545 results about "Methanol water" patented technology

To provide a system, a method, and an application for carbon recovery system for compact type vessel based on connection between methanol reforming and high-efficiency membrane separation.SOLUTION: Propulsive power is supplied to a vessel by using a methanol aqueous solution as a raw material through steps such as reforming, separation of a reformate product, and hydrogen combustion, hydrogen fuel is manufactured through methanol steam reforming, anxiety about safety of high pressure hydrogen storage in a prior art is eliminated, efficient carbon recovery is carried out by storing separated carbon dioxide by compression and liquefying, heat is supplied for methanol steam reforming and preheating of the fuel by using excess heat of discharged flue gas, and comprehensive use of energy is achieved. Use of hydrogen energy is realized by a vessel without requiring storage and transportation of hydrogen, and a shipping industry contributes to green, low carbon, and sustainable development.SELECTED DRAWING: Figure 1

The invention provides a PVDF (Polyvinylidene Fluoride) nanofiltration membrane constructed on the basis of microwave-enhanced bridging interfacial polymerization as well as a preparation method and application of the PVDF nanofiltration membrane. The method comprises the following steps: reacting PVDF powder with an organic alkali to prepare a modified film-forming solution, blade-coating the modified film-forming solution on a non-woven fabric supporting layer, placing the non-woven fabric supporting layer in an ethanol-water or methanol-water coagulating bath, and preparing a PVDF supporting film by virtue of assistance of an ice template; weighing the functionalized nano material and an amino silane coupling agent, performing ultrasonic dispersion, and adding a catalyst for reaction to obtain dispersion liquid; immersing a PVDF support membrane into the dispersion liquid to obtain a modified membrane; immersing the modified membrane into an aqueous solution containing an amine monomer and an organic solution containing an acyl chloride monomer, and carrying out microwave radiation. The interface reaction rate and selectivity are enhanced through the microwave excitation effect, and meanwhile, the hydrophilicity and reaction activity of the PVDF base membrane are cooperatively regulated and controlled, so that the separation efficiency and the anti-pollution capacity of the membrane are remarkably improved. The obtained PVDF nanofiltration membrane has high flux, high selectivity and excellent structural stability, and is suitable for efficient purification and resource recovery application in a complex water system.

The present application relates to hydrogen production technology field, especially to a kind of methanol hydrogen production method, comprising the following steps: S10: methanol water is heated and vaporized to obtain methanol water vapor;S20: methanol reforming reaction obtains hydrogen mixture gas;S30: after cooling treatment to hydrogen mixture gas, through water washing tower absorption unreacted methanol water, then, adjust the relative humidity and temperature of hydrogen mixture gas;S40: hydrogen mixture gas is input into carbon dioxide absorption tower to remove carbon dioxide;S50: after removing carbon dioxide, product hydrogen is obtained and input hydrogen tank storage to supply user end.The above-mentioned methanol hydrogen production method, by methanol water vapor reforming hydrogen treatment, obtains hydrogen mixture gas.Again, hydrogen mixture gas is purified to obtain product hydrogen with very low carbon monoxide content, with raw material easy to transport, the hydrogen purity of output is high, equipment construction cost is low, and energy consumption is low and the like advantages, reach the purpose of expanding hydrogen application range.

The present invention provides a method for constructing a fingerprint of a Xin Su Ning capsule and a fingerprint. The method includes: S1: taking contents of Xin Su Ning capsules of different batches, adding a methanol aqueous solution, and performing ultrasonic extraction to obtain test article solutions; S2: injecting the test article solutions into a high performance liquid chromatograph, performing gradient elution, performing chromatographic analysis, and recording chromatograms from 0 to 140 min; S3: importing the chromatograms into a traditional Chinese medicine chromatographic fingerprint similarity evaluation system to obtain a fingerprint; and S4: performing mass spectral analysis on the test article solutions, and determining chemical constituents of chromatographic peaks in the fingerprint according to results of the mass spectral analysis. The method for constructing a fingerprint of a Xin Su Ning capsule provided in the present invention has advantages of simple, stable and high precision and good reproducibility.

