54results about How to "Effective desorption" patented technology

The invention discloses an ultrasonic excitation and hydraulic slotting integrated device, a compound intensified gas extraction system and method. The ultrasonic excitation and hydraulic slotting integrated device comprises a sleeve, a hydraulic slotting drill bit is fixed to the top of the sleeve, and a plurality of hydraulic slotting drill bit jet holes are formed in the circumferential direction of the hydraulic slotting drill bit; and the bottom of the sleeve is connected to a high pressure pump through a high-pressure hose, an ultrasonic transducer is arranged on the lower portion of thehydraulic slotting drill bit, the sleeve is sleeved with the ultrasonic transducer, and the ultrasonic transducer is connected to an ultrasonic generator through a cable. According to the ultrasonicexcitation and hydraulic slotting integrated device, advantage complementation of two single technologies is achieved through organic combination of ultrasonic excitation and hydraulic slotting, coalseam gas desorption is effectively promoted, the coal seam permeability is increased, the technical problem of mine gas extraction is solved, and the ultrasonic excitation and hydraulic slotting integrated device is applicable to various complicated geologic conditions, and has the wide application range.

The invention provides a preparation method of a high-performance nickel-based ruthenium-containing compound oxide hydrogen evolution electrode, and belongs to the field of electric catalytic hydrogen evolution in chlorine alkali industry. The method comprises the following steps: firstly, putting a foam nickel substrate into an acetone solution and carrying out ultrasonic concussion for 15 minutes so as to perform chemical degreasing; then, soaking the foam nickel substrate in a 3mol / L hydrochloric acid aqueous solution for 0.5 hour so as to remove oxides from the surface of the foam nickel substrate; finally, carrying out in-situ growth of nickel ruthenium oxide nanorods on the surface of the pretreated foam nickel substrate by virtue of a solvent thermal synthesis method, thereby obtaining the hydrogen evolution electrode with good catalytic performance and high stability. The method is simple and novel and is convenient and feasible to operate. The prepared nickel-based ruthenium-containing compound oxide hydrogen evolution electrode has a unique nanorod structure; the coating surface of the electrode is flat and flawless without a fracturing phenomenon. Thus, the electrode provided by the invention can be widely taken as a hydrogen evolution electrode material for alkaline electrolysis water.

The invention discloses a polishing liquid for silica dioxide medium, which comprises the following parts: 10-50% abradant, 0.01-0.6% soxidant, 1-6% pH adjusting agent, 0.01%-15% chelant and 28.4-88.98% deionized water, wherein pH value range of polishing liquid is 11-12, and the grain diameter is 15nm-100nm. The preparing method comprises the following steps: taking the material; filtering; purifying; mixing homogeneously. The invention doesn't corrode and pollute the device, which has the simple technology and the low cost.

The invention discloses a method for repairing polluted soil through low-temperature thermal desorption with chemical drip washing. The method comprises the following steps: firstly, performing low-temperature thermal desorption treatment on mercury polluted soil so as to remove metal mercury, organic combined mercury and a part of inorganic combined mercury with a low melting point in the soil; secondly, performing drip washing with a mixed liquid containing organic acids, iodate and chlorine salts so as to remove mercuric oxide with a high melting point; and finally performing drip washing on mercuric sulfide with a high melting point with a mixed liquid of sodium sulfide and sodium hydroxide. By adopting the method, efficient removal of mercury of multiple valence states in mercury polluted soil can be achieved, a small amount of mercury is retained, the removal rate of mercury is up to 95% or greater, secondary pollution to the environment is avoided, and the cost is low.

