439 results about "Deoxygenation" patented technology

An improved method and apparatus for removing acid gases and other impurities from raw biogas streams, such as biogas from landfills or biogas from controlled anaerobic digestion, is disclosed. The method provides efficient generation of high-purity renewable natural gas from raw biogas. The biogas is treated in a multi-stage membrane system integrated with compression equipment. The membrane separation units are arranged into interconnected high-pressure and low-pressure gas recycling loops powered by high-pressure and low-pressure compressors. The multi-stage membrane system can be integrated with deoxygenation and auxiliary nitrogen removal systems. The combined system provides for the generation of efficient contaminant removal from raw biogas to generate high-purity methane products with reduced compression energy consumption.

The invention relates to the technical field of biodiesel hydrogenation catalysts, and particularly discloses a hydrogenation catalyst of organic bentonite loaded cerium-zirconium solid solution and nickel-molybdenum phosphide as well as a preparation method and application of the hydrogenation catalyst. The hydrogenation catalyst with the organic bentonite loaded with the cerium-zirconium solid solution and the nickel-molybdenum phosphide comprises an organic bentonite carrier, the cerium-zirconium solid solution and the nickel-molybdenum phosphide, the loading capacity of the cerium-zirconium solid solution on the organic bentonite carrier is 2-2.5 wt%; the cerium-zirconium solid solution comprises cerium dioxide and zirconium dioxide; the loading capacity of the nickel molybdenum phosphide on the organic bentonite carrier is 10-15 wt%; and the nickel molybdenum phosphide is Ni2Mo3P. The organobentonite carrier provides an acid site and promotes deoxidation path optimization, the layered structure of the organobentonite carrier can limit the cerium-zirconium solid solution and the nickel-molybdenum phosphide, and organic groups are also embedded into the layered structure, so that the organic compatibility of the organobentonite carrier to biodiesel is improved, and the catalytic efficiency is improved. The cerium-zirconium solid solution provides oxygen vacancies, promotes hydrogenation / deoxidation, and improves the thermal stability and sintering resistance of the catalyst.

An improved method and apparatus for removing acid gases and other impurities from raw biogas streams, such as biogas from landfills or biogas from controlled anaerobic digestion, is disclosed. The method provides efficient generation of high-purity renewable natural gas from raw biogas. The biogas is treated in a multi-stage membrane system integrated with compression equipment. The membrane separation units are arranged into interconnected high-pressure and low-pressure gas recycling loops powered by high-pressure and low-pressure compressors. The multi-stage membrane system can be integrated with deoxygenation and auxiliary nitrogen removal systems. The combined system provides for the generation of efficient contaminant removal from raw biogas to generate high-purity methane products with reduced compression energy consumption.

The invention relates to the technical field of plateau medicine and intelligent medical equipment, and discloses a stepped deoxidation treatment system for plateau crowd hypoxia acclimatization time and application, and the system comprises a data acquisition module, an initial information input module, a central processing module and an oxygen flow regulation and control module. The system inputs individual genetic background and baseline physiological data of a patient, and acquires multi-modal physiological parameters and hypoxia-induced biomarkers in real time. The central processing module fuses multi-source information, constructs a multi-modal physiological load index, dynamically divides a habit stage by combining genetic information, and then inputs the multi-modal physiological load index and the habit stage into an adaptive optimization model to generate an oxygen flow regulation instruction. And the oxygen flow regulation and control module executes an instruction to control oxygen supply to form dynamic closed-loop feedback. According to the method, the personalized self-adaptive deoxidation path can be generated, and the efficiency and accuracy of hypoxia acclimatization are improved on the premise of guaranteeing safety.

