148results about How to "Thoroughly oxidized" patented technology

The invention discloses a preparation method of a composite heat conduction graphene membrane and the composite heat conduction graphene film. The preparation method comprises the following steps: S1, putting crystalline flake graphite or graphite powder into a mixed solution of concentrated sulfuric acid, potassium persulfate and phosphorus pentoxide, soaking for a day and a night, then carrying out suction filtration, drying, and carrying out pre-oxidizing; S2, oxidizing pre-oxidized graphite further by adopting a Hummers method, that is, oxidizing fully in concentrated sulfuric acid and potassium permanganate, then adding deionized water for diluting, and carrying out repeated washing and suction filtration, so as to obtain an oxidized graphene aqueous solution; S3, spraying the oxidized graphene aqueous solution on a substrate by adopting a thermal spray method, and depositing, so as to obtain an oxidized graphene film; S4, reducing the oxidized graphene film, so as to obtain the graphene film; and S5, laminating the graphene film, so as to obtain the composite heat conduction graphene film. Compared with the prior art, the preparation method is simple, the cost is low, and the prepared composite heat conduction graphene film has a favorable heat conduction performance.

The invention relates to a method for preparing spherical aluminum-doped nickel lithium carbonate for a lithium ion battery positive electrode material by combining liquid phase oxidation and crystallization controlling. Through controlling of the preparation technique, firstly synthesizing a spherical hydroxyl oxygenized nickel cobalt aluminum precursor with high density, and then calcining at the temperature of 500-800 DEG C for 10-24 hours in a flow oxygen gas atmosphere after mixing the precursor with a lithium source, thus acquire the spherical aluminum-doped nickel lithium carbonate with high density. The synthesized aluminum-doped nickel lithium carbonate is in a single spherical shape, has good stacking density, and can be used for improving the volume ratio capacity of a battery.The aluminum-doped nickel lithium carbonate prepared by the method in the invention has the advantages of high specific capacity and good loop stability. The method provided by the invention has the advantages of simple technique, low cost, less pollution, good product performance and suitability for industrialized production.

The invention discloses a method for recycling rare earth from NdFeB waste. The method is mainly characterized in that by utilization of oxidability and faint acid performance of hydrogen peroxide, a certain proportion of mixed acid is used for dissolving the NdFeB waste, the NdFeB waste is crushed through an NdFeB hydrogen crushing device, and after acid leaching is finished, N503 is used for extracting the iron element in a leaching agent; and then P507 is used for extracting the single rare earth metal ions, corresponding rare earth metal ions are deposited through oxalic acid and potassium carbonate, and the rare earth metal is further purified. Through scientific purifying design, the defects that in traditional rare earth recycling, energy consumption is high, and acid leaching of oxidation NdFeB is not thorough are overcome; and in the pretreatment process, grinding is not needed, a large amount of dust is prevented from being generated, energy saving and environment friendliness are achieved, and the NdFeB more thoroughly forms the rare earth metal ion through a mixed acid acid leaching method.

The invention discloses a double-groove wet-process flue gas desulfuration device and a double-groove wet-process flue gas desulfuration method operating on the basis of two pH values, which relate to a flue gas desulfuration device and a flue gas desulfuration method. The aim of the invention is to remove SO2 from the flue gas under a high pH value condition by using desulfurating spray slurry and to dissolve limestone and oxidize calcium sulfite under a low pH value condition so as to improve desulfuration efficiency and quality of gypsum and reduce limestone consumption, investment and operation cost. In the invention, a circulating oxidization tank at the bottom of an absorption tower is divided into two parts, an oxidation pond receives desulfurizating slurry flowing out from a desulfurization tower, the oxidation pond operates in a pH range from 4.0 to 5.5, and in the oxidation pond, sulfite ions are oxidized, and byproduct of desulfuration is led out from the oxidation pond; and fresh limestone slurry is added into a circulating pond, the circulating pond operates in a pH range from 6 to 6.5, and slurry is led from the circulating pound into the absorption tower to be sprayed for deselfuration. The device and the method contribute to improving quality of gypsum, desulfuration efficiency, reducing limestone consumption and lowering investment and operation cost, and are suitable for flue gas desulfuration when sulfur coal is burnt or different kinds of fire coal are burnt.