The invention provides a heat repairing method for organic contaminated soil. Smoke of a combustion furnace is used for heating the organic contaminated soil in an in-situ or different-position manner, and heavy metal type pollution, pesticide type pollution, hydrocarbon pollution and biology and nutrient type pollution are separated from the soil. According to the method, the strong heat decomposition and stabilizing functions are achieved for the pollutants which belong to the heavy metal type such as chromium, cadmium, mercury, arsenic, lead, copper, zinc and nickel; the organic pollutants which belong to the pesticide type such as insecticide, acaricide, bactericide, herbicide, nematicide and a plant growth regulator can be effectively desorbed at the high temperature; the extremely high pyrolysis effect is achieved for hydrocarbon pollutants including petroleum hydrocarbon, halohydrocarbon, polycyclic aromatic hydrocarbon and the like; and the biology and nutrient type pollutants can be completely decomposed at the high temperature.

The invention discloses a method for preparing manganese-doped basic cobalt carbonate. The method comprises the following steps: adding a sodium carbonate solution and a cobalt chloride solution intoa reaction kettle, controlling the pH value of the reaction system within 6.0-7.8, controlling the reaction temperature to 90-95 DEG C, and performing stirring to react for 5-6 hours so as to obtain basic cobalt carbonate slurry; and dehydrating the basic cobalt carbonate slurry while the basic cobalt carbonate slurry is hot, transferring the dehydrated basic cobalt carbonate slurry into an immersion kettle, adding a saturated manganese chloride solution into the immersion kettle, performing a stirring reaction, and performing filter pressing dehydration and drying in sequence so as to obtainthe manganese-doped basic cobalt carbonate. Therefore, sodium carbonate is adopted to replace ammonium bicarbonate to prepare basic cobalt carbonate to serve as an ultrafine cobalt powder precursor, ammonia-containing wastewater is not generated, no pollution is caused to the atmosphere, the impurity content of the prepared precursor is low, and the production requirement of cobalt powder on the current market can be met; and moreover, saturated manganese chloride is adopted to dope basic cobalt carbonate, so that the conductivity of the basic cobalt carbonate precursor can be enhanced, and the stability is improved.

The invention discloses a method for recovering cefprozil from cefprozil crystallization mother liquor. The method is characterized in that the absorption, desorption and crystallization treatment is performed on the cooled cefprozil crystallization mother liquor by adopting macro-porous resin, and the purified cefprozil is recovered. The method comprises the following steps: by utilizing the macro-porous resin, in combination with the cooperation of the adsorption conditions of specific pH, temperature and flow rate and the desorption conditions of certain pH, temperature and flow rate of a specific analytical solution, effectively absorbing and efficiently desorbing the cefprozil remaining in the efprozil crystallization mother liquor through the macro-porous resin and recovering; finally de-coloring, crystallizing, filtering and drying the analytical solution to obtain a high-purity cefprozil product conforming to qualified product standard requirements. The method disclosed by the invention is high in recovery rate, simple and convenient to cooperate, low in cost, green and safe; and the residue of the cefprozil in the cefprozil crystallization mother liquor after recovery treatment is less than or equal to 1 mg / ml, so that the COD value of wastewater can be effectively reduced, and the environmental protection pressure and the wastewater treatment cost are reduced, and therefore, the economic and social benefits are significant.

The invention discloses an activated carbon desorption system for automobile exhaust gas treatment. The activated carbon desorption system comprises an adsorption device and a desorption device, wherein the adsorption device comprises a gas inlet and a gas outlet, an activated carbon layer is arranged in the middle of the adsorption device, and a feed bin is arranged above the activated carbon layer; the desorption device is communicated with the adsorption device, and a conveying pipeline used for conveying saturated activated carbon in the adsorption device into the desorption device is arranged between the desorption device and the adsorption device; a water filling nozzle and a discharge opening are formed in the desorption device, and a heating device used for evaporating liquid water to water vapor is arranged in the desorption device; a vacuum pump and a condensing device are arranged on the desorption device; one end of a lifting drying device is connected with the discharge opening of the desorption device, and the other end of the lifting drying device is communicated with the feed bin. The system can thoroughly desorb activated carbon, the adsorption rate of activated carbon in the recycling process is increased, and the energy consumption and the operating cost are reduced.