The invention relates to the technical field of deoxidation regulation and control, in particular to plateau adaptability intelligent stepped deoxidation regulation and control equipment and method, and the method comprises the steps: obtaining multi-dimensional index sign data of a target in a plurality of oxygen supply stages in a plateau environment; determining a first adaptive state of the target at each moment according to the time sequence change of the multi-dimensional index sign data of the target in the first oxygen supply stage; according to the first adaptive state, determining the adaptive duration for the target to reach a stable state, and according to the adaptive duration and the time sequence change of the multi-dimensional index sign data, determining the adaptive capacity of the target to hypoxia; determining an oxygen supply concentration adjustment value when entering a second oxygen supply stage according to the adaptive capacity, and determining an actual stepped concentration adjustment moment of the second oxygen supply stage by taking preset stepped concentration adjustment data as a reference; and determining a target second adaptive state according to the oxygen supply concentration adjustment value and the actual stepped concentration adjustment moment, and determining a stepped concentration adjustment value of the second oxygen supply stage according to the second adaptive state.

Disclosed is an oxygen scavenger composition including iron powder, activated carbon, water, a halide of an alkaline earth metal, and an alkaline substance, in which a content of the activated carbon is 20 parts by mass or more and 40 parts by mass or less with respect to 100 parts by mass of a content of the iron powder, a content of the water is 230 parts by mass or more and 370 parts by mass or less with respect to 100 parts by mass of the content of the activated carbon, and a content of the halide of the alkaline earth metal is 50 parts by mass or more and 65 parts by mass or less with respect to 100 parts by mass of the content of the water.

The present application relates to the technical field of direct air carbon capture, in particular to a solar-driven air thermo-chemical deoxidization direct air carbon capture method and system, the present application adopts chemical looping air separation technology, first removes oxygen in air through an oxidation reactor and a reduction reactor, then sends the oxygen-poor air into a DAC carbon capture unit for decarburization, which can greatly reduce the air treatment amount of the DAC unit; at the same time, the present application uses solar energy to power the chemical looping reduction reactor, realizing clean and efficient power supply of the DAC unit; therefore, the solar-driven air thermo-chemical deoxidization direct air carbon capture method and system of the present application adopts a combination of chemical looping air separation and DAC, and uses the oxygen-poor air at the outlet of the chemical looping air separation oxidation reactor to drive a waste heat power generation unit to generate power, so as to meet the power and steam supply of the air decarburization process, thereby solving the problems of high energy consumption and high cost of the existing DAC technology.

This invention discloses a core-shell bifunctional catalyst, its preparation method, and its applications. The catalyst's deoxygenation core is an oxide containing one or more of the following non-precious metals: Mn, Cu, Ni, Ce, or precious metals: Pt, Pd, Rh, Ru, Au, Ag. The desulfurization shell is an oxide containing one or more of the following: Al, Mg, Zr, Zn, Fe, Ni, Mo, W, Co. This invention addresses the industry pain points of existing low-temperature methanol washing processes in coal chemical industries, such as lengthy syngas sulfur and oxygen purification processes, easy sulfur poisoning and deactivation of deoxygenation catalysts, and direct CO2 emissions from tail gas causing carbon emissions and resource waste. Through a self-developed core-shell bifunctional catalyst, it simultaneously achieves ultra-deep removal of all forms of sulfides and oxygen from syngas within a single reactor, while simultaneously realizing the high-value reuse of CO2 from tail gas.

The embodiment of the invention relates to the field of cooling devices of pressure vessels, in particular to an oxygen control device, a lead-bismuth reactor and a method for adjusting the oxygen content of lead-bismuth alloy in the reactor. According to the oxygen control device provided by the embodiment of the invention, the oxygen content data of the lead-bismuth alloy in the container is measured and obtained in real time by arranging the measuring piece and the control assembly, and then the oxygen content level in the container is adjusted in real time by utilizing the deoxygenation mass exchanger and the oxygen release mass exchanger; therefore, the oxygen concentration in the lead-bismuth alloy is accurately maintained in a preset range, so that stable operation of a cooling system is ensured; the closed space is formed among the container, the oxygen removal mass exchanger and the oxygen release mass exchanger, so that the oxygen content adjustment process of the lead-bismuth alloy is realized in a closed environment, impurities are prevented from being mixed in, and the quality of the lead-bismuth alloy is ensured. According to the lead-bismuth reactor provided with the oxygen control device, the content of oxygen in the lead-bismuth alloy can be actively adjusted, and long-term stable operation of the reactor is achieved.

