180results about How to "Restore adsorption capacity" patented technology

The invention relates to a PACT (powdered activated carbon treatment) process and an PACT process device. The activated carbon-microbial zoogloea culture method comprises the following steps: selecting activated sludge, and culturing until the activated sludge is mature; and adding powdered activated carbon to ensure that the powdered activated carbon serving as a core is wrapped by microorganisms to form activated carbon-microbial zoogloea floccules, and acclimating, thus increasing the specific gravity of the powdered activated carbon and enhancing the precipitability. In the PACT process device, a sludge return tank is added, and the powdered activated carbon is added into the sludge return tank, so that the powdered activated carbon and the microorganisms can form activated carbon-microbial zoogloeae in the sludge return tank, thereby prolonging the retention time of the powdered activated carbon in a water treatment system; and sludge in the sludge return tank is lifted into a sewage inlet at the front end of an aerobic tank through a lifting pump, so that the sludge and sewage can be better mixed, thereby prolonging the retention time of the powdered activated carbon in the aerobic tank and enhancing the treatment effect. On the basis of prolonging the water retention time of the aerobic tank, the invention does not need to increase the volume of the original aerobic tank, and is small in occupied area and easy to implement.

A process for diesel oil distillation oxidation sweetening comprises, adding in 0.1-20% diesel oil distillation volume of hydrogen dioxide and 0.1-20% acetic anhydride, reacting at the temperature of 30-90 deg. C, wherein the sulfide is oxygenized into sulfone or sulfoxide compounds, rinsing to remove acidic material, and removing sulfone or sulfoxide compounds from the diesel oil through adsorptive separation method. The catalyst has good regeneration effect and thus can be reutilized.

The invention discloses a heat recovery type oil gas recovery device adopting condensation and temperature swing adsorption and pressure swing adsorption combined technology. The device comprises a first refrigerating system, a second refrigerating system, a third refrigerating system, an oil gas condensation and oil product collecting system and a heat recovery type adsorption system, wherein thethird refrigerating system is an overlapped type refrigerating system and is used for supplying a lower-temperature cold source to condense light hydrocarbon components in oil gas. Three-stage condensation is adopted for condensing oil gas and recovering oil products; an activated carbon pressure swing adsorption mode is adopted for deeply purifying oil gas to meet discharge requirements; heat sources of the refrigerating systems are utilized for completing desorption through a vacuum mode; and free cold sources of the refrigerating systems are utilized for enhancing the adsorption effect. The device disclosed by the invention has the advantages that the energy utilization rate is improved, the cold capacity and the heat capacity of the oil gas are fully utilized for performing exchange,the cold sources and the heat sources generated by the refrigerating systems are utilized for supplying cold capacity and heat capacity for adsorption and desorption to form optimal operation states of low-temperature adsorption and high-temperature desorption, the efficiency is high, the energy is saved, and the advantages of pressure swing adsorption and temperature swing adsorption are combined.

An apparatus and related methods for removing hazardous trace elements from hydrocarbon reservoir effluent is implemented by placing an adsorbing volume of material designed to adsorb the hazardous trace elements into the vicinity of a producing formation face at a downhole location; and letting the reservoir effluent flow through the volume of adsorbing material

The invention relates to the field of bioremediation of rivers, and in particular relates to a composite microbial preparation for watershed bioremediation as well as a preparation method and application thereof. The microbial preparation comprises active ingredients including bacillus natto, candida utilis and rhodopseudomonas palustris which are mixed together in a volume fraction ratio of 1:1:1; the microbes for water treatment are combined with zeolite to prepare a comprehensive preparation for water treatment; the specific gravity of the obtained comprehensive preparation for water treatment is greater than that of water, so that the obtained comprehensive preparation for water treatment quickly sinks to the bottom of water and can not be washed away by water flow easily; the zeolite is used as a carrier for the microbes to grow, and can provide certain nutrition substances required by growth for the microbes while adsorbing pollutants, and the microbes attached to the zeolite perform decomposition and anabolism on the pollutants to ensure that the zeolite restores the adsorptive property, so that a virtuous cyclic process is formed. The microbial agent provided by the invention can adapt to fresh water and seawater environments at the same time, and has an effective bioremediation effect on watercourses of certain coastal cities, wherein the water quality of the watercourses has fresh water and seawater alternating conditions along with seasonal changes.

