally or optionally, an early bed volume or multiple early bed volumes of juice flow are at a rapid flow rate. The products obtained also are described, and they may be any deacidified citrus juice or juice blend where the pH of the juice does not rise above that of an acid food pH for the juice during deacidification. In preferred embodiments, the juice product is orange juice. In another preferred embodiment, the conditioning process is used to provide a deacidified citrus juice product while avoiding raising the pH of any portion of the juice to 4.6 or above so as to control microbial growth of the juice.

The invention provides a preparation method of conductive and super-hydrophobic functional graphene paper.The method specifically comprises the steps that graphene oxide dispersion liquid is prepared, hydrazine hydrate is added into the graphene oxide dispersion liquid, flexible paper is immersed into the mixed liquid, the temperature is increased to 85 DEG C-95 DEG C and kept for 0.5 h-24 h, and then modified paper is taken out and dried; the paper is immersed into a heptane solution of polydimethylsiloxane, then taken out to be dried and finally cured at high temperature, and then the conductive and super-hydrophobic functional graphene paper is prepared.The paper is conductive and hydrophobic, and therefore the paper can be used for adsorbing trace oil on the water surface.

The invention discloses a method for synchronously removing antibiotic and heavy metal combined pollution in water, and belongs to the technical field of sewage treatment. The method comprises the following steps: adding a glucose-based mesoporous carbon material into a water body containing antibiotics and heavy metals, adjusting the pH value of the solution to 3-7, and carrying out an oscillation reaction at 22-28 DEG C for 180 min, wherein the addition amount of the glucose-based mesoporous carbon material is 0.5 g/L. The method is simple and convenient to operate and mild in condition, andcan realize synchronous and efficient removal of antibiotic and heavy metal combined pollution in the water body.

The invention discloses an energy-saving environment-friendly circulation type waste gas treatment method applied to a paint spraying and paint baking process. The method comprises the steps of paintspraying stage waste gas treatment, levelling stage waste gas treatment and drying stage waste gas treatment; during the drying stage waste gas treatment, after the levelling is completed, the operation enters the drying stage; waste gas in a drying chamber is taken away by gas exchange equipment; the taken waste gas is filtered and dried; the treated waste gas flows back into the drying chamber to form circulation airflow; when the concentration of organic volatile gas is high, and is lower than the lower explosive limit by 25 percent, a small part of high-concentration waste gas is extractedfrom the circulation airflow; heating and low-temperature catalytic oxidation are performed to form high-temperature combustion waste gas; after the high-temperature combustion waste gas and most circulation airflow are subjected to heat exchange, freeze drying and adsorption are performed; the waste gas is exhausted into atmosphere after reaching the standard. After the method is used, the wastegas can be thoroughly treated as much as possible; the discharging total quantity is reduced to the greatest degree; the resource utilization rate is improved; the effects of energy saving and environment protection are really achieved.

The invention discloses a full-temperature-range pressure-swing adsorption method for removing hydrogen sulfide from a hydrogen rich gas source and relates to the technical field of gas desulfurization and purification. According to the technical scheme of the invention, after the full-temperature-range pressure-swing adsorption and concentration process, most of H2S in hydrogen rich gas are removed, and then remaining H2S in hydrogen rich gas can be continuously and deeply removed through selecting the pressure-swing adsorption method or the one-time adsorption method. After that, the H2S-enriched desorbed gas is directly fed into a desulfurization and sulfur-production device, and the gas amount of the above gas is reduced by 80% compared with the gas amount of raw materials. Meanwhile, the circulation volume of the desulfurizing liquid is reduced, and the energy consumption of a machine pump is reduced at the same time. The desulfurization and sulfur-production device can adopt the sodium carbonate desulfurizing and sulfur-producing process or the Claus process, and H2S in the H2S-enriched desorbed gas is removed to be about 100 ppm. Elemental sulfur foams produced during the desulfurizing process are made into sulphur by means of a sulfur retrieving device.

The invention discloses a plant hydrolat and a preparation method thereof. The preparation method comprises the following steps that S1, raw materials are treated; S2, steam distillation is carried out; S3, condensate is collected; S4, oil-water separation is carried out; S5, ultrafiltration of a crude hydrolat is carried out; S6, sterilization is caried out; S7, mixing is carried out; and S8, filling and delivery are carried out. The prepared plant hydrolat has high essential oil content, has a good moisturizing effect on skin after being used, and can achieve the effects of improving skin closed acne, shrinking pores and improving skin fineness.

The invention relates to a method for removing polar compounds from aromatic raw materials containing the polar compounds and mainly solves the problems that the adsorption efficiency of an adsorbentis low and the capability for reducing basic nitrogen impurities in the aromatic raw materials to the low content required in the liquid-phase alkylation process is still limited in the prior art. Thetechnical problems are better solved by means of the technical scheme as follows: a) the aromatic raw materials containing the polar compounds enter a rectifying column, a first material flow is obtained at the column bottom, and a second material flow is obtained at the column top; b) the material flow enters an adsorption area and makes contact with an adsorbent and the aromatic raw materials which basically do not contain the polar compounds are obtained. The method can be used for industrial production for impurity removal of the aromatic raw materials.

A high dispersible hydrophobic fine silica powder can be made, wherein the silica powder has hydrophobicity of more than 50%, triboelectrostatic charge of more than −500 μC/g, decomposition rate of an organic group on the powder surface of less than 15%, transmittance of a 5% alcoholic dispersion liquid of more than 40% preferably, and a specific surface area of more than 200 m²/g. This high dispersible hydrophobic fine silica powder can be made by mixing a hydrophobic agent comprising a volatile organic silicon compound in the gas state with a fine silica powder in a fluidized bed type reaction vessel at the time of a hydrophobic treatment, and controlling a gas flow rate to more than 5.0 cm/sec at the time of this mixing.

