6045 results about "Ammonia" patented technology

The invention relates to the technical field of biological sewage treatment, in particular to a device and a method for improving the autotrophic nitrogen removal performance of an MABR (Membrane Ammonia Baffled Reactor). Coupling of partial nitrosation reaction and anaerobic ammonia oxidation reaction is completed; through a circular reaction zone and a membrane reaction zone in the reaction tank, nitrate nitrogen generated by anaerobic ammonia oxidation and excessive nitrite nitrogen during instability regulation are circularly removed, and the purpose of improving the total nitrogen removal effect of the reactor is achieved; a proper amount of a sodium nitrite solution is added at proper time, the concentration of free nitrous acid in a mixed solution of the reactor is increased, and the intermittent proportion of MABR intermittent aeration is synchronously regulated and controlled, so that the activity of nitrite oxidizing bacteria is synergistically inhibited by low dissolved oxygen and high free nitrous acid, and the unstable short-cut nitrification reaction is recovered again; the autotrophic nitrogen removal performance of the reactor is improved.

The present invention discloses a method for detecting and applying C1-C2-alkyl-substituted phenol isomers, which relates to the technical field of environmental detection and includes: selecting a corresponding sample pretreatment process to prepare a test sample according to the petroleum content range in the sample; under a mobile phase of methanol-5.0-6.5 mmol / L ammonia water, using LC-MS to detect the test sample to obtain the concentration of the first component and the standardized concentrations of co-eluted 3,5-dimethylphenol and 2,6-dimethylphenol; under a mobile phase of acetonitrile-4.0-10.0 mmol / L ammonia water, using LC-MS to detect the test sample to obtain the concentration of 3,5-dimethylphenol, or the standardized concentrations of co-eluted 3,5-methylphenol and 3-ethylphenol, or the standardized concentrations of co-eluted 2,6-dimethylphenol and 2,4-dimethylphenol; under a mobile phase of methanol-5.0-6.5 mmol / L ammonia water or acetonitrile-4.0-10.0 mmol / L ammonia water, using LC-MS to separately detect the calibration samples of the co-eluted components, and calculate the conversion factor of the co-eluted components and the concentration of the other component. The present invention realizes the accurate quantification of phenol and 12 C1-C2-alkyl-substituted phenol isomers.

The invention discloses a culture method of anaerobic ammonia oxidation granular sludge with a polydopamine modified charcoal-loaded Fe-Cu sodium alginate microsphere kernel, which comprises the following steps: modifying charcoal by using polydopamine, then carrying out Fe-Cu ion loading, finally preparing sodium alginate microspheres, and taking the prepared sodium alginate microspheres as the kernel to prepare the anaerobic ammonia oxidation granular sludge with the polydopamine modified charcoal-loaded Fe-Cu sodium alginate microsphere kernel. And co-culturing the sodium alginate microspheres and activated bacillus DMF-4 in an oxygen-free environment, continuously culturing for 3 weeks, and collecting by using a gravity settling or centrifugal method to obtain the anaerobic ammonium oxidation granular sludge with the sodium alginate microsphere core. The sodium alginate microspheres serving as the core provide large density and good morphological support for sludge particles, the problem of sludge bulking is avoided, and the settling performance is improved. According to the present invention, the sludge anti-shearing performance is improved, the adsorption capacity of the slowly released and continuously slowly released iron ions on organic matters, ammonia nitrogen and heavy metals is enhanced, the sewage treatment effect is improved, and the iron ions are the biodegradable material so as not to cause secondary pollution in the use process.

The invention discloses a short-cut denitrification-anaerobic ammonia oxidation system and an intelligent regulation and control method thereof, and belongs to the technical field of intelligent regulation and control of sewage treatment. Comprising the following steps: constructing and processing a machine learning data set to obtain a training set and a test set; based on the training set, a prediction model is established through a machine learning method, and prediction performance is evaluated to select an optimal prediction model; performing importance analysis on the data in the data set as feature data, and identifying key features; and taking the key features as optimization regulation and control parameters, and constructing an optimal control strategy through a particle swarm optimization algorithm. Compared with the prior art, the method has the beneficial effects that a system denitrification performance prediction model is constructed and optimized by utilizing a machine learning method by utilizing a large number of system operation parameters, microbial community structures and other multi-dimensional data, the operation characteristics of the system are fully reflected, and a unique optimal control strategy is designed and formed aiming at a specific scene; and the adaptability of the strategy is improved.