The invention relates to a detection method for determining isotope abundance of a 15N or 18O labeled nitrate sample by using an organic mass spectrum. The detection method comprises the following steps: (1) dissolving the 15N or 18O labeled nitrate sample in a methanol aqueous solution; (2) taking the supernatant, filtering with a filter membrane, and diluting with a methanol aqueous solution to obtain a solution to be detected; and (3) detecting the solution to be detected by using a high-resolution liquid chromatograph-mass spectrometer, selecting a mass spectrum in a peak appearance time window, recording relative mass spectrum signal intensities with mass-to-charge ratios of 61.988 and 62.985, and calculating to obtain the 15N isotope abundance. Or recording the relative mass spectrum signal intensities with the mass-to-charge ratios of 61.988, 63.993, 65.997 and 68.001, and calculating to obtain the abundance of the < 18 > O isotope. Compared with the prior art, the method has the advantages that the sample pretreatment time is greatly shortened, the economic cost is low, and the test result is accurate.

The invention discloses a method for detecting the contents of VMA, HVA and 5-HIAA in urine by using liquid chromatography-tandem mass spectrometry. The method comprises the following steps: S1, removing VMA, HVA and 5-HIAA in urine to obtain a blank urine matrix; s2, weighing VMA, HVA and 5-HIAA solid powder, fixing the volume with methanol, mixing the dissolved liquids, diluting with methanol-water to obtain a VMA, HVA and 5-HIAA working solution, and finally diluting step by step with a blank urine matrix to obtain a calibration product; s3, respectively taking a urine sample to be detected, the calibration substance and the quality control substance, adding the mixed internal standard working solution of VMA, HVA and 5-HIAA isotopes, uniformly mixing, centrifuging, and taking supernate; s4, separating the supernate by using liquid chromatography; s5, the separated supernate enters a mass spectrum to be detected, and the content of VMA, HVA and 5-HIAA in the urine sample to be detected is obtained. The detection method disclosed by the invention is simple and rapid in pretreatment, high in specificity, low in reagent consumption cost, free of environmental pollution, small in required sample size, easy in high-throughput operation and suitable for being developed into a kit for conventional clinical detection.

The invention relates to a methanol internal combustion engine high-temperature fuel cell hybrid power system based on double-path waste heat gradient utilization. The invention relates to the technical field of internal combustion engine waste heat recovery and new energy power system integration. The system comprises a fuel tank, a first pump body, a heat exchanger, a methanol internal combustion engine, a turbine, a gas compressor, an air compressor, a reformer, a high-temperature proton exchange membrane fuel cell, an evaporator and a second pump body. A methanol-water vapor mixture generated by heat exchange of a mixed solution of methanol and water and a high-temperature fuel cell stack coolant in a heat exchanger is introduced into a reforming reactor and is subjected to catalytic reforming to produce hydrogen by utilizing waste heat of high-temperature tail gas of an engine, and the produced hydrogen is directly supplied to an anode of a high-temperature fuel cell. Through a double-path methanol distribution strategy, collaborative design of internal combustion engine waste heat recovery, electric pile heat management and reforming hydrogen production is realized, and the comprehensive energy efficiency of the system is improved.

The invention discloses a combined phenol-primary polyamidoamine phenol-amine resin nonionic demulsifier and a preparation method thereof.The preparation method comprises the steps that phenol M and primary polyamidoamine are mixed, a formaldehyde solution is dropwise added, a reaction product is diluted with methyl alcohol, and phenol M-primary polyamidoamine resin slurry is obtained; the preparation method comprises the following steps: mixing organic phenol N and formaldehyde, reacting under the catalysis of sodium hydroxide, and diluting a product with methanol to obtain phenol N phenolic resin slurry; dropwise adding the phenol N phenolic resin slurry into the phenol M-primary polyamidoamine resin slurry, reacting, refluxing to remove methanol and water to obtain combined phenol-primary polyamidoamine resin, and polymerizing the combined phenol (M-N)-primary polyamidoamine resin with epoxypropane and ethylene oxide in sequence under the catalysis of alkali metal hydroxide to generate R-PO-EO diblock demulsifier polyether. And cross-linking with a cross-linking agent to obtain the finished demulsifier. The demulsifier prepared by the invention has the characteristics of high dehydration speed and high final dehydration rate for thick oil emulsion in the Bohai Sea region, and especially can effectively reduce an emulsion layer of output crude oil for thick oil output liquid in a high-water-content exploitation period.