The present application relates to the technical field of metal powder preparation, and specifically discloses a method for preparing metal powder with low oxygen content. A method for preparing metal powder with low oxygen content, comprising: S1, weighing metal raw materials and smelting to obtain molten metal; S2, atomizing the smelted molten metal through an ultrasonic atomizing device, using liquid carbon dioxide and argon as cooling media to cool the molten metal to form metal powder; S3, placing the metal powder in a closed reactor, using argon as a carrier gas, passing it into a container filled with aluminum isopropoxide solution and zirconium acetylacetonate solution, atomizing the two solutions through an atomizing nozzle and reacting them with the metal powder; S4, adding the metal powder after the S3 reaction into a pulse current heating device for pulse deoxygenation treatment. The metal powder of the present application can meet the material performance requirements of high-end fields such as aerospace, precision machinery manufacturing, etc., and has the advantages of low oxygen content and high sphericity.

The design method of the high-energy additional fluid discharge structure of the ship condenser relates to the field of high-energy fluid discharge of the surface condenser of the energy power system. It solves the problem that the existing condenser structure design method only considers the energy level reduction and does not consider the optimization of the structural parameters, resulting in the incompatibility of the input high parameters (temperature, pressure, etc.) with the actual application scenario in a small space. The present invention determines the fluid type according to the input fluid thermodynamic parameters and the condenser saturation parameters; determines the fluid energy level according to the water inlet / steam port inner diameter and the fluid thermodynamic parameters; judges the condenser body water inlet / steam port position according to the fluid deoxygenation state or the fluid energy level; determines the type and parameters of the selected diffusion element according to the fluid energy level; evaluates the life of the diffusion element to judge whether the life of the diffusion element meets the service life requirements. If the result is yes, the process ends; if the result is no, the curvature and thickness of the diffusion element are adjusted to meet the service life requirements. The present invention is mainly used for condenser structure design.

A catalyst suitable for catalytic deoxidation to produce high-purity hydrogen in the hydrogen production industry and a preparation method thereof belong to the field of catalyst technology. The preparation method of the catalyst suitable for catalytic deoxidation to produce high-purity hydrogen in the hydrogen production industry comprises five steps: preparing a slurry, forming, hydrolysis and solidification, oxidative roasting, and hydrogen reduction. The catalyst suitable for catalytic deoxidation to produce high-purity hydrogen in the hydrogen production industry obtained by the present invention has catalytic deoxidation performance, can reduce the outlet oxygen volume concentration to 1.47-2.54 ppm, and has a crushing strength of 125-130 N·cm ‑1 , the wear rate is 0.5~0.9%.

The invention relates to the technical field of heat exchange, and provides a deoxidizing device applied to a condenser and a low-noise hybrid condenser. The deoxygenization device comprises an outer layer component, an inner layer component and an outer layer component, the inner-layer component is arranged in the outer-layer component, a steam main flow channel is formed between the inner-layer component and the outer-layer component, an oxygen removal liquid cavity is formed in the inner-layer component, the inner-layer component is provided with a steam flow dividing channel and an immersion flow channel, the steam flow dividing channel is communicated with the steam main flow channel and the oxygen removal liquid cavity, and the immersion flow channel is communicated with the oxygen removal liquid cavity. Liquid immersed in the flow channel is suitable for carrying out dividing wall type heat exchange with steam in the steam diversion channel, the superheat degree difference between the steam and the liquid in the deoxygenization liquid cavity is reduced, at least part of the steam completes gas-liquid phase change in the steam diversion channel, direct impact between the steam and the liquid in the deoxygenization liquid cavity is avoided, and the deoxygenization effect is improved. And a noise source of bubble collapse caused by rapid condensation when the steam is in direct contact with the liquid is reduced.