The present invention discloses a characterization method and application of C0-C2-alkyl-substituted phenols, relating to the technical field of environmental detection. The method includes: selecting a corresponding sample pretreatment process to prepare a test sample according to the petroleum content range in the sample; detecting the test sample by LC-MS under a mobile phase system of methanol-5.0-6.5 mmol / L ammonia water to obtain the concentration of the first component and the normalized concentrations of co-eluted 3,5-dimethylphenol and 2,6-dimethylphenol; detecting the test sample by LC-MS under a mobile phase system of methanol-7.0-11.5 mmol / L ammonia water to obtain the concentration of 3,5-dimethylphenol; detecting calibration samples of 3,5-dimethylphenol and 2,6-dimethylphenol respectively by LC-MS under a mobile phase system of methanol-5.0-6.5 mmol / L ammonia water, calculating a conversion factor, and obtaining the concentration of 2,6-dimethylphenol; and obtaining the contents of 13 single components of C0-C2-alkyl-substituted phenols based on the concentrations of the first component, 3,5-dimethylphenol and 2,6-dimethylphenol. The present invention realizes the quantitative characterization of 13 single components of C0-C2-alkyl-substituted phenols.

The invention relates to the technical field of industrial flue gas purification, and discloses a flue gas denitration pollution reduction and carbon reduction method and system based on model prediction control. The method comprises the following steps: collecting flue gas data through a sensor to obtain a flue gas distribution state; the state is processed through a preset model, and a nitrogen oxide concentration predicted value is determined; judging a regulation and control demand based on the predicted value and generating an adjustment coefficient sequence; calculating an opening value of an ammonia spraying distributor by adopting a particle swarm optimization algorithm, and determining ammonia spraying amount distribution; a control instruction is sent according to ammonia spraying amount distribution, and a temperature uniformity index is evaluated based on temperature feedback data; adjusting optimization algorithm parameters according to the indexes, and generating an optimized ammonia spraying strategy; updating the predicted value and determining the stable range of the denitration efficiency; verifying the ammonia escape concentration in the stable range to obtain a system performance index; and forming a continuous regulation and control sequence according to cyclic feedback of the indexes. According to the invention, accurate dynamic regulation and control of ammonia spraying amount are realized, denitration efficiency and system stability are effectively improved, and the risk of ammonia escape is significantly reduced.

Method and device for treating coking wastewater through denitrification and anammox are provided. The device includes an anaerobic reactor, an anoxic reactor, a sedimentation tank, and an aerobic reactor sequentially communicated, and a coking wastewater tank communicated with the anaerobic reactor through an influent pump. The present disclosure promotes the formation of microgranular sludge in the device through a composite powder carrier, and promotes sulfur-based autotrophic denitrification in anaerobic and anoxic zones through pyrite in the composite powder carrier and an additional sulfur source, and promotes anammox in the anaerobic zone through NO2−—N produced by sulfur-based autotrophic denitrification in the anoxic zone. The present disclosure forms a dual-sludge system through the sedimentation tank to reduce reducing inorganic sulfur-containing substances that compete with nitrifying bacteria, and achieves nitrification in the aerobic zone while oxidizing ionic reducing inorganic sulfur-containing substances. The present disclosure discharges treated wastewater through a membrane component.