The invention discloses a method for recovering phosphorus by synthesizing blue-iron stone by means of combination of capacitive deionization and anaerobic iron reduction. The method comprises the steps of firstly, using a capacitive deionization technology to recover phosphorus-containing concentrated water by means of reverse desorption; then, synthesizing the blue-iron stone in the phosphorus-containing concentrated water by means of microbial allochemical iron reduction of an anaerobic system. The method concretely comprises the following steps: firstly, constructing a capacitive deionization device; then, carrying out capacitive deionization; finally, synthesizing the blue-iron stone and recovering. The method for recovering the phosphorus by obtaining blue-iron stone crystal by means of combination of the capacitive deionization technology and anaerobic iron reduction has an important significance for solving the problems of the treatment of phosphorus-containing wastewater and the crisis of phosphate rock resources.

The invention discloses a method for advanced removal of sulfide dioxide from mixed gas. Ionic gel with high degree of crosslinking is taken as an adsorbent and makes contact with the mixed gas, and sulfide dioxide is efficiently removed from mixed gas; the ionic gel with high degree of crosslinking has rich ion groups and specific compact polymer network, so that the ionic gel has unique adsorption function on sulfide dioxide, has the advantages of high adsorption capacity, superhigh selectivity and the like and can realize efficient desulfurization of the mixed gas; the ionic gel with high degree of crosslinking is simple, green, rapid to prepare, excellent in thermal stability and water stability and applicable to industrial large-scale production and application. Under the optimizationcondition, the removal rate of sulfide dioxide in the mixed gas is higher than 99%, and the recovery rate of other gases is higher than 99%; the ionic gel with high degree of crosslinking can realizecomplete desorption under the physical adsorption function, the one-time removal efficiency is improved, and long-time circulation use is facilitated.

The invention relates to a multifunctional antigas tapestry, which is mainly used to overcome the defect of the prior common tapestry with only appreciation of art and without absorption function for noxious gas and radiation ray. The multifunctional antigas tapestry is characterized in that the tapestry can be made by taking the activated carbon fiber yarn as raw material and using the weaving method of common carpet; or taking the activated carbon fiber felt as raw material and coating a layer of cotton or silk fabric with flare or other artistic effect on the felt surface (the felt surface must be polished before processing) based on the coating technique; or taking the activated carbon fiber fabric as raw material and printing the various decorative textures and patterns on the fabric surface after sewing with stacked layers; or taking the yarn mixed with activated carbon short fiber and terylene short fiber as raw material and using the weaving method of common carpet. The multifunctional antigas tapestry has the advantages that the tapestry can adsorb the toxic gas and the harmful radiation ray emitted by the decorative materials in living room, so the tapestry has not only the appreciation of art but also the specific environmental function.

The invention discloses a resin regeneration method for resin used for treatment on high-boiling residue wastewater, and belongs to the field of resin regeneration. The method comprises the following steps: 1) carrying out mechanical impurity removal on high-boiling residue wastewater; 2) adsorbing high-boiling residues in the effluent subjected to impurity removal through resin; 3) carrying out nitrogen stripping treatment on the resin adsorbed with the high-boiling residues; and 4) desorbing the resin subjected to air stripping treatment in the step 3) by a non-polar organic solvent. According to the present invention, with the application of the method to treat the resin, the regeneration rate of the resin is substantially improved compared to the direct desorption of the resin adsorbing the high-boiling-point substance by using the non-polar organic solvent.

The invention relates to an organic waste gas resource recycling device with a novel plate type structure. With the novel plate type structure, precooling, condensation, adsorption and separation processes can be integrated in the same one runner, and an organic waste gas channel and a refrigerant channel are separated by a stainless steel metal plate with a triangular fin. An adsorbent is filled in the triangular fin of the organic waste gas channel, and a refrigerant is filled in the fin channel at the other side of the metal plate. The condensation and adsorption can be simultaneously carried out through the structure. The condensed and adsorbed low-temperature tail gas is led to an upper core body of the device and used for precooling, thus improving the utilization rate of energy. The device consists of an upper part and a lower part which are connected by a flange, so that the device is conveniently assembled and disassembled and the adsorbent is conveniently changed.

