59results about How to "No need to regenerate" patented technology

The invention discloses reformate hydrogenation catalyst and the production method thereof. The invention is characterized in that the catalyst consists of a main active component, auxiliary agent, and carriers, the structural formula is Pd-Ma (Mb)/carriers; the main active component is a double noble metal component Pd, and the content is 0.01 to 0.5 wt percent; Ma is one of Au, Ag, Pt, Rh, and Ir, and the content is 0.01 to 0.5 wt percent; Mb is one of Sn, Pb, Sb, and Bi, and the content is 0.2 to 1.0 wt percent; the rest are carriers; inorganic acid or organic acid is taken as competitive adsorption auxiliary agent to achieve that the active component presents the distribution of an eggshell-shaped shallow layer, the active metal and the auxiliary agent are loaded by a distribution impregnation method or a co-impregnation method, and then the hydrogenation catalyst is produced through drying and roasting.

The invention relates to a method for removing olefins from reformate through liquid phase circulation selective hydrogenation. The method is characterized in that performing hydrogen saturation in a pipeline to form a raw material/hydrogenation product/hydrogen liquid phase mixture, and adding the liquid phase mixture to a multistage conventional hydrogenation reactor in sections under the hydrogenation condition; and entering a catalyst bed area in sections for reaction, wherein part of reaction products discharged from the bottom of the reactor circulate and are mixed with fresh raw materials, and part of reaction products discharged from the reaction system enter a follow-up separating device, the ratio of the circulation volume and the raw materials in the circulating liquid hydrogenation products is 1: (1-5): 1 by volume, the hydrogenation process conditions include that the reaction temperature is 80-180 DEG C, the pressure is 1.5-2.0MPa, and the fresh feed volume space velocity is 2.0-4.0hr-1.

The invention discloses a continuous arsenic removal catalyst for industrial tail gas purification. The continuous arsenic removal catalyst is prepared by mixing a solution of an active component, raw powder of a molecular sieve and a binding dispersant and moulding by extruding, wherein the molecular sieve serves as a carrier, the active component is a cupric salt, the carrier is a molecular sieve of 13X-grade particles, the effective micropore size of the molecular sieve is 0.8-1.5nm, and the volume ratio of micropores is over 80%. The continuous arsenic removal catalyst is prepared as follows: weighing the raw powder of the molecular sieve, stirring, adding the solution of the active component, adding the binding dispersant after the material is wetted, mixing the materials uniformly, molding by extruding, drying and calcining. The continuous arsenic removal catalyst is used for removing hydrogen arsenide from tail gas of calcium carbide, tail gas of yellow phosphorus and other atmospheres. Hydrogen arsenide is subjected to hydration reaction after being subjected to catalytic oxidation, and then is discharged in the form of arsenic acid or arsenious acid. The active component of the continuous arsenic removal catalyst does not change obviously before and after catalytic oxidation, and the requirement that CO in tail gas serves as a product with high additional value can be met.

The invention relates to a fluorine-removing agent with high efficiency and its preparation method and application. The invention includes the raw material agitation, the formation and the roasting which contains laterite, the aluminum salt, of which the weight dosage of the aluminum salt is 0-30% according to the gross weight of the raw material, the fluorine-removing agent can widely used in the profession of the fluorine sewage treatment, the high fluorine surface water purification. The invention is simple craft, and operation.

The invention belongs to the technical field of waste gas desulfurization and purification, particularly provides a modified active carbon desulfurizer and a preparation method thereof, and a hydrogen sulfide waste gas treatment method using the desulfurizer. The modified active carbon desulfurizer is prepared from impregnating activated carbon with active agent mixed solution comprising phenol, acetone, sodium carbonate, ferric nitrate and organic solvent, and drying and roasting the mixture. The modified active carbon desulfurizer converts the hydrogen sulfide in the waste gas into sulfur dioxide at atmospheric temperature and pressure under the absorption and catalytic oxidation action, and the sulfur dioxide is converted into SO42- in water phase by washing and removed. The waste gas treatment method uses the modified active carbon desulfurizer, and prevents the defects that the desulfurizer needs to be regularly desorbed and regenerated due to blockage caused by adsorption saturation and generated elemental sulfur. Compared with an ordinary activated carbon desulfurization process, the process has the advantages of high hydrogen sulfide removal rate, long service life of the desulfurizer, low operation cost, simplicity in operation and management and the like.