The invention discloses preparation of an ionic porous nitrogen-rich molecular cage and application of the ionic porous nitrogen-rich molecular cage in purification of iodine-containing nuclear medical waste, and the preparation method comprises the following steps: taking an ammonia or amine reagent as a bridge, taking an aldehyde or ketone reagent as a reaction monomer, adopting a Schiff base reaction principle, and utilizing a polydentate coordination mode to carry out imine condensation reaction on substances through a one-pot method to obtain the ionic porous nitrogen-rich molecular cage. Generating a porous nitrogen-rich molecular cage; then adding a reducing agent to further reduce the porous nitrogen-rich molecular cage, then combining with alkyl halide and an organic solvent, stirring, and carrying out rotary evaporation to obtain the ionic porous nitrogen-rich molecular cage. The method has the beneficial effects that a porous organic cage material with an ionic nitrogen-rich ligand is selected as an adsorbent, so that the physical and chemical properties are stable; the preparation method is simple in synthesis and high in yield, and the nitrogen-rich ligand is stable in structure, can adsorb iodine in a gas phase and iodine in a water phase, and can be recycled; the ion interference resistance is high, and the method adapts to iodine adsorption under the water phase condition that the pH is 3-11; the method can be applied to treatment of iodine in nuclear medical wastewater.

The invention belongs to the technical field of microorganisms, and discloses a low-temperature-resistant aerobic denitrifying bacterium and application thereof. The low-temperature-resistant aerobic denitrifying bacterium is Enterobacter ludwigii CW-01, and the preservation number of the low-temperature-resistant aerobic denitrifying bacterium is CGMCC (China General Microbiological Culture Collection Center) No.27126. The low-temperature-resistant aerobic denitrifying bacterium can be used for preparing the The enterobacter lewis CW-01 strain disclosed by the invention can efficiently realize aerobic denitrification degradation of ammonia nitrogen, nitrate and nitrite within the temperature range of 4-35 DEG C, and is especially suitable for wastewater treatment in which the ammonia nitrogen, nitrate and nitrite are difficult to remove due to low temperature; the strain also has good salt resistance, and provides a good microbial material for biological nitrogen removal treatment of low-temperature, high-salt and high-ammonia nitrogen polluted water. The nitrogen is efficiently removed, meanwhile, the use amount of a carbon source is remarkably reduced, the enterprise cost is greatly reduced, and the method has a good application prospect in the field of sewage treatment.

The invention relates to the technical field of ammonia-nitrogen wastewater degradation, in particular to a deamination reactor optimization method based on CFD and BP neural networks. The method comprises the following steps: performing three-dimensional modeling according to geometric parameters of a deamination reactor, and obtaining a sample set; training a neural network through the sample set; and predicting the cavitation volume fraction and length in the deamination reactor by using a neural network. According to the deamination reactor optimization method based on the CFD and the BP neural network, the cavitation intensity of the deamination reactor is predicted based on a CFD numerical simulation result in combination with the neural network. CFD numerical simulation has the defects of low simulation speed, tedious operation steps and large workload, the cavitation intensity in the device with different parameters is calculated by constructing a neural network model, the amount of information to be processed is large, the calculation speed is high, complex problems can be rapidly processed, and the calculation efficiency is improved.

The invention discloses a denitration system inlet nitric oxide disturbance and super-emission control method and system, and the method comprises the steps: adjusting the operation oxygen amount and the over fire air ratio in real time based on the measured values of the carbon monoxide concentration and the nitric oxide concentration of the denitration system inlet; based on denitration system operation data, combining actual sampling delay time to carry out sample data alignment and construct a training sample set; constructing a prediction model based on the training sample set, obtaining a nitrogen oxide concentration prediction value of the inlet of the denitration system through the prediction model, and updating the prediction model in real time; based on the difference between the average value of the outlet nitrogen oxide concentration of each partition and a set value and the difference between the concentration value of the nitrogen oxide at the outlet of the denitration system and the set value, and by combining the predicted value of the nitrogen oxide concentration at the inlet of the denitration system, treatment measures after the nitrogen oxide concentration super-emission are set in a segmented mode. The control performance of the denitration system can be improved, the ammonia spraying amount is reduced, the ammonia escape concentration is reduced, and the system automation input rate is increased.