The utility model discloses a methanol aqueous solution heat pump rectification system which comprises a first-stage preheater, a second-stage preheater, a third-stage preheater, a rectification tower, a compressor, an evaporator, a condensate water tank, a stripping tower, a reboiler, a first pump, a second pump and a third pump. According to the utility model, the methanol in the methanol aqueous solution can be extracted with high purity in a rectification manner, the treated wastewater can be directly discharged after reaching the discharge standard, the heat pump system reduces the consumption of steam and circulating water, and compared with the traditional process, the energy consumption is reduced, and the operation cost is saved.

The invention discloses a preparation method of a CuPt-CSTO nano composite material, which comprises the following steps: preparing a Cr-doped SrTiO3 material CSTO by using Sr (NO3) 2, TiO2, Cr (NO3) 3 and KOH as raw materials and deionized water as a solvent through a solvothermal method; cuCl2, H2PtCl6. 6H2O and CSTO are used as raw materials, a methanol aqueous solution is used as a solvent, a two-step photodeposition method is adopted to prepare the CuPt-CSTO nanocomposite hydrogen production photocatalyst, and the CuPt-CSTO nanocomposite hydrogen production photocatalyst has the advantages of being high in visible light response capacity, tight in interface bonding, stable in structure, rich in oxidation reduction active sites and high in reduction potential and hydrogen production activity and can be applied to solar energy and photocatalytic hydrogen production.

The invention relates to the technical field of hydrogen production catalysts, in particular to a preparation method of a supported methanol steam reforming hydrogen production catalyst. Comprising the following steps: S1, dissolving copper salt, adding indium oxide, heating in a water bath to evaporate water, drying, and carbonizing to obtain a Cu / In2O3 catalyst; s2, adding the Cu / In2O3 catalyst and tris (hydroxymethyl) aminomethane into water, then adding dopamine hydrochloride for reaction, and performing centrifugal washing and drying to obtain a precipitate; and S3, grinding and carbonizing the precipitate to obtain the nitrogen-doped carbon modified Cu / In2O3 catalyst. After the surface of the Cu / In2O3 catalyst is modified by carbon, strong electron interaction exists between carbon and metal copper, metal Cu electrons are promoted to be transferred to nitrogen-doped carbon, and the formed Cu < + > species enhance the catalytic activity for catalyzing methanol steam reforming hydrogen production and the selectivity for hydrogen.

The invention is suitable for the technical field of fuel cells, and provides a methanol reforming fuel cell rapid cold start system and a control method, the system comprises: a methanol reforming hydrogen production reactor, the methanol reforming hydrogen production reactor comprises a combustion chamber, a reforming chamber and a heat exchanger, and the combustion chamber is provided with an electrical bar; the high-temperature proton exchange membrane fuel cell is connected with the methanol reforming hydrogen production reactor, and an electric heating sheet is arranged on the high-temperature proton exchange membrane fuel cell; the air pump is connected with the reforming chamber and is used for introducing air to promote the reduction-state catalyst in the reforming chamber to perform oxidation exothermic reaction; a methanol water storage tank; and the control module is used for regulating and controlling the quantity of fuel entering the methanol reforming hydrogen production reactor module, air entering the methanol reforming hydrogen production reactor module and the high-temperature proton exchange membrane fuel cell module and controlling the starting of the electric heating bar and the electric heating sheet. According to the invention, the starting time of the methanol reforming fuel cell system within hectowatt level can be shortened to be within 10min, so that the system can quickly enter a power generation state.