The application discloses a deoxygenation method and a deoxygenation adsorbent for Fischer-Tropsch synthesis oil, and relates to the field of Fischer-Tropsch synthesis oil processing.The deoxygenation method comprises the following steps: introducing Fischer-Tropsch synthesis oil into an adsorption tower filled with the deoxygenation adsorbent, and removing oxygen-containing compounds.The deoxygenation adsorbent is prepared by the following method: step S1, adding an aluminum source, a silicon source and a template agent into a lye, and performing first aging at room temperature; continuously adding the aluminum source and the silicon source, and performing second aging at room temperature; performing crystallization at a predetermined temperature; and filtering and washing the product to obtain a molecular sieve; and step S2, immersing the molecular sieve in a lye, adding a template agent into the lye, and then performing crystallization; and filtering, washing, drying and calcining the product after the crystallization to obtain the deoxygenation adsorbent.The deoxygenation method for Fischer-Tropsch synthesis oil provided by the application significantly improves the quality of Fischer-Tropsch synthesis oil and the economic benefits of subsequent processing by preparing a deoxygenation adsorbent with multiple levels of pores and combining the adsorption tower.

The utility model relates to the technical field of boiler make-up water, in particular to a gas turbine boiler make-up water deoxidizing and desalting device which comprises a deoxidizing cylinder, a fixing frame is fixedly connected to the outer portion of the deoxidizing cylinder, a deoxidizing assembly used for deoxidizing make-up water is arranged in the deoxidizing cylinder, and the deoxidizing assembly comprises a rotating cylinder rotationally connected to the interior of the deoxidizing cylinder. A first rotational flow plate and a second rotational flow plate are fixedly connected to the exterior of the rotary drum, the length of the first rotational flow plate is larger than that of the second rotational flow plate, and a liquid inlet pipe and a material adding pipe are communicated with the top of the deoxidizing drum. The efficient deoxidization and desalination integration is realized, the problems of large occupied space and non-uniform fluid distribution caused by a split structure of traditional equipment are avoided, the introduction of a rotating structure improves the water flow disturbance, and the deoxidization and desalination process is more sufficient.

This invention relates to the field of environmental remediation technology, specifically providing a method for the synergistic degradation of chlorinated organic pollutants using anaerobic microorganisms and iron-manganese minerals. The method includes the following steps: S1, after deoxygenation, water containing chlorinated organic pollutants is inoculated into a bacterial culture system, and the reaction system is placed in a constant-temperature shaking incubator for anaerobic reaction; S2, iron-manganese minerals are added to the reaction system, and a secondary reaction is carried out under aerobic conditions, thus completing the degradation of chlorinated organic pollutants. This invention significantly improves the overall purification efficiency of complex pollution systems containing chlorinated organic pollutants through an anaerobic-aerobic coupling and a synergistic biodegradation-chemical oxidation strategy, demonstrating promising application prospects.

The invention discloses a preparation method and application of 1, 4-bis (diphenylphosphine) butane platinum dichloride (II), and the preparation method comprises the following steps: (1) mixing absolute methanol and dichloromethane, carrying out deoxidation treatment, and adding 1, 4-bis (diphenylphosphine) butane into the mixture; (2) dissolving potassium chloroplatinite in distilled water, filtering insoluble impurities, dropwise adding the potassium chloroplatinite into the reaction system in the step (1) under the protection of inert gas while keeping a stirring state, and after dropwise adding, heating, refluxing and stirring for reaction; (3) carrying out filter pressing under the protection of inert gas, passing through a silica gel column, and collecting filtrate; (4) concentrating the filtrate, and then adding an organic solvent for pulping; and (5) carrying out filter pressing under the protection of inert gas, washing a filter cake, and carrying out vacuum drying. According to the preparation method, the product yield is high, the purity is high, and the obtained 1, 4-bis (diphenylphosphine) butane platinum dichloride (II) is used for hydrogenation reaction of carbonyl compounds and has good catalytic performance.