The invention relates to the technical field of waste gas purification, particularly a garbage transfer station malodorous gas treatment technique and device. The garbage transfer station malodorous gas treatment technique comprises a working mode and a disinfection mode, wherein the working mode adopts a low-temperature plasma cracking oxidation reactor and catalytic oxidation bed purification process; and the disinfection mode is implemented by the following steps: introducing air into the low-temperature plasma cracking oxidation reactor to generate ozone, hydroxy free radical and other active groups, and delivering to garbage, garbage leachate and other parts in need of disinfection treatment to perform disinfection. The garbage transfer station malodorous gas treatment device comprises a collecting system, a low-temperature plasma cracking oxidation reactor, a catalytic oxidation bed and a draught fan. The technique and device have high purification efficiency and favorable effect for malodorous peculiar smell, is slightly influenced by various environments and extrinsic conditions, and can effectively disinfect the parts in need of disinfection without influencing the biochemical properties of the garbage.

The invention discloses a method and a device for detecting chemical oxygen demand of a water body. The method comprises the following steps: applying 2.5V constant potential relative to a reference electrode to a boron-doped diamond film detection electrode as a working electrode by controlling an electrochemistry workstation; injecting certain volume of a sample to be detected into a backgroundsolution under a magnetic stirring condition; recording a current signal response of the working electrode acquired by the electrochemistry workstation in real-time; and calculating the chemical oxygen demand of the detected water body through current signals. The electrochemical detection method by the boron-doped diamond film detection electrode has the detection result in excellent comparable property compared with a national standard method, has high detection accuracy, wide the range without secondary pollution, and short electrode response time, ,and can meet the timely, quick and onlinerequirement in detecting the current environment. Compared with Pbo2 / Ti adopted in the current commercialized instrument, the detection signals have nearly one order of magnitude of predominance under the respective optimal use condition.

Disclosed is a clean production process for spinning by using advanced oxidation method to decompose polyvinyl alcohol pulp of fabric, which integrates high grade oxidation reaction device with desizing trough, the desized waste water flows through the oxidization reactor, thus degrading the polyvinyl alcohols contained in the waste water into intermediate product, the treated waste water flows back into the desizing trough for recirculation or direct discharge. The high grade oxidation technique includes optical catalytic oxidation or non-homogeneous phase Fenton catalytic oxidation, wherein the optical catalytic oxidation includes UV+TiO2+H2O2, UV+H2O2 or UV+TiO2, the non-homogeneous phase catalytic oxidation includes Nafion film + H2O2.

The invention belongs to the field of material synthesis, in particular relates to a method for non-invasive efficient purification of a single-wall carbon nano tube. The method comprises the following steps: laying original single-wall carbon nano tube samples in a quartz boat, and placing the quartz boat in a quartz tube; raising the temperature of a furnace to 400-500 DEG C at the speed rate of 10 DEG C. min<-1> and insulating for 1-3 hours; after an air oxidation reaction is finished, closing two ends of the quartz tube and introducing protective gas argon so as to exhaust the air in the quartz tube; then raising the temperature of the furnace to 750-1000 DEG C at the speed rate of 10 DEG C. min<-1> and insulating for 1-3 hours; after a high-temperature reduction reaction thermal treatment process is finished, introducing the protective gas, taking out the samples after the temperature of the furnace is reduced to room temperature, and removing catalyst particles and unreacted metal oxides, wherein the metals on the catalyst particles are reduced out; and filtering, washing and drying again, so as to obtain the purified single-wall carbon nano tube samples. In the method, the purification process is simple, the tube wall structure of the single-wall carbon nano tube is not destroyed in the whole purification process, the purification cost is low, environment is not polluted, and continuous operation can be realized, thus the method is suitable for large-scale purification of the single-wall carbon nano tube.