The present invention relates to a preparation method of adsorbing agent capable of simultaneously removing ammonia nitrogen, calcium ion and magnesium ion in the waste water. Said invention uses NaY molecular sieve as main raw material, after said main raw material is mixed with aluminum hydroxide dried gel powder, sesbania powder, organic acid and inorganic acid uniformly, the above-mentioned mixture can be undergone the processes of forming and roasting so as to obtain the invented absorbing agent. As compared with general NaY molecular sieve said invented adsorbing agent can greatly raise its capacity for adsorbing ammonium ion, at the same time can remove the calcium ion and magnesium ion in the treated water, and the outlet water also can be used as supplementary water of circulation cooling water.

The invention relates to a method for regenerating saturated active carbon adsorbing organic matters through microwave activation of potassium persulfate. The method comprises the following steps of: adding a potassium persulfate solution into saturated active carbon; performing microwave irradiation for 5 to 30 minutes; cooling to room temperature; and filtering and cleaning to obtain regenerated carbon, wherein the mass ratio of the saturated active carbon to the potassium persulfate is (1-5):1. Compared with the traditional active carbon regeneration method, the method has the advantages that the regeneration cost is reduced and the regeneration efficiency is improved. Advanced oxidation and microwave irradiation of persulfate are organically combined, so the regeneration efficiency of the active carbon is improved. A chemical catalyst is not used, so new pollutants are not introduced. Due to the action of microwave, the oxidation time is short, the regeneration time is shortened, and the regeneration efficiency is improved and can reach about 80 percent. According to the method, regeneration can be performed for times, namely more than eight times, and the mass loss and the strength loss of the active carbon after regeneration are small.

The invention discloses a calcium oxide-based high-temperature CO2 adsorbent and a preparation method thereof. The adsorbent comprises a carrier M and a main active component CaO loaded on the carrier M. The carrier M is further loaded with a structural stabilizing aid A. The general formula of calcium oxide-based high-temperature CO2 adsorbent is <x>CaO.A.<100-x-a>M, wherein x is the mass percentage of CaO; a is the mass percentage of A; x is no less than 5% and no more than 60%; and a is no less than 0.1% and no more than 50%. The calcium oxide-based high-temperature CO2 adsorbent in the invention has high wear resistance, high thermal stability and high activity; the adsorbent loses no more than 20% of CO2 adsorption capacity after 40 adsorption-desorption cycles and has a wear rate is 0.1 to 1 wt%/h; the adsorbent can be prepared by using individual impregnation solutions or a mixed impregnation solution; and the preparation method provided by the invention is simple in process, free of production of waste water, friendly to environment, easy to repeat and especially suitable for large-scale industrial production and application.

The invention relates to a micro pollution source water in-situ purification system, comprising pumping equipment and a plurality of zeolite filling devices; the pumping equipment is vertically arranged in water, and the zeolite filling devices are distributed in a circle way by taking the pumping equipment as a center, and the zeolite filling device and the pumping equipment are fixedly connected by a rope; the water body flows in a circulating way by the pumping equipment, so as to drive the alga to a light limit area at the bottom part of the water body and control the alga to grow; when water current flows through the zeolite filling device, the zeolite can adsorb and remove pollutants such as ammonia nitrogen in the water, and the microorganisms growing in a filler area inherently can further remove the ammonia nitrogen by nitrification, so as to realize filler organism regeneration; the system can be used for in-situ alga control of micro pollution source water (lake, reservoir and the like), biological oxidation ammonia-nitrogen removal and adsorbing and filtering organic matters and suspended particles synchronously by the zeolite, so as to promote the water quality of a water head area.