The invention relates to a method for preparing a high-concentration calcium chloride solution by using alkaline residues and ammonia distillation waste clear liquid, which comprises the following steps of: reacting a byproduct hydrogen chloride with the alkaline residues and the ammonia distillation waste clear liquid to obtain a calcium chloride solution with a certain concentration, adding calcium oxide to remove magnesium ions in the calcium chloride solution, and evaporating and concentrating by using waste heat of the ammonia distillation waste clear liquid to obtain the high-concentration calcium chloride solution. And finally, acidifying by using a byproduct hydrogen chloride to obtain a raw material for producing calcium chloride dihydrate in a calcium chloride factory. The process is simple and effective, solves the problem that the alkaline residues are easy to block in the prior art, fully utilizes the alkaline residues and the ammonia distillation waste clear liquid generated in the process of preparing alkali by an ammonia-alkali method, recycles waste heat in the ammonia distillation waste clear liquid, and improves the concentration of the calcium chloride liquid, so that the process has good practicability and economic value.

The invention belongs to the technical field of wastewater treatment, and provides an ammonium nitrate production wastewater treatment process which is mainly composed of a neutralization tank, a tubular heat exchanger, a precision filter, a ceramic filter, a concentrated stock solution box, an ionic membrane concentration device, a desalination stock solution box, an ionic membrane desalination device, a reverse osmosis water inlet box, an RO security filter and a reverse osmosis device. The neutralization adjusting system enables the content of dilute nitric acid or free ammonia in the condensate to be reduced to the minimum, normal operation of subsequent treatment procedures is not affected, the condensate is filtered by the filter and then enters a concentrated stock solution box of the electrodialysis system, and stable and normal work of the electrodialysis system is ensured; the concentrated solution containing ammonium nitrate is collected by the concentrated solution box, and then is recycled to a factory area for production by the concentrated solution recycling pump; produced water enters a qualified water tank to serve as circulating water supplementary water, and concentrated liquid returns to an electrodialysis system to be treated again; recycled liquid is recycled, energy is saved, cost is saved, and environment friendliness is achieved.

The invention discloses a large-scale pig breeding wastewater purification treatment system, and relates to the technical field of wastewater treatment.The large-scale pig breeding wastewater purification treatment system is characterized in that the ion concentration of anaerobic liquid is monitored through a multi-ion sensing array, and a multi-channel feeding system is controlled to synthesize customized struvite compound fertilizer; the AI prediction control unit predicts the optimal medicament dosage and realizes millisecond-level closed-loop regulation; the multi-dimensional synergistic biochemical treatment module comprises an A / O biochemical treatment unit and an electric field enhanced anaerobic ammonia oxidation reactor, the electric field enhanced anaerobic ammonia oxidation reactor applies a direct-current electric field through an electrode pair, and engineering conductive biochar is used as a carrier to accelerate microbial metabolism; the sludge low-temperature pyrolysis self-consistent circulation module is used for pyrolyzing and converting residual sludge into biochar, biofuel and wood vinegar, and the biochar activation treatment unit is used for preparing engineering conductive biochar and forming a substance closed loop through a self-consistent circulation conveying system; and the digital twinning intelligent management and control platform realizes intelligent management and control of the system.

The invention provides a treatment method of ammonia-nitrogen-containing wastewater, and belongs to the technical field of wastewater treatment. The preparation process comprises the following steps: preparing the wastewater treatment agent; preparing an immobilized microbial compound; and treating the ammonia-nitrogen-containing wastewater. According to the immobilized microbial carrier prepared by the invention, a stable dual-network structure and proper pore channels are formed through the synergistic effect of the polyvinyl alcohol, the carboxymethyl chitosan and the polyurethane; secondary cross-linking significantly enhances the stability of the carrier, optimizes internal pore channels, and is beneficial to attachment and proliferation of microorganisms; after the corn straw biochar is modified by Ca / Al, the specific surface area and functional groups are increased, and the physicochemical adsorption of ammonia nitrogen is enhanced. The three are combined, and ammonia nitrogen in wastewater is efficiently removed through synergism of carrier adsorption and microbial metabolism.