The invention discloses a printing and dyeing wastewater treatment process which comprises the following steps: adding a filter aid into wastewater, flocculating the wastewater, filtering to remove suspended matters from the wastewater, and reserving small suspended matters with colors and dissolved matters; adding a reducing decolorizer into the wastewater subjected to primary filtration for treating dyeing wastewater of direct dyes, so that dye molecules in the wastewater form a reductive degradation product; enabling the wastewater containing the reductive degradation product to pass through an adsorption material for adsorbing the reductive degradation product or other materials in the wastewater to the solid surface due to the adsorption effect; pouring a non-water-soluble organic solvent into the wastewater subjected to adsorption, and vibrating the solvent and the wastewater together, wherein the water phase is colorless when two phases are separated, and the dyes are accumulated on the upper-layer organic phase; and pouring a certain quantity of clean water into the wastewater subjected to extraction for diluting the wastewater. The process has the advantages that the pH value of the wastewater does not need to be adjusted, the effect is good, and the cost is low.

The invention discloses an active carbon fiber-loaded NaBiO3-based composite oxide and a preparation method thereof and a method for degrading organic dye waste water by using the composite oxide. The preparation method comprises the following steps: successively cleaning an active carbon fiber with ammonia water, nitric acid, acetone and deionized water and drying the active carbon fiber for subsequent usage; synthesizing BSO from NaBiO3 and AgNO3 in a liquid phase and preparing a composite function material according to a mass ratio of BSO to NaBiO3 of 1: 1-3; and placing an epoxy resin and the composite function material according to a weight ratio of 1.5-2.5: 1 into a container containing acetone, carrying out high speed stirring, dipping the active carbon fiber 5 to 10 times of the mass of the composite oxide function material into an acetone solution for 2 h and successively subjecting the active carbon fiber to vacuum drying and then to heat treatment under the protection of N2 so as to obtain the composite oxide. The degradation method comprises the following steps: adding 2 to 5 g/L of the composite oxide into the organic dye waste water under irradiation by visible light; carrying out stirring at room temperature and normal pressure; and discharging waste water through centrifugation after basic decolouring of the waste water. The degradation method provided by the invention has the advantages of simple requirements on equipment, low energy consumption, convenient operation and capacity of achieving the purposes of decolouring, degradation and mineralization of the dye waste water in a short period of time.

The invention discloses a method which aims at the deep treatment of dyeing wastewater and has the advantages of simple operation, low cost and no secondary pollution. The method comprises the following steps: based on the biochemical-physical and chemical treatment of the dyeing wastewater, tail water obtained after treatment is lifted by a pump and enters a static adsorption bed for filling fine coal particles, the stay time is controlled to between 2 and 4 hours, difficultly degraded organic matters in the tail water are removed by adsorption, and the discharged water meets the discharge standards and is discharged or reutilized. The method has the advantages of unnecessary addition of other chemical agents, low operational cost and no secondary pollution; the stay time is short with no more than 4 hours, and the reactor occupies small areas; the pH value of the tail water does not need to be adjusted, and the tail water after treatment can be reutilized as reclaimed water; and saturated adsorbing materials are unnecessarily regenerated, and can be continuously used as fuel.

The invention relates to an air purification system, and concretely relates to an integrated compound fume purification system. The system comprises a box body, and a clean air chamber, a fume purification chamber and a waste oil collecting chamber which are individual spaces obtained through the separation of separators, wherein the upper portion of the outer wall of the box body is provided with an exhaust port and a power supply controller, and the bottom of the box body is provided with a washing liquid storage tank; the clean air chamber, the fume purification chamber and the waste oil collecting chamber are connected in sequence from top to bottom; an air heater and solenoid valves with different uses are arranged in the clean air chamber; a solenoid valve II, a water distributor, and a cyclone separation chamber, a filtering chamber and an electrostatic purification chamber which are mutually connected through a flange are arranged in the fume purification chamber; and an oil collecting hopper, an oil discharging valve, an oil collecting barrel, a fan and a water pump are arranged in the waste oil collection chamber. The system adopting a 'cyclone separation + adsorption filtration + electrostatic dust removal' integrated compound design mode overcomes the defects of traditional purification methods, and has the advantages of small occupied area, safety, high efficiency, stable operation, low noise and convenient maintenance and management.