The invention belongs to the technical field of fuel cells, and particularly relates to a high-temperature methanol reforming fuel cell system for realizing carbon cycle and an operation process. The system comprises an electric pile, a methanol steam reforming hydrogen production reactor, a carbon dioxide hydrogenation methanol production reactor and an electrolyzed water module, hydrogen prepared by the methanol steam reforming hydrogen production reactor enters an anode of the galvanic pile through a pipeline, a cathode of the galvanic pile is supplied by an air pump, and the hydrogen and oxygen are subjected to electrochemical reaction in the galvanic pile to realize external power supply; liquid water recovered from the electric pile tail gas is introduced into the water electrolysis module, and water electrolysis is performed to generate hydrogen; carbon dioxide in the stack tail gas and hydrogen generated by the water electrolysis module enter the carbon dioxide hydrogenation methanol preparation reactor through the gas inlet pipeline to prepare methanol. According to the invention, the circulation of carbon in the high-temperature methanol fuel cell system is realized, the emission of carbon dioxide is reduced, the circulation of hydrogen and oxygen is realized, and the energy utilization efficiency of the system is jointly improved through the circulation of carbon, hydrogen and oxygen.

A methanol-water glycol heat exchange system for a methanol fuel ultra-large oil tanker is characterized in that a methanol-water glycol heat exchanger is sequentially connected with a cooling water-water glycol heat exchanger and a water glycol circulating pump through pipelines and then returns to the methanol-water glycol heat exchanger; cabin cooling water enters the cooling water-water glycol heat exchanger through the cooling water inlet and then returns to the cabin through the cooling water outlet, and the cooling water-water glycol heat exchanger and the cabin cooling water outlet are located on the same layer of platform in the cabin. The methanol-water glycol heat exchanger and a pipeline connected with the methanol-water glycol heat exchanger are arranged on a deck, and other devices are all located in a cabin. According to the methanol supply unit skid, a cabin cooling water booster pump does not need to be arranged, the cost is reduced, the medium conveyed to the main deck is water glycol instead of cabin cooling water, the operation stability is improved, and the size of the methanol supply unit skid is greatly reduced.

The utility model relates to a reactor for testing the performance of a methanol reforming catalyst, which comprises a reactor shell, a methanol steam inlet is arranged at the head end of the reactor shell, a reforming gas outlet is arranged at the tail end of the reactor shell, and a plurality of heating devices are sleeved outside the reactor shell side by side. A temperature sensor for monitoring the temperature of different positions in the methanol reactor tube is arranged between every two adjacent heating devices, and a plurality of reforming catalysts with the length matched with that of the heating devices are arranged in the reactor shell. According to the utility model, different section positions of the reforming reactor are heated to different temperatures through the heating devices which are arranged in a sectional manner, and the temperature state is fed back in real time through the temperature sensors at the front end and the rear end of each section position, so that high-precision temperature control in the reforming reactor is realized. On the basis, reforming catalysts with different lengths, different types and different reaction temperature intervals can be arranged, and the quality of hydrogen in reformed gas discharged from the tail end is detected.

The invention discloses a photovoltaic and thermochemical coupled full-spectrum solar hydrogen production system. The system comprises a concentrating and frequency dividing subsystem, a photovoltaic electrolysis subsystem and a photo-thermal methanol reforming subsystem, the light condensation and frequency division subsystem is used for carrying out focusing and frequency division on the incident full-spectrum sunlight, and then the full-spectrum sunlight enters the photovoltaic electrolysis subsystem and the photo-thermal methanol reforming subsystem; the waveband sunlight matched with the photovoltaic band gap is focused and incident into the photovoltaic electrolysis subsystem to be converted into electric energy, and then water electrolysis for hydrogen production is driven; and the sunlight of the rest wave band is focused and incident to the photo-thermal methanol cracking subsystem to be converted into heat energy, so that the methanol / water reaction solution is driven to perform methanol reforming thermal chemical reaction for hydrogen production. And the photovoltaic electrolysis subsystem is connected with the photo-thermal methanol reforming subsystem, and is used for recycling waste heat generated in the photovoltaic power generation process for preheating a reaction solution and cooling a photovoltaic device at the same time. According to the invention, efficient conversion from full-spectrum solar energy to hydrogen energy is realized.