The invention belongs to the technical field of wastewater denitrification treatment, and particularly relates to an anaerobic ammonia oxidation reaction-based integrated partitioned denitrification method which comprises the following steps: S1, removing high-concentration organic matters and suspended matters in wastewater through coagulating sedimentation or chemical oxidation pretreatment to avoid inhibition on subsequent Anammox; s2, partitioning the integrated reactor, and setting a short-cut nitrification region and an Anammox reaction region; s3, enabling the effluent part of the Anammox reaction zone to flow back to the short-cut nitrification zone, supplementing nitrite and balancing the carbon nitrogen ratio; the Anammox granular sludge flows back to the reaction zone through the settling zone, and the biomass concentration and the reaction efficiency are maintained; s4, a secondary sedimentation tank or a built-in sedimentation zone is arranged to achieve mud-water separation, residual sludge is discharged, and it is guaranteed that effluent reaches the standard, and it is guaranteed that the denitrification efficiency is stable by dynamically adjusting dissolved oxygen of the short-cut nitrification zone and the pH value of the Anammox reaction zone.

The invention discloses a river nitrogen pollutant source analysis method based on drainage basin nitrogen turnover and isotope, and particularly relates to the technical field of water treatment.The river nitrogen pollutant source analysis method comprises the following steps that a drainage basin to be researched is selected, river water and soil samples in the drainage basin are systematically collected, and physical and chemical indexes and isotope indexes # imgabs0 # of the collected samples are tested. Nitrate marked by nitrogen isotope delta 15N / delta 18O and # imgabs1 # are used as key indication marks to perform high-precision identification on nitrogen sources in a river and an environmental system, the contribution proportion of different nitrogen sources to the nitrate concentration in a water body is quantified through a stable isotope analysis model, and the concentration of the nitrate in the water body is calculated. And in combination with data, the rates of denitrification and anaerobic ammonia oxidation in environmental samples, sediments and soil are directly measured through combined application of an isotopic tracer technology and a membrane inlet mass spectrometer technology.

The invention relates to the field of town sewage treatment, in particular to a town sewage carbon-nitrogen-phosphorus synergistic advanced treatment method based on biological manganese oxide. The method comprises the following steps: S1, configuring an upward flow denitrification filter tank; s2, a starting stage: taking a mixed solution of secondary effluent and secondary influent water of an actual town sewage treatment plant and manganese sulfate as influent water of a denitrification filter tank with the manganese concentration of 3.0 mg / L, inoculating hydrolytic acidification bacteria, denitrifying bacteria, anaerobic ammonium oxidation bacteria and manganese oxidation bacteria into the denitrification filter tank, and gradually increasing the ratio of the secondary influent water to the secondary effluent water in the mixed solution to 3%; s3, a stable stage: taking a mixed solution of secondary effluent and secondary inlet water of an actual town sewage treatment plant and manganese sulfate as inlet water of the denitrification filter tank, controlling the manganese concentration to be 3.0 mg / L, controlling the hydraulic retention time to be 3-4 hours, and controlling the backwashing period to be 9-11 days. The method can synchronously and efficiently remove carbon, nitrogen and phosphorus in the secondary effluent of the actual town sewage treatment plant at low cost.

The invention relates to a copper plating electroplating solution as well as a preparation method and application thereof. The copper plating electroplating solution comprises the following components: copper pyrophosphate, a complexing agent, ammonia water, a bath building agent, a gloss agent, a pH regulator and water, the complexing agent is selected from potassium pyrophosphate or sodium pyrophosphate; the mass percentage concentration of the ammonia water is 20%-30%, and the volume concentration of the ammonia water in the copper plating electroplating solution is 2-10 mL / L; the mass concentration of the gloss agent in the copper plating electroplating solution is 10 to 50 mg / L; and the pH value of the copper plating electroplating solution is 7.8-10. When the copper plating solution is used for silver grid line copper plating, on the premise that the cost is reduced, the silver grid line copper plating has a good plating effect, the silver grid line is firm and does not fall off, and good conductive performance is kept.