The invention provides a processing method of explosive wastewater. The processing method comprises the following steps: (1) adjusting the pH value of explosive wastewater to 1-4 by acid, adding 0.05 to 0.5 M of persulfate, wherein persulfate accounts for 1 to 10 wt% of explosive wastewater, and evenly mixing; (2) placing an UV lamp in the explosive wastewater or on the surface of explosive wastewater, adding a copper-cerium modified titanium dioxide catalyst accounting for 5 to 30 wt% of explosive wastewater, carrying out aeration at the same time, and carrying out reactions for 2 to 12 hours; wherein the copper-cerium modified titanium dioxide catalyst is prepared by doping titanium dioxide by copper and cerium, and copper and cerium respectively account for 5 to 10 wt% and 10 to 20 wt% of titanium dioxide. The processing technology is simple, the cost is low, the maintenance is convenient, and the explosive wastewater can be recycled only through one step. Moreover, persulfate is taken as the oxidant, no secondary pollution or solid waste is generated; the service life of catalyst is long, and the catalyst can be continuously used and does not need regeneration.

The invention discloses a sodium bismuthate/epoxy resin/glass fiber composite material, a preparation method thereof and an application method for the composite material in degradation of organic waste water. The preparation method comprises the following steps: soaking sodium bismuthate powder in an aqueous solution of a silane coupling agent for treatment, then taking out the sodium bismuthate powder and drying the sodium bismuthate powder for subsequent usage; adding methyl tetrahydrophthalic anhydride into an epoxy resin and carrying out uniform mixing so as to obtain an epoxy resin glue solution; and mixing the treated sodium bismuthate with the epoxy resin glue solution, carrying out ultrasonic dispersion, coating an obtained mixture on glass fiber cloth, folding the glass fiber cloth three to five times in a die, carrying out curing, cooling and demolding and cutting the glass fiber cloth to a certain shape and a certain size. The application method comprises the following steps: uniformly putting the composite material with an appropriate shape and an appropriate size between jacket layers of a glass tube reactor and installing a visible light lamp at the center of an inner tube; allowing organic waste water to enter into a glass jacket, pass through the composite material and undergo a visible light catalytic degradation reaction with sodium bismuthate under irradiation by visible light. The preparation method has the advantages of low requirements on equipment, simple procedures, low energy consumption and convenience in operation; and the composite material is capable of degrading organic waste water in a short period of time.

The invention relates to a method used for treating highly concentrated ammonia-nitrogen in rare earth waste water, and belongs to the field of highly concentrated ammonia-nitrogen treatment. According to the method, a sticky solution is prepared from a prepared organic composite denitrfying agent modified magnesium aluminum iron hydrotalcite magnetic nano adsorption material and an adhesion agent at a mass ratio of 7:1; the surfaces of adsorption rods are coated with the sticky solution, and the adsorption rods are dried under ventilation states and are delivered into an adsorption tower; a rare earth waste water penetrating fluid is delivered through the adsorption tower so as to adsorb 8000 to 12000mg/L highly concentrated ammonia-nitrogen in the rare earth waste water, wherein aging of adsorption material surface layers can be realized via adsorption saturation; under action of applied magnetic field and current scour, layer-by-layer falling of the adsorption material surface layers is realized, and at last the ammonia-nitrogen content of the rare earth waste water is detected. The method is capable of realizing adsorption material renewal; regeneration is not needed; the ammonia-nitrogen concentration of discharged waste water is controlled to be lower than 0.7mg/L; ammonia-nitrogen removing rate is higher than 99.99%; and no secondary pollution is caused to the environment.

The invention relates to the field of preparation of fluorine removal agents, in particular to a method for preparing a fly ash fluorine removal agent through two steps of hydrothermal reaction/acid leaching and an application. According to the method for preparing the fly ash fluorine removal agent through two steps of hydrothermal reaction/acid leaching, fly ash and an alkaline solution are mixed and subjected to a hydrothermal reaction at the temperature of 35-200 DEG C for 0.5-6 h, washing and suction filtration are performed, and a filter cake is formed; the filter cake is soaked in an acid solution or subjected to magnetic stirring treatment for 5-10 min, and then, suction filtration is performed; the filter cake subjected to acid treatment is dried, and the fly ash fluorine removalagent is obtained. The fluorine removal agent is a novel adsorbent with great prospects, can be widely used in the industries of fluorine-containing wastewater treatment and high-fluorine surface water purification, can be put in a proper container for use and can be subjected to one-time batch-type treatment, that is, the fluorine removal agent is added to high-fluorine water and stirred to adsorb fluorine ions, and the purpose of fluorine removal is achieved. In a word, the fluorine removal agent has various application methods and can be selected and used according to actual conditions.