The invention discloses application of enterobacter aerogenes in the aspect of microbe generation and power generating method. The enterobacter aerogenes can be applied to the aspect of microbe power generation as anode catalyst of microbe fuel battery. The power generating method provided by this invention at the same time includes following steps: constructing microbe fuel battery; preparing enterobacter aerogenes inoculum; preparing anode liquid containing fuel; adding the enterobacter aerogenes inoculum and prepared anode liquid into the anode chamber of the microbe fuel battery; performing power generation detection after static cultivation. The enterobacter aerogenes used in the invention belongs to the facultative anaerobe that is easy to be cultured and will not be deactivated under the existing condition of oxygen. The power generation activity can be maintained with low running cost for a long time by periodically adding culture medium. Meanwhile, the invention has wide fuel utilization range, complete biological oxidation and high electronic coefficient of recovery.

The invention relates to a method for treating garbage leachate. The invention adopts the technical proposal that the method comprises the following steps: adjusting the pH value of the garbage leachate to between 7 and 9, adding 0.01 to 0.03 mol / L of Fe2SO4.7H2O, 9 to 11 g / L of active carbon and 6 to 8 ml / L H2O2 into a reaction system, and making the mixture react for 5 to 7 minutes at the microwave frequency of 2,450Hz and the microwave power of 300W; delivering the mixture into a reaction tank within 0.4 to 0.6 hour; aerating the mixture for 7 to 9 hours at the aeration rate of 13.5 L / h, and controlling the pH to between 6.5 and 7.5 and the sludge concentration to between 3,000 and 4,000 mg / L; standing the mixture for 2 to 3 hours, and layering the mixture; discharging the liquid at the upper layer within 0.4 to 0.6 hour; and after the reaction tank stood for 0.4 to 0.6 hour, and carrying out SBR post treatment of the garbage leachate of the next period. The method has short pretreatment time, improves the biodegradability obviously, has good pollutant removal effect, and improves the yielding water quality remarkably.

The invention discloses a regeneration method of a deactivated catalyst. The catalyst comprises a TON type molecular sieve and VIII noble metal components. A regeneration process comprises the steps of firstly, treating the deactivated catalyst with an organic solvent, and then loading zinc on the treated catalyst, wherein the atom ratio of the zinc to platinum is (10 to 1) to (1 to 1); under the action of oxygen-containing gas, performing programmed-controlled carbon burning, wherein the highest temperature of the carbon burning process is 450 DEG C or below, and performing reduction treatment on the treated catalyst in hydrogen atmosphere; and soaking the catalyst after the reduction treatment with a dilute acid solution containing chitosan in vacuum environment or inert atmosphere, and finally, performing drying and roasting so as to obtain the catalyst of which the activity is restored. The method disclosed by the invention not only can effectively remove carbon deposits at low temperature, guarantees the pore structure of the catalyst to be free from damage, but also can enable noble metal to be well dispersed, and performance of the regenerated catalyst can be well restored.

The invention belongs to the technical field of bioenergy, and relates to a microbial fuel cell adopting pseudomonas alcaliphila sp. MBR as a catalyst, and a preparation method thereof. The microbial fuel cell adopts pseudomonas alcaliphila sp. MBR as an anode catalyst, wherein the preservation number of the pseudomonas alcaliphila sp. MBR is CGMCC NO.2318, and anode solution contains glucose, sodium citrate, cane sugar, fructose, xylose or soluble starch. The microbial fuel cell can work under aerobic, anoxic or amaerobic conditions and has the characteristics of non-harsh power production conditions, simple operation and low operation cost.

The invention relates to a graphene-porous nickel oxide composite catalyst for advanced treatment of waste water, a preparation method and application. The graphene-porous nickel oxide composite catalyst comprises a graphene carrier and porous nickel oxide loaded on the graphene carrier, and the mass ratio of the graphene carrier to the porous nickel oxide is 19: 1-1: 19, and is 10: 1-1: 10 preferably. By the graphene-porous nickel oxide composite catalyst, organic pollutants can be decomposed thoroughly.