The invention discloses a water quality stabilizer suitable for in-furnace treatment of medium-pressure, high-pressure and ultrahigh-pressure boilers and a preparation method of the water quality stabilizer. The water quality stabilizer comprises polyamine organic amines, an organic deoxidant, high-molecular polymeric salt, a silt adjusting agent and pure water. According to the water quality stabilizer disclosed by the invention, one medicament can replace three medicaments of ammonia water, hydrazine and trisodium phosphate added in a traditional boiler, the water quality stabilizer has multiple functions of film forming, corrosion inhibition, deoxygenization, passivation, scale inhibition, scale dissolution, dispersion, chelation, water quality stabilization and the like, meanwhile, the discharge capacity of the boiler can be greatly reduced, the heat energy loss and the water waste can be reduced, and the heat energy utilization rate can be improved. The preparation method disclosed by the invention has the advantages of good batch production effect, stable product performance and long shelf life.

The invention discloses an A-site high-entropy solid oxide fuel cell cathode material as well as a preparation method and application thereof, and provides an A-site high-entropy solid oxide fuel cell cathode material Pr < 0.2 > M < 0.2 > La < 0.2 > Ba < 0.2 > Sr < 0.2 > Co < 0.8 > Fe < 0.2 > O < 3-delta > with a perovskite phase. The preparation method comprises the following steps: S1, weighing multi-element metal nitrates, and mixing to obtain a first mixed solution; s2, dissolving ethylenediamine tetraacetic acid in ammonia water to obtain a second mixed solution; mixing the first mixed solution, the second mixed solution and citric acid to form a mixed precursor solution; s3, carrying out second heating treatment on the mixed precursor solution, and adjusting the pH value to form a gel precursor; and S4, carrying out pre-sintering treatment, third heat treatment and calcination treatment on the gel precursor to obtain a high-grade powder precursor, and carrying out ball milling and sieving treatment to obtain the A-site high-entropy solid oxide fuel cell cathode material. The cathode material is high in stability and good in chemical compatibility with a barrier layer GDC, provides high-quality mass transfer channels and active sites for O2 / O- / O2-, and has good electrochemical performance at medium and low temperatures.

The invention relates to the technical field of hydrometallurgy, and particularly discloses preparation methods of ultralow-potassium ammonium molybdate and ultralow-potassium derivatives thereof. The preparation method of the ultralow-potassium ammonium molybdate comprises the following steps that S1, roasted molybdenum concentrate is subjected to primary screening, smashing and re-screening, and a raw material is obtained; s2, adding the raw materials and pure water into a reaction kettle, uniformly mixing, adding an acid solution, adjusting the pH value, introducing compressed air, heating, adjusting the pressure in the kettle, cooling and depressurizing, washing, and carrying out solid-liquid separation to obtain hydrated molybdenum trioxide; s3, mixing molybdenum trioxide hydrate with an ammonia water solution, adding ammonium sulfide, mixing for 1-2 hours, carrying out solid-liquid separation, then adding an adsorbent, mixing for 1-2 hours, cooling, aging for 24-48 hours, and carrying out solid-liquid separation to obtain an ammonium molybdate solution; and S4, concentrating the ammonium molybdate solution according to the specific gravity, and then carrying out cooling crystallization, solid-liquid separation, washing and drying to obtain the ultralow-potassium ammonium molybdate. The ammonium molybdate and the derivatives thereof prepared by the invention have relatively low content of potassium.

The invention relates to a continuous flow AOA whole-course anaerobic ammonia oxidation self-enrichment enhanced denitrification system and method, and the system comprises a front anoxic tank, an aerobic tank and a rear anoxic tank which are connected in series, and is filled with a biological filler; the monitoring aeration device comprises an ammonia nitrogen detector and an aeration unit which are connected with the aerobic tank; the reflux device is used for communicating a reflux outlet of the rear anoxic tank with water distribution of the front anoxic tank; and the PID control unit is connected with the monitoring aeration device, the backwashing control valve and the reflux device. The method comprises the following steps: sewage flows into the front anoxic tank, the aerobic tank and the rear anoxic tank; regulating and controlling the reflux ratio to domesticate the biological membrane of the aerobic tank; the ammonia nitrogen concentration of effluent of the aerobic tank is detected in real time through an ammonia nitrogen detector, and the PI D control unit dynamically adjusts the aeration rate of the aerobic tank according to the ammonia nitrogen concentration value and a preset target value, so that the aerobic tank and the rear anoxic tank form an anaerobic ammonium oxidation bacteria self-enrichment environment; the backflow device is used for enabling effluent of the rear anoxic tank to flow back to the front anoxic tank according to a preset proportion, so as to form a whole-process anaerobic ammonia oxidation self-enrichment environment.