The invention discloses a method used for treating high concentration ammonia nitrogen in metallurgical waste water, and belongs to the field of metallurgical waste water treatment. According to the method, an organic composite denitrification agent modified magnesium aluminum iron hydrotalcite magnetic nano adsorptive material is prepared via magnetization, modification, drying, and activation, and then adsorption rods are prepared and are arranged in an adsorption tower to treat high concentration ammonia nitrogen in metallurgical waste water. In removing processes, high concentration ammonia nitrogen in waste water is absorbed, after saturation, aging of the surface layer of the adsorption material is realized, and updating of the adsorption material is realized under the action of an applied magnetic field and flow scour, and regeneration is not needed. After shedding, an obtained residue is waterless, and is small in volume; no ammonia gas is generated or released into the atmosphere; no precipitate is obtained; and no environmental secondary pollution is caused. Separation can be realized under the action of the applied magnetic field; ammonia nitrogen concentration is reduce to 0.45mg/L from 2000-6000mg/L; ammonia nitrogen removing ratio is higher than 99.99%; and the method can be used for treating waste water with high concentration ammonia nitrogen, and possesses a promising prospect.

The invention relates to a method for treating high-concentration ammonia nitrogen in garbage leachate, belonging to the field of wastewater treatment. The method comprises the following steps: mixing an organic composite denitrifier modified magnesium-aluminum-iron hydrotalcite magnetic nano adsorbing material and an adhesive in a mass ratio of 1:5 to obtain a viscous liquid, coating the viscous liquid to the surface layer of an adsorbing bar, drying, putting in an adsorption column, enabling the garbage leachate to flow through the adsorption column until the organic composite denitrifier modified magnesium-aluminum-iron hydrotalcite magnetic nano adsorbing material on the adsorbing bar surface adsorbs ammonia nitrogen to the saturated state, aging the surface layer of the magnesium-aluminum-iron hydrotalcite magnetic nano material by the organic composite denitrifier so that the aged adsorbing material surface layer sheds layer by layer under the action of garbage leachate flow scour and external magnetic field, and finally, determining the ammonia nitrogen content in the wastewater. The method can not generate ammonia gas to enter the air or generate any precipitate, can not cause secondary environmental pollution, does not need to regenerate the adsorbing material, and is simple to operate. The ammonia nitrogen removal concentration is lower than 1 mg/L, and the removal rate is up to 99.99% above.

The invention relates to a method for treating high-concentration ammonia nitrogen in urea and belongs to the field of wastewater treatment. The method comprises the following steps: preparing a viscous liquid by using a prepared organic compound denitrification agent modified magnesium-aluminum-iron hydrotalcite magnetic nano adsorption material and an adhesive in a mass ratio of 1:5, applying the viscous liquid to the surface of an adsorption rod, drying, putting the adsorption rod coated with the viscous liquid into an adsorption tower, enabling urea to flow through the adsorption tower until the organic compound denitrification agent modified magnesium-aluminum-iron hydrotalcite magnetic nano adsorption material on the surface of the adsorption rod adsorbs urea to be saturated, enabling aged surface layers of the organic compound denitrification agent modified magnesium-aluminum-iron hydrotalcite magnetic nano adsorption material one by one under the action of flashing of landfill leachate flow and an external magnetic field, and finally testing the content of ammonia nitrogen in wastewater. No ammonia gas can be generated to diffuse into the atmosphere, and no precipitate can be generated either, no secondary environment pollution can be caused, the adsorption material does not need to be regenerated, the ammonia nitrogen concentration is less than 1mg/L, and the removal rate is 99.99% or above.

The invention provides a dephosphorization catalytic reaction process and a catalyst for yellow phosphorus tail gas. The dephosphorization catalytic reaction process includes: injecting liquid water or water vapor into the yellow phosphorus tail gas according to a preset volume percentage to form a gas-water mixture, and feeding the gas-water mixture though the catalyst according to a preset space velocity after the gas-water mixture is preheated to transform into a gas state, wherein the total phosphorus is subjected to catalytic oxidation to produce phosphoric oxides, and the phosphoric oxides produce phosphoric acid after contacting water vapor, are desorbed at a reaction temperature of 150-200 DEG C and flow out in a gas state along with the reaction tail gas. The reaction process and the catalyst can achieve continuous dephosphorization at a low reaction temperature, thus reducing energy consumption.