The invention belongs to the technical field of environmental protection, and relates to an integrated purification technology of flue (waste) gas, in particular to a conversion device of desulfurized and denitrified side products of active-coke flue gas, a desulfurizing and denitrifying system and a method. The conversion device comprises an absorbing tower, an alkali preparation unit, an intermediate-product storage tank, a neutralizing kettle, an evaporator, a concentrated-material tank, a centrifugal unit and a drying device, wherein the absorbing tower is provided with a gas inlet end which is connected with a output end of sulfur-dioxide gas released in the desulfurizing and denitrifying system of the active-coke flue gas; and the alkali preparation unit, the absorbing tower, the intermediate-product storage tank, the neutralizing kettle, the evaporator, the concentrated-material tank, the centrifugal unit and the drying device are connected in sequence. The conversion device, the desulfurizing and denitrifying system and the method have the advantages that the production additional value of the desulfurizing and denitrifying system of the active-coke flue gas can be increased, and the economic benefit can be improved, so that the economic and environment-friendly effects are achieved; the process is simple, the layout is compact, the energy consumption is low, and no waste water, solid waste and secondary pollution are caused, so that the resource recycling is realized.

The invention provides a desorption regeneration method of a hydrophobic macroporous polymer adsorbent adsorbed with butanol. The method disclosed herein comprises the steps of using water-soluble low-boiling polar solvent and water to successively elute the hydrophobic macroporous polymer adsorbent adsorbed with butanol. According to the invention, after a solution containing butanol (e.g. butanol fermentation liquor) is adsorbed by the hydrophobic macroporous polymer adsorbent, by using the desorption regeneration method disclosed herein, the full dissolution and desorption of the adsorbed butanol in the adsorbent can be realized; in addition, the regeneration treatment can be directly carried out on the adsorbent on a fixed bed where the butanol fermentation liquor is adsorbed, and the adsorption process of the next stage can be directly conducted without taking out the adsorbent from the fixed bed, thus a lot of time is saved, and the regeneration efficiency is raised. The method disclosed herein has the advantages of simple process, short separation time, easy, rapid and complete desorption and regeneration, low investment of devices, low pollution, and low energy consumption, and is easy for large scale production.

The invention belongs to the technical field of tea deep processing, in particular to a method for extracting natural tea polyphenol. The method comprises the following steps: enabling water solution containing the tea polyphenol to flow through an adsorption column for filling an inorganic zeolite molecular sieve at the temperature of 0-75DEG C; eluting with deionized water and 5-50 percent water solution of ethanol; collecting eluent of the water solution of ethanol; and ultrafiltering and drying to obtain a tea polyphenol product the purity of which is high than 95 percent and the content of caffeine is lower than 1.0 percent. The method has the advantages of safe, simple and convenient operation flow and low energy consumption; the obtained tea polyphenol has high purity, low content of caffeine and less consumption of organic solvent; and the used adsorbent can be repeatedly used. The invention is applicable for separating and extracting the tea polyphenol from tea water leaching liquid, particularly applicable for treating low-grade tea to improve the added value or is used for leftovers and waste liquor containing the tea polyphenol in the deep processing of the tea.

The invention belongs to the technical field of activated carbon manufacturing and relates to a regeneration system and preparation method for waste activated carbon, especially to a regeneration system and regeneration method for waste activated carbon. The regeneration system for waste activated carbon comprises a waste activated carbon treatment unit, a mixing and granulating unit, a drying andcarbonizing unit and a finished product cooling unit which are mounted in sequence, wherein the waste activated carbon treatment unit is used for introducing waste activated carbon and screening, mixing, neutralizing and washing the waste activated carbon; an adhesive is added into a washed secondary raw material through the mixing and granulating unit, and extrusion is conducted to form semi-finished particles, and if a fed material is granular activated carbon, treatment via the mixing and granulating unit is not needed; the particles are subjected to drying, carbonizing and activating through the drying and carbonizing unit so as to form a high-temperature finished product; and the high-temperature finished product is cooled by the finished product cooling unit to form a finished product.

The invention provides a regeneration method of waste activated carbon and application. The regeneration method of the waste activated carbon comprises the following steps of conducting primary vacuumpyrolysis on the waste activated carbon to obtain first treated activated carbon; mixing the first treated activated carbon with a regeneration solvent, and conducting vibration treatment after solid-liquid separation to obtain second treated activated carbon; conducting insulation treatment on the second treated activated carbon, and conducting secondary vacuum pyrolysis to obtain regenerated activated carbon. According to the application of the regeneration method of the waste activated carbon, the regeneration method is used for regeneration of the waste powdered activated carbon in the decoloring stage of medicine production. According to the regeneration method of the waste activated carbon, the regeneration efficiency is high, and the period is short. In the regeneration process, noacid-base waste liquor is generated, and the regeneration solvent can be recycled multiple times after being distilled and recycled. The adsorption capability and the specific area of the activated carbon are restored, and the index of the regenerated activated carbon reaches or even exceeds that of new activated carbon.