The invention discloses a method for separating molybdenum and rhenium from rhenium and molybdenum-containing concentrate. The method comprises the following steps: adding an adhesive, an oxidant and water in rhenium and molybdenum-containing concentrate to prepare rhenium and molybdenum-containing concentrate pellets with grain size of 3-6mm and moisture of 8-12%, and distributing the concentrate pellets on a chain grate bed of a chain grate machine to carry out drying, oxidizing roasting and cooling, so that molybdenite in the pellets is oxidized into MoO3, and the rhenite is oxidized into Re2O7, which are volatilized to enter smoke and then are recovered by drip washing with water; in above process, the method of oxidizing roasting at two sections is adopted, the oxidizing efficiency of the molybdenite and the rhenite in the concentrate pellets are improved through different air roasting temperatures and air speeds, the Re2O7 concentration in the smoke is improved by circulating roasting smoke in a roasting chamber II to a roasting chamber I, and the smoke is maintained at 300-400 DEG C to effectively inhibit Re2O7 from being reduced by the SO2 so as to increase the recovery rate of the Re2O7; by adopting the roasting method disclosed by the invention, the volatilization rate of rhenium in the roasting process can be not less than 80%, the content of soluble molybdenum in roasted molybdenum is not less than 90%, the molybdenum and the rhenium are efficiently oxidized and separated.

The invention relates to the field of wastewater treatment, in particular to a process and device for circulating multi-dimensional catalyzing advanced oxidation treatment of oily wastewater, and particularly discloses a process for treating the oily wastewater. The process comprises the following steps that the oily wastewater is treated through ultrasonic waves and an oxidizing agent, and most of degradation-resistant micromolecules and easily- degradable long-chain and endless chain macromolecule matter in the wastewater are removed; treatment time ranges from 5 min to 10 min; the treated oily wastewater is treated through ultraviolet light and ozone, and part of easily degradable organic matter and a small part of degradation-resistant micromolecules in the oily wastewater are removed; treatment time ranges from 6 min to 8 min; the treated oily wastewater is treated through ultraviolet light, ozone and a catalyst, and a large amount of organic matter is degraded; treatment time ranges from 9 min to 12 min. The device for circulating treatment of the oily wastewater is further provided. Three advanced oxidation processes are combined, the micromolecule matter influencing hydroxyl radical in the oily wastewater is oxidized and removed, a large amount of hydroxyl radical is generated, and high-concentration organic matter can be thoroughly oxidized.

The invention discloses a simultaneous desulfurization and denitrification device for a boiler exhaust gas. The device comprises one or more serial desulfurization and denitrification towers and an external hydrogen peroxide storage tank, wherein a spraying pipe, an ultraviolet lamp and a desulfurization and denitrification module composed of regular nanometer photocatalyst plates and sieve plates are successively arranged in the tower from top to bottom; the spraying pipe is connected with the hydrogen peroxide storage tank through a hydrogen peroxide circulating pump; an exhaust gas inlet is formed in a side wall at the bottom of the tower; a liquid sealing tank is vertically arranged at the bottom of the tower; the boiler exhaust gas enters the tower through the exhaust gas inlet; under the effects of the desulfurization and denitrification module and the hydrogen peroxide, SO3 and NO2 are respectively oxidized and absorbed as sulfuric acid and nitric acid and then are removed; the liquid after the photocatalysis hydrogen peroxide oxidizing reaction passes by the sieve plates and then enters the liquid sealing tank and finally converges in the storage tank; the treated clean exhaust gas is discharged from an exhaust gas outlet at the top end of the tower. The simultaneous desulfurization and denitrification device for the boiler exhaust gas can oxidize all the SO2 and NO in a coal-fired boiler into SO3 and NO2 and the desulfurization rate and the denitration rate are respectively above 99% and 90%.

The invention discloses a microbial capsule for tailing remediation and a three-in-one tailing in-situ remediation method. In the prior art, the operation and maintenance cost of acid wastewater treatment is high, the duration time is long, and the treatment effect is unstable. The invention provides a microbial capsule for tailing restoration. The microbial capsule comprises a porous calcium carbonate ball and a microbial agent loaded on the porous calcium carbonate ball. The microbial capsule can effectively inhibit the oxidation of sulfide minerals, and the microbial inoculum is not easy to lose. According to the separation layer, modified environmental minerals and metal ions are combined together, and a modified environmental mineral-metal combination is used as a separation substance, so that acidic wastewater formed after sulfide in an upper-layer tailing pond is oxidized can be prevented from permeating to a lower layer; and air on the upper layer is prevented from entering the bottom layer to oxidize sulfide minerals. On the basis, the isolation layer not only achieves the effect of adsorbing and isolating the pyrite, but also can oxidize sulfide minerals on the mineral surface layer through metal ions.