The utility model discloses a deep treatment device for red mud leachate through catalytic ozonation. The red mud leachate treatment system comprises a solid-liquid separation unit, a homogenizing unit, a high-salt biochemical reaction unit, a catalysis unit for preparing a manganese-based catalyst, and a catalytic ozonation tower for performing catalytic ozonation on the red mud leachate, which are communicated in sequence, wherein the solid-liquid separation unit and the homogenizing unit are used for pretreating the red mud leachate; the catalytic ozonation tower is provided with a deoxidation unit, and the sludge treatment unit is respectively communicated with the solid-liquid separation unit, the homogenizing unit and the high-salt biochemical reaction unit. According to the utility model, the solid-liquid separation unit and the homogenizing unit are arranged to pretreat the red mud leachate, the obtained liquid material is subjected to catalytic ozonation through the catalytic ozonation tower to obtain an oxide material, and the oxide material is deoxidized through the deoxidation unit to obtain treated effluent; and sulfides and COD can be better removed.

Systems and methods are provided for reducing hydrogen consumption during deoxygenation of bio-derived (or at least partially bio-derived) feedstocks. The reduced hydrogen consumption is achieved by performing the deoxygenation in the presence of a bulk multimetallic catalyst and / or in the presence of a base metal dewaxing catalyst having reduced metal stack heights. Additionally, due in part to being able to reduce or minimize hydrogen consumption, the heat release during deoxygenation can also be reduced, thus allowing a smaller catalyst volume to perform deoxygenation.

A process for converting a carbon oxide into a renewable product, particularly a carbon oxide produced from the hydroconversion of a biofeedstock. The process comprises contacting a carbon oxide containing process stream with a catalyst system under catalytic conditions to convert the carbon oxide to non-carbon oxide products, wherein the catalyst system comprises a noble metal catalyst. The process may be used in an integrated process for producing a renewable fuel and a renewable product from a carbon oxide, the integrated process comprising a biofeedstock hydroconversion process and a carbon oxide deoxygenation process wherein a carbon oxide byproduct from the hydroconversion process is contacted with a catalyst system comprising a noble metal catalyst to produce a renewable product.

This utility model discloses an aerobic mixed liquor nitrification and deoxygenation treatment device, including a first nitrification tank. A nitrite-containing bacteria storage tank is located at the top of the first nitrification tank. An inlet pipe is located at the top of one side of the first nitrification tank, and one side of the inlet pipe extends into the interior of the first nitrification tank and is equipped with a sludge-water separation chamber. Through the cooperation of the inlet pipe, sludge discharge pipe, screen, and sludge-water separation chamber, this utility model can separate the sludge mixed in with the mixed liquor during its inflow, while also facilitating the return of the sludge to the treatment tank. Then, through the cooperation of a second discharge pipe, a third pump, a pump installation chamber, a distribution plate, a distribution pipe, a heat dissipation chamber, and a fan, the mixed liquor can be continuously circulated and cooled during the nitrification reaction, thereby maintaining the mixed liquor at 20-30°C to preserve the activity of nitrite-containing bacteria and nitrifying bacteria in the mixed liquor and ensure reaction efficiency.

The invention discloses a hydrophobic monomer copolymer oil-displacing agent with a demulsification function and a preparation method, and relates to the technical field of oilfield chemistry. The preparation method comprises the following steps: stirring a linear block polyether demulsifier and sodium hydroxide for reaction under a high-temperature condition; the preparation method comprises the following steps: preparing a linear block polyether demulsifier, stirring the linear block polyether demulsifier with p-chloromethyl styrene which is equal to the linear block polyether demulsifier in mole to react to obtain a hydrophobic monomer A with a demulsification function, dissolving the hydrophobic monomer A, acrylamide, potassium persulfate and VA-044 in a deionized water solution to obtain a reaction solution, introducing nitrogen to remove oxygen, adding sodium hydrogen sulfite, and carrying out adiabatic reaction until the temperature of the system is not increased any more; and crushing a polymer rubber block obtained after the reaction is completed, hydrolyzing in a sodium hydroxide solution, drying, and crushing. The oil-displacing agent contains a block polyether demulsifier structural unit, has better temperature resistance compared with linear high-molecular-weight hydrolyzed polyacrylamide and common hydrophobic modified polyacrylamide, and has no negative influence on demulsification and dehydration of crude oil emulsion.