The invention relates to the technical field of purification of free L-lysine and particularly relates to a method for extracting the free L-lysine from ammonia water eluate by a membrane method. According to the method, the free L-lysine is extracted by innovatively utilizing an electrodialysis plant, NH4Cl is effectively removed from the ammonia water eluate, and electrodialysis light water is subjected to depressurized concentration and vacuum baking, so as to obtain free L-lysine crystals; and a NH4Cl solution of electrodialysis concentrated water is subjected to electrodialysis concentrating of a section and then is evaporated, thereby obtaining an industrial grade NH4Cl product. According to the technology disclosed by the invention, the removal rate of Cl<-> reaches up to 99%, the recovery rate of the free L-lysine is higher than 95%, the traditional ion-exchange resin exchange method is replaced, the water consumption and water yield are reduced, the energy consumption is lowered, the operating cost is reduced; and the electrodialysis plant can be reused, and an ion exchange membrane has no need of regeneration and is relatively long in life.

The invention discloses a method for coating an ozone catalytic decomposition material on an electrostatic outdoor fresh air or indoor air purified dust collection pole plate, and belongs to the technical field of indoor air purification. According to the method, the surface of a pre-treated pole plate is coated with ozone catalytic decomposition material slurry, pole plate roasting treatment is carried out, and the pole plate loaded with the ozone catalytic decomposition material is obtained. The method is applied to the pole plate with the narrow electrode spacing of an electrostatic dust removal device, dust-contained air flow can make sufficient contact with the pole plate, the ozone making contact with the pole plate can be efficiently removed under the room condition, the ozone catalytic decomposition reaction condition is moderate, no secondary pollution exists, and no safety hidden dangers exist. The method is simple and easy to implement, the production cost is low, the methodis applied to coat the n ozone catalytic decomposition material on the surface of the pole plate, and under the condition that the environment temperature of the pole plate ranges from 5 DEG C to 40DEG C, and the relative humidity ranges from 10% to 90%, the ozone removal rate can reach above 90%.

The invention provides a pulsation gas flow and magnetic field combined enhanced methane catalytic reforming hydrogen production system and a pulsation gas flow and magnetic field combined enhanced methane catalytic reforming hydrogen production method, and relates to a fluidized bed methane catalytic reforming hydrogen production system and a fluidized bed methane catalytic reforming hydrogen production method. In the prior art, the utilization efficiency of the catalyst is low, the fluidization quality in the fluidized bed is low, the reaction rate is low, the catalytic reforming hydrogen production reaction-regeneration device is complicated, and other problems exist. A purpose of the present invention is to solve the problems in the prior art. According to the system, the lower portionof a fluidized bed reactor is provided with a conical wind distribution plate, an inner wind box is connected to the horizontal section of the conical wind distribution plate, an outer wind box is connected to the inclined section of the conical wind distribution plate, a heater is installed on the outer portion of the fluidized bed reactor, a stable magnetic field generator is installed on the outer portion of the heater, and the outlets of two independent gas flow generating devices are respectively connected to the inner wind box and the outer wind box. According to the method, the reduction of catalyst particles is firstly performed, than a catalytic reforming hydrogen production reaction is performed, and finally a coke deposition removing reaction is performed on the catalyst. The system and the method of the present invention are used for methane catalytic reforming hydrogen production.

The invention relates to a method for treating high-concentration ammonia nitrogen in leather wastewater, belonging to the field of wastewater treatment. The method comprises the following steps: mixing an organic composite denitrifier modified magnesium-aluminum-iron hydrotalcite magnetic nano adsorbing material and an adhesive in a mass ratio of 1:5 to obtain a viscous liquid, coating the viscous liquid to the surface layer of an adsorbing bar, drying, putting in an adsorption column, enabling the leather wastewater to flow through the adsorption column until the organic composite denitrifier modified magnesium-aluminum-iron hydrotalcite magnetic nano adsorbing material on the adsorbing bar surface adsorbs ammonia nitrogen to the saturated state, aging the surface layer of the magnesium-aluminum-iron hydrotalcite magnetic nano material by the organic composite denitrifier so that the aged adsorbing material surface layer sheds layer by layer under the actions of leather wastewater flow scour and external magnetic field, and finally, determining the ammonia nitrogen content in the wastewater. The method can not generate harmful gas or cause secondary environment pollution, and does not need to regenerate the adsorbing material. The ammonia nitrogen concentration in the treated wastewater is lower than 0.6 mg/L, and the removal rate is up to 99.99% above.