The invention belongs to the field of research, development and application of the high-concentration petroleum-contaminated soil remediation technology, and further develops a cleaning-heat treatment coupling technology for high-concentration petroleum-contaminated soil. The technology achieves a treatment process for the high-concentration petroleum-contaminated soil. The technology comprises the following steps that cleaning pretreatment is conducted on the contaminated soil to be treated by utilizing a cleaning system which does not contain a surfactant medicament, and a treatment technology change time node is judged by investigating index changes such as particle size composition changes, dirty oil distribution variable coefficients, medium and low carbon number dirty oil component content and soil water content of the contaminated soil; and a thermal desorption treatment mode is coupled, so that the treatment of the high-concentration petroleum-contaminated soil to be treated is achieved. According to the cleaning-heat treatment coupling technology, the cleaning pretreatment process and the thermal desorption treatment technology are organically combined, the efficient and low-consumption treatment process for the high-concentration petroleum-contaminated soil is achieved, and good application and popularization prospects are achieved.

The invention relates to a regeneration and activation technique of solid adsorbent polluted by iodine, which comprises the following steps in sequence: the solid adsorbent polluted by iodine is placed in 0.01 to 1 percent of acetic acid for cleaning; (2) the cleaned adsorbent is soaked in sodium thiosulfate solution with the concentration of 0.01 to 2 percent in static state or placed in a column and the sodium thiosulfate solution with the concentration of 0.01 to 2 percent is injected for regeneration so as to lead the pollutants in effective pore channels of the adsorbent polluted by iodine to be precipitated completely; (3) then the obtained adsorbent is placed in the column and ion exchange is carried out by injecting active metal Ag<+> solution till the concentration of the active metal Ag<+> on the solid adsorbent reaches the concentration before the solid adsorbent is polluted. The invention has low energy consumption and convenient operation, in particular to the regenerative technique condition that any heating facility is not used, the concentration of the used regenerative liquid is low and can effectively desorb iodine pollutants; the appearance of the activated adsorbent is same as new carriers, is off white, is characterized by high silver-loaded quantity and high adsorption and effectively prolongs the service life of the adsorbent, thus reducing the cost of iodine desorption.

The invention relates to a device of increasing thermal-circular gas desorption efficiency and a method thereof. In the method, a by-pass system is added at each of the front and the back of an activated charcoal bed. On the basis of thermal-circular gas desorption, compressive condensation and a membrane separation system are employed for increasing desorption efficiency. During adsorption, a valve of the by-pass is closed so that the by-pass system is out of work; during desorption, an inlet-outlet valve of to-be-processed gas on the activated charcoal bed is closed and the valve of the by-pass is opened and then thermal gas desorption is carried out through circular heating by a circulating fan and a gas flow heater. When the gas is heated to a preset temperature, the valve and a pressure-reducing valve are opened, so that a part of the gas passes through an air compressor and then is condensed in a condenser to recycle organic solvents being high in purity, wherein the gas being not recycled is completely separated through the membrane separation system. High concentration gas is subjected to compressive condensation recycling before flowing-back to the air compressor through the valve, while clean gas is heated in the gas flow heater through the pressure-reducing valve and the valve and then is desorbed. The device is used of purification of polluted gas and recycling of organic solvents, is greatly increased in desorption efficiency and is increased in recycling purity and recycling efficiency of the organic solvents.