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a method for separating metal molybdenum and rhenium from a nickel-based superalloy electrochemical dissolving solution, which comprises the following steps: providing the nickel-based superalloy electrochemical dissolving solution, and adjusting the pH value to 0-1.5; the modified MTS9570 resin is used for adsorbing the nickel-based superalloy electrochemical dissolving solution to obtain a molybdenum-absorbed solution, then a sulfuric acid solution is used for leaching, then an ammonia water solution is used for desorption, and a molybdenum desorption solution is obtained; adjusting the pH value of the molybdenum-absorbed solution to 0.5-1.5, adsorbing with modified MTA1721 resin, leaching with a sulfuric acid solution, desorbing with an ammonium sulfate and ammonia water mixed solution, and desorbing with an ammonia water solution to obtain a second-stage rhenium desorption solution; and the molybdenum desorption solution and the second-stage rhenium desorption solution are subjected to evaporation concentration, crystallization, recrystallization and high-temperature hydrogen reduction respectively, and metal molybdenum and rhenium are obtained. According to the method for separating rhenium and molybdenum from the nickel-based high-temperature alloy electrochemical dissolving solution, the rhenium and molybdenum recovery rate and rhenium purity are improved, and the process is simple, convenient and practical.

The invention relates to the technical field of microorganisms, and discloses a sewage aquatic microbe with ammoxidation capacity, a microbial agent and application of the microbial agent. The strain name of the sewage aquatic microbe is B1, and the preservation number of the sewage aquatic microbe is CCTCC No: M 2025640. The sewage aquatic microbacterium B1 provided by the invention can convert ammonia nitrogen into nitrite nitrogen, so that short-cut nitrification is realized in wastewater treatment, and the strain can tolerate and effectively treat ammonia nitrogen with relatively high concentration, and has relatively good adaptive capacity to environments with different pH values, salinity and temperatures.

The utility model discloses a flue gas denitration device, which relates to the technical field of flue gas denitration and comprises a treatment tank, a liquid storage tank and a liquid collecting cover, the liquid collecting cover is fixedly mounted in the treatment tank, a plurality of liquid spraying pipes are arranged at the bottom of the liquid storage cover, vent holes are formed between two liquid spraying pipes in a row of liquid spraying pipes, and the liquid storage tank is fixedly mounted on the treatment tank; the interior of the liquid storage tank is divided into two cavities for containing a denitration ammonia water solution and water through a partition plate, the liquid collection cover is fixedly connected with a first liquid guide pipe and a second liquid guide pipe, and the first liquid guide pipe and the second liquid guide pipe both penetrate through the treatment tank and extend into the two cavities of the liquid storage tank correspondingly; the technical problems that the interior of an existing flue gas denitration device is inconvenient to clean, the denitration efficiency is affected for a long time, smoke and an ammonia water solution are not prone to being in full contact, the reaction speed is low, and the purification effect is poor are effectively solved.

The invention belongs to the technical field of industrial flue gas purification, and discloses an ammonia desulfurization optimization control system based on a machine learning algorithm, which comprises a feature extraction module, a working condition clustering module, a dynamic optimization module and a self-adaptive feedback module, the feature extraction module is used for collecting multi-dimensional operation parameters in a coal burning process, performing data dimension reduction through a PCA algorithm, and extracting key working condition features; the working condition clustering module identifies different operation working condition modes; the dynamic optimization module can construct a multi-modal optimization neural network based on different operation condition modes, and generates optimal control parameters in real time. Through PCA dimension reduction processing of the feature extraction module and in combination with a working condition clustering algorithm, automatic mode recognition and strategy switching under complex working conditions are achieved, fluctuation of desulfurization efficiency is reduced, and meanwhile the problems that the ammonia water adding amount depends on experience setting, raw material waste and secondary pollution are likely to be caused, and the operation and maintenance cost is large are solved.