The invention discloses a mobile standby power generation system based on a methanol-to-hydrogen fuel cell system and a control method thereof. The technical problems that a combustion heating system needs to be arranged for existing methanol hydrogen production, the structure is complex, the risk is high, and energy supply cannot be adapted to an outdoor mobile power generation scene are mainly solved. The system comprises a methanol material tank, a pure water material tank, an evaporator, a gasification superheater, a methanol water reforming reactor, an air cooler, a gas-liquid separator, a PSA (Pressure Swing Adsorption) tower for separating desorbed gas and pure hydrogen, a methanol part catalytic oxidation reactor and a hydrogen fuel electric pile taking hydrogen output by the PSA tower as a material source, wherein the evaporator, the gasification superheater, the methanol water reforming reactor, the air cooler and the gas-liquid separator are sequentially connected to the downstream of a mixing tank; the inverter and the storage battery pack are electrically connected with the hydrogen fuel electric pile in sequence; a first heat exchanger is arranged in a pipeline between the mixing tank and the evaporator, and a second heat exchanger is arranged in a pipeline between the evaporator and the gasification superheater. The power generation system has the advantages of high heat recovery efficiency, high raw material utilization rate, low system energy consumption and the like.

The invention relates to the technical field of hydrogen energy, in particular to a methanol reforming hydrogen production system and a control method thereof.The system comprises a methanol-water mixing module, a fused salt phase change energy storage module, a reforming reaction module and a post-treatment module which are sequentially communicated; the fused salt phase change energy storage module comprises a phase change energy storage fused salt reactor as well as a heat release device I and a heat release device II which are arranged in the fused salt reactor, the output end of the methanol-water mixing module is connected with the heat release device I, and the output end of the heat release device I is connected with the reforming reaction module; the reforming reaction module comprises a reforming reactor with a built-in axial heating tube bundle, a catalytic reaction cavity is formed between tubes of the axial heating tube bundle, an in-tube channel of the axial heating tube bundle and the second heat release device form a circulation loop, and a heat transfer working medium is arranged in the circulation loop. By combining phase change energy storage and an efficient heating working medium circulation loop, the problem that the temperature of a catalyst is not constant in a traditional hydrogen production process is solved, and the reaction efficiency, the hydrogen yield and the hydrogen purity of the system are fundamentally improved.

The utility model discloses a methanol reforming and electrolyzed water complementary hydrogen production system capable of balancing wind-solar power fluctuation, which relates to the technical field of hydrogen production and comprises a water tank, the water tank is connected with electrolytic bath hydrogen production equipment through a first pipeline, and a first proportional valve and a first flowmeter are arranged on the first pipeline; the methanol fuel tank is connected with the methanol steam reforming hydrogen production equipment through a second pipeline, and a second proportional valve and a second flow meter are arranged on the second pipeline; the two ends of the third pipeline are connected with the first pipeline and the second pipeline respectively, and a third proportional valve, a third flow meter and a first one-way valve are arranged on the third pipeline; and a hydrogen storage tank. According to the methanol reforming and electrolyzed water complementary hydrogen production system capable of balancing the wind-light power fluctuation, the electrolytic bath hydrogen production equipment and the methanol steam reforming hydrogen production equipment are intelligently controlled to work cooperatively according to the input wind-light power fluctuation, so that the stable hydrogen output quantity is ensured.