The invention discloses a method for conducting auxiliary microwave heating and high-pressure degumming on sisal hemp leaves. The method comprises the following steps of: removing moisture in the sisal hemp leaves; placing the dehydrated sisal hemp leaves in a reaction vessel, adding sodium hydroxide solution and sealing the reaction vessel; conducting microwave heating on the reaction container containing the sisal hemp leaves and the sodium hydroxide solution; and taking out and washing the sisal hemp leaves from the reaction container by clear water, and removing slag to obtain sisal hemp fiber. The temperature, needed by degumming, of the solution can be achieved within short time by adopting auxiliary microwave heating; and the sealed reaction vessel can generate high pressure in heating, thus being capable of enabling the solid gum on the sisal hemp leaves to be quickly detached from a solid fiber interface. Due to adoption of higher temperature and pressure, the sisal hemp leaves can be degummed within shorter time so as to obtain fiber in leaves. With the adoption of the method, the content of fiber in the sisal hemp leaves can be accurately determined, the determination speed is high, and the method plays an important role in the aspects of purchase, culture management, sisal hemp fiber machining and the like of the sisal hemp leaves.

The invention discloses an aluminum quantum well laser device and a preparation method thereof. The preparation method comprises the following steps: employing an ammonium polysulfide solution to process an oxide on an etching surface, and generating a sulfide protection layer; and sequentially growing a waveguide layer and a third InP layer on the surface of an InP substrate by adopting metal organic vapor deposition, and in the heating process before growth of metal organic vapor epitaxial deposition, and baking the etching surface to desorb sulfur atoms of a sulfide protection layer so as to generate elemental sulfur which is sublimated along with carrier gas. Compared with a traditional passivation technology, the process for solving the problem of oxidation of the etching surface of the laser containing the aluminum quantum well is low in cost, simple in process and high in stability.

The invention discloses a treatment method for oil field acidic sewage. The method is characterized by comprising the steps that firstly, air or nitrogen and oil field acidic sewage form parallel flow for gas-liquid mixing through a tubular static mixer, the gas-liquid volume ratio is controlled to be 2.5-3.0 at the temperature of 55-65 DEG C, the gas-liquid dispersion degree is smaller than 0.5 mm, and the time spent by the parallel flow in passing through the tubular static mixer is 2-5 seconds, the Reynolds number of the gas-liquid mixed flowing state is larger than 3000, then, sewage with acidic gas desorbed through gas-liquid hydrocyclone separation is fed into the flocculation and sedimentation procedures, and finally water with sediments separated out through flocculation and settlement is drained out. The method is adopted for treating the oil field acidic sewage, and the pH value of the sewage can be increased from 5.5-7.0 to 7.0-7.5. Meanwhile, the sewage corrosion rate can be controlled within 0.02 mm / a. According to the method, no alkaline chemical agent is added; the rapid and efficient gas-liquid mixing method is adopted, so that the equipment scaling possibility is effectively decreased. The method is used before flocculation and settlement of oil field sewage, can remarkably improve the flocculation and settlement effect and can effectively lower the dosage of a flocculant.

The invention discloses a dried blood spot carrier material for desorbing an electrospray ionization mass spectrum, and an application thereof in phospholipidomics; the dried blood spot carrier material is composed of a glass sheet and PARAFILM fixed on the glass sheet, and a sample application slot is formed in the PARAFILM. Since the PARAFILM is made of a non-cellulose base material, and the adsorption on compounds is weaker than that of a cellulose base material, so that the compounds can be desorbed more efficiently; in addition, the constituents of PARAFILM are very difficult to be ionized under the action of electrospray and are unlikely to bring impurity signals to the carrier material itself in mass spectrometry; and the sample application slot can prevent a blood sample from spreading on the one hand to improve the strength of the compounds, and can fix the blood spot on the other hand. By adopting the dried blood spot carrier material disclosed by the invention, the technicaldefects of the non-cellulose base material for DBSS in the DESI-MS analysis are solved, and it is possible to expand the research field of DBSS DESI-MS.

The invention discloses a treatment method of precious metal-containing wastewater, and belongs to the field of wastewater treatment and resource recycling. The method comprises the following steps: adsorbing the precious metal-containing wastewater by using resin, desorbing and regenerating the resin by using hot water, and controlling the pH value of the wastewater to be 4-6, so as to directly recover precious metals by using an electro-deposition method and reduce the operation links and lower the cost. According to the method, after the wastewater containing the precious metal is adsorbedand discharged, the concentration of the precious metal is reduced to 0.01 mg / L or below, and the emission standard of precious metal pollutants is met.