The present invention relates to a method and an apparatus for producing nitrile with controlled spray liquid input pressure. According to the manufacturing method, spraying liquid can be atomized, the contact area with ammonia is increased, and the mass transfer efficiency is improved. The present invention relates to a method for producing nitrile, comprising a step (referred to as a reaction step) for producing a nitrile-containing reaction product by subjecting a hydrocarbon raw material to an ammoxidation reaction, and a step (referred to as a cooling step) for cooling the reaction product by spraying a spray liquid onto the reaction product by means of a spraying device, the spraying device comprises a spraying liquid inlet, a first spraying pipe in fluid communication with the spraying liquid inlet, and a plurality of second spraying pipes which are in fluid communication with the first spraying pipe, are perpendicular to the first spraying pipe and extend towards the two sides of the first spraying pipe. The first spraying pipe is communicated with the first spraying pipe through fluid, the second spraying pipe is communicated with the second spraying pipe through fluid, the third spraying pipes are communicated with the second spraying pipe through fluid and extend towards the two sides of the second spraying pipe perpendicular to the second spraying pipe, the nozzles are located at the tail ends of the third spraying pipes and communicated with the third spraying pipes through fluid, and in the cooling step, the spraying liquid input pressure of a spraying liquid inlet is controlled to be 0.06-1.00 MPaG.

The invention discloses a high-activity short-cut nitrification quick-start long-term stable operation process, which relates to the technical field of biological sewage treatment, and comprises the following steps: inoculating sludge, carrying out anaerobic fermentation pretreatment, and removing expanded sludge and sludge foam in combination with quick sludge discharge and manual removal; controlling the number of days of sludge age, reproliferating the sludge, enriching ammonia oxidizing bacteria, and inhibiting and elutriating nitrite oxidizing bacteria; long-term operation is carried out under the condition of no sludge discharge, the abundance and activity of ammonia oxidizing bacteria are maintained, and meanwhile, the abundance of nitrite oxidizing bacteria is controlled; the proliferation of nitrite oxidizing bacteria is controlled by using the predation effect of protozoa and metazoan, and the accumulation rate of nitrite in the reactor is controlled; monitoring the dissolved oxygen, the pH value and the concentrations of ammonia nitrogen, nitrite nitrogen and nitrate nitrogen in the reactor in real time, and regulating and controlling the influent ammonia nitrogen load and the free ammonia concentration; dissolved oxygen distribution is adjusted in an intermittent aeration or microporous aeration mode, and the operation conditions of the short-cut nitrification reactor are optimized. The method is simple to operate, economical and effective.

The invention belongs to the technical field of sewage treatment, and particularly relates to an anaerobic ammonia oxidation-photoelectric denitrification deep nitrogen removal method. The method comprises the following steps: firstly, adopting a double-chamber reactor; introducing part of sewage into the cathode chamber, carrying out Anammox reaction under a dark state condition to remove ammonia nitrogen and part of nitrite nitrogen, and synchronously generating nitrate nitrogen; turning on a light source to irradiate the anode chamber, exciting photo-induced electrons by a photosensitizer, transmitting the photo-induced electrons to the cathode chamber through an external circuit, and driving the sulfur autotrophic denitrification sludge to reduce residual nitrite nitrogen and nitrate nitrogen generated by Anammox; the total nitrogen removal rate is close to 100%. According to the invention, photo-induced electrons are used as the only denitrification electron donor, so that the addition of a carbon source / sulfide is thoroughly avoided, and the risk of secondary pollution is eliminated. The method is suitable for green low-carbon deep treatment of sludge digestion liquid and pharmaceutical wastewater high-ammonia-nitrogen low-carbon-nitrogen-ratio sewage.