The invention discloses a smelting technology of ultralow boron steel, and belongs to the technical field of steel smelting. The smelting technology specifically comprises the stages of KR molten ironpretreatment, converter smelting, LF refining, pouring, cast blank stack cooling and cleaning, heating and rolling and steel plate stack cooling. According to the smelting technology, the boron content in molten steel can be controlled to be 0.0005% or below, the smelting requirements of the ultralow boron steel can be completely met, according to a prepared steel plate, the yield strength is higher than or equal to 462 MPa, the tensile strength is higher than or equal to 560 MPa, the ductility is higher than or equal to 25%, the impact strength at the temperature of minus 40 DEG C can reach186 J or above, and the overall performance is excellent.

A modified activated carbon adsorption desulfurization agent is prepared from the following raw materials: by weight, 100-120 parts of coconut shell activated carbon, 1-2 parts of ammonium persulfate, 1-2 parts of copper oxide, 1-2 parts of lanthanum oxide, 1-2 parts of chromium oxide, 12-14 parts of corn cob, 1-2 parts of agar, 4-5 parts of glycerin, 8-10 parts of modified attapulgite and a proper amount of water. The modified activated carbon adsorption desulfurization agent containing lanthanum, chromium, copper and multiple metal oxides can more thoroughly and rapidly oxidize sulfides; the modified activated carbon adsorption desulfurization agent processed by spray drying has higher activity and stronger adsorption ability; and due to the addition of the corn cob, the modified activated carbon adsorption desulfurization agent has more spaces and can absorb more sulfides.

The invention relates to the field of new materials. A preparation method of expanded graphite comprises the steps of preparing a first mixed solution which comprises potassium permanganate, perchloric acid and phosphoric acid; adding the first mixed solution to crystalline flake graphite and carrying out stirring reaction at 20-45 DEG C for 15-35min to obtain a first mixed system; preparing a second mixed solution which comprises sodium chlorate, perchloric acid and nitric acid; adding the second mixed solution to the first mixed system and carrying out stirring reaction at 20-45 DEG C for 5-15min to obtain a second mixed system; filtering the second mixed system, taking a solid, and washing the solid until washing liquid is neutral to obtain a head product; and burning the expanded graphite in an environment of 850-1,000 DEG C until the volume does not change any more to obtain the expanded graphite. According to the preparation method of the expanded graphite, graphite oxidation is more thorough and higher in intercalating efficiency; the expansion rate of the prepared expanded graphite can reach 500-700ml / g; and the step is simple, the continuous reaction can be achieved, the production cycle is short and the method is suitable for industrial production.

The invention discloses clostridium beijerinckii with high electricity yield. The number of the strain is M13. Clostridium beijerinckii is collected in the China Center for Type Culture Collection (CCTCC) on September 14, 2013, with collection number of CCTCC NO:M2013424. The invention also discloses an application of clostridium beijerinckii with high electricity yield to electricity generation. When 0.15g / L of methyl viologen serves as an electronic mediator, the maximum output voltage of clostridium beijerinckii in 1g / L of glucose seed solution is as high as 230mV, and the maximum output power density is 79.2mW / m<2>. Clostridium beijerinckii has the advantages that a process is simple, is convenient to operate, is pollution-free and is low in cost; utilization of fuel of clostridium beijerinckii is popularized more widely; the electron recovery rate is relatively high; the energy crisis is relieved; clostridium beijerinckii is an excellent strain suitable for microbial fuel cell study and application.