Disclosed catalytic low-energy-consumption waste gas treatment equipment comprises a spraying chamber, an adsorption chamber, a combustion chamber and a photocatalysis chamber, a gas inlet formed in one side of the spraying chamber is connected with a waste gas inlet pipe, and a gas outlet formed in the other side of the spraying chamber is connected with a gas inlet of the adsorption chamber through a gas outlet pipeline; and a gas outlet of the adsorption chamber is connected with a gas inlet of the combustion chamber through a combustion pipeline, a gas outlet of the combustion chamber is connected with the photocatalysis chamber through a catalysis pipeline, meanwhile, a branch pipeline is arranged on the catalysis pipeline, and the catalysis pipeline is connected with the adsorption chamber through the branch pipeline. Treated waste gas can reach the emission standard, no pollution is caused, and meanwhile, the energy consumption can be effectively reduced.

The invention discloses a regenerating method of an oil product desulfurization adsorbent. The method comprises the following specific steps: filling a closed filling box with an adsorbent uniformly and continuously vacuumizing the closed filling box to be close to a vacuum state by using a vacuum pump, wherein the vacuumizing time is 6h; heating the filling box to 60-80 DEG C and keeping the temperature for 1h; and blowing 99.999% nitrogen into the filling box through a blowing pipe of the filling box to blow the adsorbent, wherein the blowing speed is 6-8m / s and the blowing time is 0.5h andthe like. Organic matters in the adsorbent can be desorbed effectively in a manner of gradient temperature rise for many times, and meanwhile, adsorbates on the adsorbent can be quickly replaced and extracted by means of intermittent nitrogen blowing and replacement matched with vacuumizing. Meanwhile, longer-time replacement can be provided in a manner of integral gradient temperature rise-blowing and temperature rise-blowing again, so that the integral regenerating efficiency is higher, and the method is integrally pollution-free and more environment-friendly.

The present invention discloses a method for recovering zinc ions in willemite ore wastewater. The method comprises: (1) soaking chlorine balls in N,N-dimethylformamide adopted as a reaction solvent until the chlorine balls completely swell; (2) adding p-aminobenzoic acid adopted as a ligand to the product obtained in the step (1), adding a catalyst, and at a reaction temperature of 80-120 DEG C, carrying out a heating stirring reaction for 10 min under nitrogen protection; (3) filtering the product obtained in the step (2) to obtain a filter cake, soaking and washing the filter cake with the N,N-dimethylformamide adopted as the reaction solvent until the washing liquid is colorless, washing with distilled water, soaking with a NaOH solution, washing with distilled water, and washing sequentially with absolute alcohol, acetone and diethyl ether, and carrying out vacuum drying at a temperature of 50 DEG C to obtain an adsorption function resin; and (4) accurately weighing 15 mg of the dried resin, adding an acetic acid-sodium acetate buffer solution, soaking overnight, taking 50-100 mL of a supernatant after the willemite ore wastewater naturally precipitates, adding the swelling resin and the remaining acetic acid-sodium acetate buffer solution, taking out the resin after 10 h, and washing with a 0.5-2 mol / L HCl, wherein the washed solution is the zinc ion solution.

The invention discloses a gallium arsenide polishing solution which is prepared from the following raw materials in parts by weight: 20-40 parts of an abrasive, 3-7 parts of a surfactant, 1-3 parts ofa chelating agent, 1-6 parts of a pH value regulator, 1-3 parts of a humectant and 30-50 parts of deionized water, the preparation method disclosed by the invention has the benefits as follows: the low-stress, low-damage and ultra-smooth processing of gallium arsenide can be realized; meanwhile, the volatilization of water is reduced successfully in the using process, and the drying and crystallization of the polishing solution due to evaporation of the water are inhibited, in addition, during preparation, the raw materials are subjected to twice stirring and primary ultrasonic dispersion, sothat the consistency of the polishing solution and the dispersing performance of the raw materials can be ensured; finally, the prepared polishing solution is high in quality and good in using effect.