The invention discloses an electrostatic purification and water mist integrated air purifier and belongs to the field of air purification. The electrostatic purification and water mist integrated airpurifier comprises an air purification mechanism, wherein an air exchange mechanism in the air purification mechanism is used for introducing external air into a shell of the air purification mechanism and purifying; a barrel-shaped electrostatic purifier is arranged on a base plate of the air purification mechanism and the upper side of the barrel-shaped electrostatic purifier is sealed; the barrel-shaped electrostatic purifier is used for carrying out first-grade air purification; a flying disc type electrostatic purifier is supported through a flying disc bracket, is located above the barrel-shaped electrostatic purifier and is used for carrying out second-grade air purification; a water mist spraying device is used for spraying water mist to the barrel-shaped electrostatic purifier and/or the flying disc type electrostatic purifier. According to the electrostatic purification and water mist integrated air purifier, intermittent working match of the electrostatic purification and water mist purification is adopted so that an air purification effect of the device is extremely improved when the device works continuously and the electrostatic purification and water mist integratedair purifier is suitable for being used for air purification and dust removal.

The invention discloses a technology for regeneration of waste activated carbon for adsorbing saturated chlorohydrocarbon organic compounds and treatment of waste gas thereof. A method is characterized in that the drying, heating and regeneration, carbon dioxide and water steam activation and the like are continuously performed on the waste activated carbon by a rotary kiln, and the acid oxidizingand other methods are used for activating. The technology has the advantages that the regeneration time is short, the restoration rate is high, and the adsorption property of the regenerated activated carbon is excellent; for a large amount of high-temperature tail gas of chloride-containing organic waste gas, the self high-temperature heat and water steam are used for catalytic reforming reaction, and the catalytic reforming efficiency can reach 100%; the organic waste gas is converted into hydrogen gas and other combustible gases, so that the waste resources can be recycled and reutilized,and the secondary pollution to environment is avoided.

The invention discloses a process and equipment for treating wastewater containing cyanide ions. The equipment comprises a security filter, an ion exchanger loaded with cyanogen removal resin, a water injector and a sedimentation tank body. The process comprises the following steps of: after the wastewater is pre-filtered, adsorbing the cyanide ions by the cyanogen removal resin; after the cyanogen removal resin adsorbs the cyanide ions to be saturated, carrying out elution; sucking out hydrocyanic acid formed after elution under negative pressure formed at an outlet of the water injector; and mixing the sucked hydrocyanic acid and cuprous salt solution injected by the water injector to perform a reaction to form copper cyanide precipitates. The process has the principle that the cyanide ions in the wastewater are reduced by an enrichment method, and does not adopt a dispensing or electrolyzing mode just like the conventional method, and thus, the process does not need to consume any energy resources and is more environmental-friendly and the mineralization of water cannot be increased in the whole technological process.

The invention relates to a method for acquiring activated regenerated paracetamol pharmaceutical waste activated carbon through microwave heating and belongs to the technical field of resource recycling. The method for acquiring paracetamol pharmaceutical waste activated carbon through microwave heating comprises the following specific steps: paracetamol pharmaceutical waste activated carbon is placed in a microwave oven with power ranging from 0 to 40kW; the temperature rises to 500-700 DEG C at the heating rate of 145-175 DEG C/min and heat preservation is performed for 8-10 min; and the microwave heated paracetamol pharmaceutical waste activated carbon is dried for 24-48 h at the temperature ranging from 105 to 115 DEG C and then is cooled to acquire activated regenerated paracetamol pharmaceutical waste activated carbon. The method works without the use of protective gas, thereby simplifying the test process and operation, consuming less energy and producing no pollution. The activated regenerated activated carbon is characterized in that the absorption property is restored, the specific surface area reaches 1000 m<2>/g above, the total pore volume ranges from 0.95 ml/g to 1.10 ml/g, and the activating regeneration yield exceeds 90%.