The application discloses a synthesis method of 3,3-difluorocyclopentylamine hydrochloride, and particularly relates to the technical field of chemical synthesis. The synthesis method comprises the following steps: taking 2-cyclopentenone and phthalimide as raw materials, and sequentially performing a Michael addition reaction, deoxygenation fluorination, removal of a phthaloyl protecting group, Boc protection and deprotection and salt formation reaction to obtain 3,3-difluorocyclopentylamine hydrochloride. The synthesis route and process design of the application are reasonable, the starting raw material is 2-cyclopentenone, the required reaction condition is mild, the post-treatment method is simple, the operability is strong, the raw material and reagent are cheap and easy to obtain, and the total yield can reach 43.6%, so the synthesis method has large-scale preparation value.

The application relates to the field of mixed gas purification and discloses application of gaseous alkane in reducing the risk of combustion and explosion in the deoxidation process of oxygen-containing gas, which comprises: mixing the oxygen-containing gas with hydrogen in the presence of stabilizing gas to perform an oxidation reaction; wherein the stabilizing gas is gaseous alkane, and the oxygen-containing gas contains oxygen and optional other flammable gas. The method for deoxidizing the oxygen-containing light hydrocarbon by hydrogen provided by the application reduces the risk of combustion and explosion of the mixed gas by taking gaseous alkane as the stabilizing gas, adopts the hydrogen-catalyzed reaction to promote the reaction of oxygen in the mixed gas with hydrogen to generate water, achieves the purpose of deoxidation of the oxygen-containing gas, the reaction product is clean, the hydrogen-catalyzed reaction can effectively inhibit the occurrence of carbon deposition on the surface of the catalyst and the generation of carbon oxides, and the hydrogen-catalyzed reaction has strong bearing capacity for the fluctuation of the oxygen content of the raw material gas.

The invention provides a system for hydrogenation conversion of coal-fired flue gas CO2 into methanol under normal pressure and a catalyst preparation method. High-temperature flue gas led out from an outlet of a hearth of the coal-fired boiler is subjected to oxygen removal through the oxygen removal reactor and then returns to a boiler flue for continuous heat exchange, then the high-temperature flue gas is led out from the position between the first-stage air pre-heater and the second-stage air pre-heater and mixed with H2 according to a certain proportion to be led into the thermal catalytic reactor, CO2 and H2 are reduced into methyl alcohol through the Ni-Ga-Zr catalyst, and the methyl alcohol is recycled. And then the flue gas returns to the air pre-heater to continuously release heat, passes through a dust removal device and then is introduced into a low-temperature coal economizer, and the temperature of the flue gas is cooled to 70 DEG C or below, so that methanol is condensed. The used Ni-Ga-Zr catalyst is prepared through a coprecipitation method, and the used steps comprise stirring and dipping, adding of an alkaline solution for coprecipitation, ultrasonic aging, centrifugal washing, drying and calcining, H2 reduction and the like. According to the method, CO2 in the coal-fired flue gas can be reduced into methanol under normal pressure, a carbon capture and separation process is not needed, and the energy consumption is low.

The invention discloses a phosphating carbon film packaging structure P-Ni-C catalyst, a preparation method and application, and relates to the technical field of catalysts, the preparation method of the catalyst comprises the following steps: S1, nickel salt and terephthalic acid are subjected to a hydrothermal reaction in N, N-dimethylformamide, and a product obtained after the reaction is subjected to suction filtration, washing and drying to obtain an intermediate product; and S2, respectively placing NaH2PO2.H2O and the intermediate product in the upstream and downstream of a porcelain boat, and carrying out one-step carbonization and phosphorization to obtain the P-Ni-C catalyst. An organic ligand on the outer surface of the catalyst can form a carbon film, the catalyst based on the Ni-MOF packaging structure can prevent metal particles from clustering and gathering, the unique pore structure of the original structure can be reserved, meanwhile, the catalytic effect of the catalyst is further improved through phosphorization, and the catalytic effect of the catalyst is improved. The hydrodeoxygenation experiment in the aspect of biomass hydrothermal liquefaction is facilitated; meanwhile, the P-Ni-C catalyst has a porous structure, so that the P-Ni-C catalyst also has extremely high catalytic stability in a hydrothermal liquefaction experiment.