The invention discloses a leaching agent for diesel oil-based or / and white oil-based oil-containing drilling cuttings as well as a preparation method and an application thereof, belongs to the field of environment-friendly treatment of petroleum drilling, and solves the problem that no leaching agent is suitable for both diesel oil-based oil-containing drilling cuttings and white oil-based oil-containing drilling cuttings in the prior art. The invention relates to the leaching agent for diesel oil-based or / and white oil-based oil-containing drilling cuttings. The leaching agent comprises the following components in parts by volume: 80-95 parts of chlorinated hydrocarbon, 1-20 parts of isopropyl myristate and 1-20 parts of polysiloxane. The method is scientific in design and ingenious in conception. The invention creatively provides the leaching agent which can be used for diesel oil-based oil-containing drilling cuttings and also can be used for white oil-based oil-containing drilling cuttings. The leaching agent disclosed by the invention is non-flammable, high in safety, good in compatibility, capable of effectively desorbing various organic pollutants on the oil-containing drilling cuttings, and relatively good in biodegradability.

The invention discloses a method for repairing polluted soil through low-temperature thermal desorption with chemical drip washing. The method comprises the following steps: firstly, performing low-temperature thermal desorption treatment on mercury polluted soil so as to remove metal mercury, organic combined mercury and a part of inorganic combined mercury with a low melting point in the soil; secondly, performing drip washing with a mixed liquid containing organic acids, iodate and chlorine salts so as to remove mercuric oxide with a high melting point; and finally performing drip washing on mercuric sulfide with a high melting point with a mixed liquid of sodium sulfide and sodium hydroxide. By adopting the method, efficient removal of mercury of multiple valence states in mercury polluted soil can be achieved, a small amount of mercury is retained, the removal rate of mercury is up to 95% or greater, secondary pollution to the environment is avoided, and the cost is low.

The invention discloses an aluminum quantum well laser and a preparation method thereof. The preparation method comprises the following steps: using ammonium polysulfide solution to treat oxides on the etching surface, and forming a sulfide protective layer; using metal-organic vapor phase deposition on the surface of an InP substrate The waveguide layer and the third InP layer are grown sequentially. During the temperature rise process before metal-organic vapor phase epitaxy growth, the etched surface is baked to desorb the sulfur atoms of the sulfide protective layer, and the sulfur element is generated and sublimated with the carrier gas. Compared with the traditional passivation technology, the invented process for solving the oxidation problem of the etching surface of the aluminum-containing quantum well laser has low cost, simple process and strong stability.

The invention discloses a treatment method for oil field acidic sewage. The method is characterized by comprising the steps that firstly, air or nitrogen and oil field acidic sewage form parallel flow for gas-liquid mixing through a tubular static mixer, the gas-liquid volume ratio is controlled to be 2.5-3.0 at the temperature of 55-65 DEG C, the gas-liquid dispersion degree is smaller than 0.5 mm, and the time spent by the parallel flow in passing through the tubular static mixer is 2-5 seconds, the Reynolds number of the gas-liquid mixed flowing state is larger than 3000, then, sewage with acidic gas desorbed through gas-liquid hydrocyclone separation is fed into the flocculation and sedimentation procedures, and finally water with sediments separated out through flocculation and settlement is drained out. The method is adopted for treating the oil field acidic sewage, and the pH value of the sewage can be increased from 5.5-7.0 to 7.0-7.5. Meanwhile, the sewage corrosion rate can be controlled within 0.02 mm / a. According to the method, no alkaline chemical agent is added; the rapid and efficient gas-liquid mixing method is adopted, so that the equipment scaling possibility is effectively decreased. The method is used before flocculation and settlement of oil field sewage, can remarkably improve the flocculation and settlement effect and can effectively lower the dosage of a flocculant.