The invention discloses a porous ceramic catalytic oxidizer, a preparation method thereof and a multipurpose efficient air purification device and belongs to the technical field of environments. A columnar ceramic pillar in the porous ceramic catalytic oxidizer takes diatomite as a main material, Fe-Cr-Al alloy wires are taken as support and internal heating wires, cotton and silk are taken as printing templates, a blank is prepared with a compression molding method, the Fe-Cr-Al alloy wires for support are powered on to assist in heating, and calcination in a high-temperature furnace is performed, and the porous ceramic catalytic oxidizer is prepared. The multipurpose efficient air purification device comprises the porous ceramic catalytic oxidizer, a catalytic oxidation electrode, a capturing catalytic oxidation net, a fan and a supply and regeneration device, the porous ceramic pillar of a special structure is supplied with an oxidizer by means of a concentric tube oxidizer supply technology and device, and cooperative treatment of chemical catalytic oxidation and electrocatalytic oxidation of harmful gas is realized in combination with the catalytic oxidation electrode and thecapturing catalytic oxidation net arranged behind the columnar ceramic pillar. The multipurpose efficient air purification device can realize efficient oxidation purification of multiple substances inair and waste gas and has higher economic and environmental benefits.

The present invention discloses a liquid-state hydrocarbon waste alkali liquid treatment method, which comprises: removing oil substances from a waste alkali liquid, carrying out a high temperature wet oxidation treatment, adjusting the alkali concentration of the waste alkali liquid, recovering sodium carbonate, carrying out evaporation concentration so as to further improve the alkali concentration in the solution and recover the remaining sodium salt, and reusing the treated waste alkali liquid. With the method of the present invention, the COD and the sulfides in the waste alkali liquid can be efficiently removed, the concentration difference of the sodium carbonate and the sodium sulfate in the solution being subjected to the high temperature wet oxidation treatment is utilized to recover the sodium salt in two times, the sodium hydroxide solution obtained after treating the waste alkali liquid is recycled, and the zero emission of the liquid-state hydrocarbon waste alkali liquid is achieved.

The invention discloses a farmland recession treatment system and method based on ecological interception and circulating purification. The system comprises a caisson, an ecological ditch, a multi-stage ecological regulation and storage pond, an automatic water quality detection system and an intelligent water-saving irrigation system, the promoting caisson is arranged at a water outlet of the farmland, and farmland recession water discharged from the water outlet can completely enter the promoting caisson for preliminary sedimentation; the multi-stage ecological regulation and storage pond comprises a divergent section and a main reaction section which are communicated with each other; the main reaction section comprises an aeration tank, a sedimentation tank with ecological protection slopes on peripheral slopes, a first filter material dam, a second filter material dam and a purification tank; a plurality of bionic aquatic plants hung in the direction perpendicular to the water flow direction are uniformly fixed in the purification tank; and an automatic water quality detection system for detecting the standard reaching condition of water quality is arranged at the water outlet end of the purification tank. The method is suitable for intercepting farmland non-point source pollutants in planting areas of aquatic plants such as rice fields and zizania aquatica, and the river entering amount of the farmland non-point source pollutants can be effectively reduced.

The invention discloses a method for electrolysis-catalytic oxidation joint treatment on salt-containing organic wastewater, which can effectively utilize salt content in the organic wastewater, treat wastes with wastes and has the characteristics of stable effect, low cost, easy industrial application and the like while meeting the treatment requirements. The method for electrolysis-catalytic oxidation joint treatment on salt-containing organic wastewater comprises the following main steps: adding high-salt organic wastewater into an electrolytic bath to electrolyze for 20-140min; introducing the electrolyzed wastewater into a fixed bed reactor filled with catalysts; and continuously flowing the wastewater through a bed layer at the airspeed of 1.6-2.4h<-1> for a catalytic oxidation reaction.

The invention provides a method and a device for detecting the COD (chemical oxygen demand) of a water body through the synergy of ozone and ultraviolet. The method and the device have the advantages that the COD of the water body is detected by utilizing an ozone-ultraviolet-synergic advanced oxidation technique based on an oxygen consumption difference value theory, so that various organic matters in the water body can be rapidly and thoroughly oxidized and digested within a short time, and the oxidation efficiency is high; the whole measurement process can be automatically controlled by utilizing an automatic technique, and the method and the device are particularly suitable for the online detection of the chemical oxygen demand in environmental water quality online monitoring systems; no chemical reagent is added in the whole oxidative digestion process, so that the secondary pollution is avoided; the measurement method is simple, is easy to understand, is insensitive to the influence of chloride and is accurate and reliable in result; the measurement on chemical oxygen demand can be continuously carried out by only consuming the water energy and the electric energy, so that the cost is low.