The utility model discloses a thermal deoxidizing device of a steam generator and an air conditioning system. The thermal deoxidizing device is installed in the steam generator. The thermal deoxidizing device comprises an outer cylinder and an inner cylinder which are coaxially nested, a gap is formed between the outer cylinder and the inner cylinder, an opening is formed in the top end of the gap in the circumferential direction, and a plurality of first through holes are formed in the inner cylinder in the circumferential direction; a multi-step baffle structure and a spiral spraying structure are arranged in the inner cylinder body from top to bottom; the inner cylinder is provided with a water inlet and an air outlet corresponding to the spiral spraying structure, and the bottom end of the inner cylinder is provided with a liquid outlet. According to the utility model, the thermal deoxidization device is arranged in the steam generator, and a heat source is provided for the thermal deoxidization device through the high-temperature steam in the steam generator, so that water which is not deoxidized in the thermal deoxidization device is heated to form deoxidized water, the oxidation corrosion speed of the steam generator is slowed down, and the heat loss is reduced.

The utility model discloses a treatment device and a hydrogen production system, and belongs to the field of hydrogen production. The treatment device is applied to the hydrogen production system and comprises deoxidation equipment, a deoxidation cooler and a gas-liquid separator which are connected in sequence, the gas inlet of the drying equipment is connected with the gas outlet of the gas-liquid separator, and the regenerated gas return port is connected to the gas inlet of the gas-liquid separator; a gas taking opening is formed in the upper part of the wall surface of the pipeline between the deoxidation cooler and the gas-liquid separator, the first end of the regenerated gas taking pipe is connected to the gas taking opening, and the second end of the regenerated gas taking pipe is connected to the regenerated gas taking opening of the drying equipment. The regeneration gas return port of the drying equipment is connected to the gas inlet of the gas-liquid separator, so that the gas-liquid separation equipment of the drying equipment is omitted, the volume of the treatment device is reduced, the size of a skid is reduced, the cost is saved, and meanwhile, gas is taken from the top of a pipeline between the deoxidation cooler and the gas-liquid separator to serve as regeneration gas; free water flowing into a regeneration gas loop is reduced, and the power consumption of drying equipment is reduced.

The present invention relates to an isophorone dimer prepared from biomass, a method for preparing same, and an alternative aviation fuel comprising same. Specifically, the present invention relates to: an isophorone dimer prepared by forming isophorone using carboxylic acid obtained from biomass and subjecting the isophorone to dimerization, hydrogenation, and deoxygenation; a method for preparing same; and an alternative aviation fuel comprising same.

This invention discloses a phosphorus-free composite polyamine boiler water treatment agent, its preparation method, and its application, belonging to the fields of chemical and water treatment technology. The water treatment agent is made from the following raw materials in parts by weight: 9-15 parts diethylenetriamine, 1-6 parts N-9-octadecene-1,3-propanediamine, 18-20 parts tannin, 1-6 parts cyclohexylamine, 10-24 parts polycarboxylic acid, and 30-60 parts deionized water. In preparation, the polycarboxylic acid is dissolved in deionized water, and N-9-octadecene-1,3-propanediamine, cyclohexylamine, diethylenetriamine, and tannin are added sequentially. After stirring at room temperature, the mixture is allowed to stand. The water treatment agent of this invention is phosphorus-free and has the functions of scale inhibition, corrosion inhibition, passivation, pre-filming, deoxygenation, desiliconization, scale dispersion and online removal of steam turbine salt deposits. It has a scale inhibition rate of ≥98%, a corrosion inhibition rate of ≤0.025mm / a and a deoxygenation efficiency of ≥97%. It can be adapted to high-pressure, subcritical and supercritical power plant boilers, is easy to prepare and suitable for industrial application.