The invention discloses a noble metal-based catalyst as well as a preparation method and application thereof, and belongs to the technical field of methanol steam reforming hydrogen production and catalysts. The noble metal-based catalyst comprises a carrier, an auxiliary agent metal and an active metal, the carrier comprises CeO2, and the shape of the carrier is in a rod shape; the active metal comprises Pt; the auxiliary agent metal comprises In2O3; the active sites of the noble metal-based catalyst comprise Pt < 2 + > and Pt < delta + >, the Pt < 2 + > is higher than 85%, and the Pt < delta + > is lower than 15%. According to the invention, the ratio of CO in the product is effectively reduced.

The invention provides a method for detecting environmental pollutants by using a dispersive liquid-liquid microextraction technology. The method is particularly suitable for detecting endocrine disrupters in a urine sample. According to the method, a proper amount of a NaCl solution, a dispersing agent acetonitrile and an extracting agent trichloromethane are added into a urine sample, and target pollutants are rapidly extracted; and after centrifugation and nitrogen blowing drying, redissolving by using a methanol-water mixed solution in a ratio of 1: 1, and finally detecting and quantitatively analyzing through UHPLC (Ultra High Performance Liquid Chromatography). Compared with liquid-liquid extraction and solid-phase extraction, the method has the characteristics of simplicity and convenience in operation, high extraction efficiency and high detection sensitivity, is suitable for detecting bisphenol compounds in various matrixes, conforms to the green chemistry principle, and reduces the use amount of organic solvents. The method can be widely applied to detection and analysis of trace pollutants in environmental samples, and provides reliable technical support for environmental monitoring and pollutant risk assessment.

The utility model discloses a spiral tube nest type methanol reforming hydrogen production device. The device comprises a gasification chamber, a combustion chamber, a reforming chamber and a heat exchange chamber which are highly integrated. Due to the fact that the performance of the reforming device is closely related to the heat utilization rate, a spiral reforming flow channel and a tubular combustion flow channel are designed; a methanol solution and electric pile anode tail gas are directly used as a combustion chamber supply source, and heat energy of a combustion chamber and a catalyst of a reforming chamber are used for heat exchange; and the gasified methanol aqueous solution is used as a supply source of a reforming chamber to complete hydrogen production. The device has the advantages of small size and light weight, and can meet the requirement of hydrogen production by using the methanol aqueous solution in the high-temperature chamber. The methanol conversion rate can be improved, the CO concentration can be reduced, and the hydrogen quality can be improved.

The invention relates to a modular methanol reforming hydrogen production system, and belongs to the technical field of new energy of methanol reforming hydrogen production. The hydrogen production system comprises a control system, an air inlet module, a methanol supply module, a plurality of methanol reforming hydrogen production modules, a reformed gas main pipeline and a tail gas main pipeline, wherein the methanol reforming hydrogen production module comprises a methanol reformer, a tail gas heat exchanger, a methanol evaporator, a methanol aqueous solution sub-feeding pump, a methanol aqueous solution sub-pipeline, a reformed gas sub-pipeline and a tail gas sub-pipeline; the methanol reformer comprises a vaporizing chamber, an oxidizing chamber and a reforming chamber; an outlet of high-temperature tail gas generated by the oxidizing chamber is connected with the tail gas heat exchanger and the methanol evaporator; and the methanol aqueous solution main storage tank is sequentially connected with the methanol evaporator, the tail gas heat exchanger and the reforming chamber through a methanol aqueous solution feeding pump. The methanol reforming hydrogen production system adopts a modular design, is simple in equipment, high in expansibility, quick to start and adjustable in hydrogen production amount, and realizes instant production and instant use of hydrogen energy and hydrogen.