The invention relates to an electric chemical device and method for generating hydrogen peroxide from a cathode and treating organic wastewater with an anode. The electric chemical device comprises aclosed electrolytic cell, a power supply, a gas diffusion cathode, an anode, a circulation cooling device and an oxygen steel cylinder, wherein the gas diffusion cathode and the anode are connected with the power supply; an ionic exchange membrane which extends in a vertical direction is arranged inside the electrolytic cell and partitions the electrolytic cell into an anode chamber and a cathodearea; the anode is positioned in the anode chamber; the gas diffusion cathode is positioned in the cathode area and partitions the cathode area into a cathode chamber and a gas chamber; the cathode chamber is closed to the ionic exchange membrane; openings are formed in the tops of the anode chamber and the cathode chamber; the circulation cooling device comprises a condenser and a circulation pump which are sequentially connected through pipelines; both ends of the pipeline of the circulation cooling device each communicate with the cathode chamber; and the oxygen steel cylinder communicateswith the gas chamber through a pipeline. The device is small in size, easy to operate and high in security, and due to simultaneous operation of the cathode and the anode, the practicability of the device is improved, and the ideas of green and environment protection can be met.

The invention discloses a method for rapidly cleaning stubborn dirt in oil wells and oil reservoirs close to oil wells. The method includes injecting penetrating fluid, spacer fluid and cleaning fluid to the stratum sequentially, closing the well to react for 3-5 hours, and cleaning blockages of oil reservoirs. The penetrating fluid is composed of glycol ethers and various surface active agents and is capable of penetrating, loosing and stripping organic blockages rapidly; the spacer fluid is composed of acidic medium containing complexing agent and is capable of dissolving inorganic dirt of iron dirt, calcium dirt, mineral dirt and the like; and the cleaning fluid is composed of sulfate, hydrosulfite and oxalate, is capable of acting with the acidic spacer fluid to oxidize and decompose of organic blockages completely, and recovering and increasing oil reservoir penetrating rate. Production increase effect is good after the blockages are cleaned.

The invention discloses a regeneration method for a catalyst containing a precious metal and a molecular sieve. The catalyst comprises a TON type molecular sieve and a group-VIII precious metal component. The regeneration method comprises the following steps: treating the deactivated catalyst with an organic solvent at first; then loading zinc on the treated catalyst, wherein the atomic ratio of zinc to platinum is 10:1 to 1:1; carrying out programmed charking under the action of oxygen-containing gas, wherein the highest temperature in the process of charking is lower than 450 DEG C; carrying out washing with nitric acid; and then carrying out drying so as to obtain a regenerated catalyst. The regeneration method provided by the invention has the following advantages: carbon deposit can be effectively removed at a low temperature, the pore structure of the catalyst can be protected from destroy, accumulation of the precious metal is avoided, and the precious metal is well dispersed, so the reactive performance of the regenerated catalyst can be restored to the reactive performance level of a fresh catalyst. The method is particularly applicable to regeneration of deactivated hydroisomerization dewaxing catalysts.

The invention provides a preparation method of a silicon oxide layer. The preparation method comprises the following steps: putting a silicon chip in mixed acid liquid for oxidation treatment, wherein the mixed acid liquid is nitric acid-sulfuric acid mixed liquid which is prepared by mixing 68% concentrated nitric acid and 98% concentrated sulfuric acid in a volume ratio of (1:1)-(10:1). The preparation method of the silicon oxide layer has the following advantages: 1) a more efficient oxidation effect can be realized on the silicon surface, the silicon of the silicon oxide layer is oxidized more thoroughly, and the proportion of high-valence silicon is raised; 2) the preparation temperature is low, a silicon oxide layer with thickness of greater than 1.4nm can be prepared at a temperature of as low as 20 DEG C, and the need for preparing a solar cell is met; 3) the treatment time is short, for example, the silicon oxide layer with thickness of greater than 1.4nm can be prepared within 2-4min; and 4) the thickness of the oxide layer is appropriate, the prepared silicon oxide layer can be controlled at 1.0-3.0nm, and the thickness of the silicon oxide layer can completely meet the thickness requirements of devices.