The invention discloses a ventilation system of an integrated house. The ventilation system comprises a fixed section and a movable section. The end of the fixed section penetrates through a ceiling and then forms an air inlet. A plurality of supporting pipes are connected to the movable section, penetrate through the ceiling and then form air outlets. A guiding rail is arranged on the inner wall of a floor. A dovetail groove is formed in the guiding rail. One end of a connecting rod is matched with the dovetail groove and slidably arranged in the dovetail groove. The other end of the connecting rod is connected with the movable section. The movable section communicates with the fixed section through a connecting hose. A fan, a baffle plate with holes, a negative electricity grating plate and an activated adsorption assembly are mounted in the fixed section in sequence. The air inlet end of the fan communicates with the air inlet. The air outlet end of the fan directly faces the baffle plate. A positive electricity tungsten filament is arranged between the baffle plate and the negative electricity grating plate. The activated adsorption assembly directly faces the connecting hose. By adjusting the position of the movable section, the size of purifying space is adjustable, so that the poor purifying effect of indoor air or energy resource waste is avoided.

The invention relates to preparation of a magnetic hydrotalcite material and a determination method of trace F and Cl anions in a phosphorus-rich sample. Phosphate radicals in the phosphorus-rich sample are adsorbed by utilizing the prepared magnetic hydrotalcite material, ion chromatographic analysis is performed on a sample solution, and the content of the trace F and Cl anions can be calculated. When trace anions in a high phosphate matrix are measured by ion chromatography, high-concentration phosphate can cause the chromatographic peaks of trace F and Cl anions to be covered or deformed on one hand, and can cause a chromatographic column to be overloaded on the other hand to influence the service life of the chromatographic column and even cause ghost peaks to influence the measurement result of the next needle. With the preparation of the magnetic hydrotalcite material and the determination method adopted, the above problems can be solved. The prepared magnetic hydrotalcite material does not adsorb the F and Cl anions while adsorbing the phosphate radicals, and therefore, the adsorption material can be separated from the original solution by virtue of a magnet, and the magnetic hydrotalcite material can be repeatedly and reliably used for measuring the content of trace F and Cl anions in phosphorus-rich samples such as phosphate glass and phosphorus-rich wastewater afterbeing subjected to desorption treatment.

The invention discloses a method for preparing carbon nano particles and carbon dots by using activated carbon as a precursor. The method is characterized by comprising the following steps: taking theactivated carbon, performing drying, and performing grinding to obtain powder; adding the powdery activated carbon into an oxide aqueous solution, performing stirring at room temperature, performingheating to temperature of 30-130 DEG C, and performing a reaction for 12-48 h; allowing the obtained material to stand, extracting the supernatant part, adding deionized water, performing concentration for 5-10 times, and performing dialysis by using a dialysis membrane with 100-500 D; mixing an aqueous solution containing the carbon nano particles and a compound containing amino or other functional groups by using deionized water as a medium, performing heating, and performing a heat induction reaction to obtain a crude product of carbon nano particles with a modified surface containing an organic passivation layer; and performing post-treatment to obtain the carbon dots. According to the method disclosed by the invention, the prepared carbon nano particles can be used for functional fillers such as conductive materials, nucleating agents, nano carriers and the like, and the prepared carbon dots can be used as a fluorescent marker, a sensing or detecting probe, and a photocatalyst andused in photoelectric conversion devices such as LEDs.

The invention provides a preparation method of graphene modified hydrophobic activated carbon. The method comprises the following steps: uniformly mixing shell powder with a ZnCl2-HCl solution; addinggraphene and a home-made dispersing agent at the same time, wherein the home-made dispersing agent is a mixed aqueous solution of polyvinylpyrrolidone and sodium lignosulfonate, and carrying out ultrasonic treatment for 30-60min in an ultrasonic apparatus so as to enable the graphene and the shell powder to be uniformly mixed and evenly dispersed in the solution; carrying out a reaction, drying,then grinding, tabletting, and carbonizing; after the carbonization is finished, cooling to the room temperature, washing the sample for a plurality of times with distilled water until the product isneutral, and drying to obtain the graphene modified hydrophobic activated carbon. The graphene modified hydrophobic activated carbon prepared by the method is low in water absorption, and the heat conductivity coefficient of the graphene modified hydrophobic activated carbon is 3-5 times of that of the common commercial activated carbon.

The invention relates to a device for producing alkylated aromatic compounds and mainly solves the problem that the capacity for reducing basic nitrogen impurities in aromatic raw materials to low content required by a liquid-phase alkylation process is still limited because of low adsorption efficiency of an adsorbent in the prior art. The problem is better solved by means of the technical schemeas follows: the device comprises a) a rectifying tower, b) an adsorption area and c) an alkylation area, wherein the rectifying tower is used for performing rectifying separation on aromatic raw materials containing polar compounds, first material flow is obtained at the tower bottom, and second material flow is obtained at the tower top; in the adsorption area, the first material flow is enabledto be contacted with the prepared adsorbent, and aromatic raw materials containing no polar compounds basically are obtained; in the alkylation area, the aromatic raw materials containing no polar compounds basically are contacted with an alkylating agent under the liquid-phase alkylation condition, and the alkylated aromatic compounds are produced accordingly. The device can be applied to industrial production of the alkylated aromatic compounds.