The invention discloses a sialic acid molecular imprinting extraction method, and belongs to the technical field of separation and purification. The invention discloses a sialic acid molecular imprinting extraction method which comprises the following steps: dissolving a sialic acid standard substance and a functional monomer in a binary pore-foaming agent-ionic liquid, adding a cross-linking agent and an initiator, polymerizing under ultraviolet light to prepare a high-molecular polymer, and washing off the sialic acid standard substance to prepare a molecular imprinting polymer; specifically adsorbing sialic acid in the fermentation liquor by using the molecularly imprinted polymer; performing graded elution on sialic acid by using a methanol-water mixed solution and a methanol-acetic acid mixed solution; and performing rotary evaporation concentration, anti-solvent crystallization, separation and drying on the bird's nest acid eluent. Tests show that the sialic acid purity is greater than or equal to 99%, and can meet the requirements of the sialic acid in the fields of food, health care, medicine, cosmetics and the like. According to the method, sialic acid can be efficiently separated and extracted from sialic acid fermentation liquor, the product yield is increased, the extraction procedures are reduced, and the production cost and the discharge amount of three wastes are reduced.

The invention discloses a mobile phase suitable for simultaneous detection of ambroxol hydrochloride and / or clenbuterol hydrochloride by high performance liquid chromatography. The mobile phase is a mixed solution composed of sodium sulfosuccinate dioctyl ester methanol, water and acetic acid, wherein the mass fraction of the sodium sulfosuccinate dioctyl ester methanol is 0.3%-0.8%; the volume ratio of the sodium sulfosuccinate dioctyl ester methanol with the mass fraction of 0.3%-0.8% to the water to the acetic acid is (740-760): (240-260): 10; the pH value of the mixed solution is 2.8 to 3.2. According to the present invention, the mobile phase is combined with the high performance liquid chromatography to detect the ambroxol hydrochloride oral solution, such that the ambroxol hydrochloride and the clenbuterol hydrochloride can be simultaneously detected, the ambroxol hydrochloride and the clenbuterol hydrochloride can be effectively separated from other impurity peaks, the peak appearance time of the ambroxol hydrochloride can be significantly reduced, and the service life of the chromatographic column can be effectively prolonged.

The acid removal system comprises a shift gas washing tower, a medium-pressure flash tower, a CO2 desorption tower, an H2S concentration tower, an N2 gas stripping tower, a thermal regeneration tower, a methanol-water separation tower and a tail gas washing tower which are sequentially communicated through a first pipeline, the lower end of the shift gas washing tower is communicated with a shift gas pipe which is communicated with the top of the medium-pressure flash tower through a second pipeline, and the top of the shift gas washing tower is communicated with a PSA hydrogen production device through a third pipeline; the CO2 desorption tower is sequentially communicated with the compressor and the urea production part through a fourth pipeline; the comprehensive automation level of the acid removal device can be improved, and the operation labor intensity is reduced; the operation stability of the acid removal device is improved, and the standard deviation of each key process parameter is reduced.

The invention relates to the technical field of radiation refrigeration films, and discloses a porous polyvinylidene fluoride based composite radiation refrigeration film and a preparation method thereof. The method comprises the following steps: firstly, carrying out melt blending on PVDF, NaCl and ZnO nanoparticles and forming a film, then dissolving out NaCl through water washing, and constructing a continuous three-dimensional porous structure in a PVDF matrix; and immersing the obtained porous PVDF / ZnO membrane material into a methanol aqueous solution containing 2-methylimidazole, so that ZnO is subjected to a coordination reaction at the pore wall and is converted into the ZIF-8 nanocrystal in situ. In the thin film prepared by the steps, the micron-sized salt-induced pore structure, the nano-sized ZIF-8 particles and the interface of the ZIF-8 particles jointly form a multi-stage scattering network, so that the scattering ability of the thin film in the solar spectrum range of 0.25-2.5 microns can be remarkably enhanced, the high infrared emission performance of the PVDF matrix in an atmospheric window of 8-13 microns is maintained, and the thin film has high solar reflectivity and high infrared emissivity, and can be used for preparing the solar film. An excellent radiation refrigeration effect can be achieved, and the heat-dissipating material is suitable for being applied to building outer surfaces, equipment heat dissipation, individual heat management and the like.

The invention belongs to the technical field of methanol hydrogen production, and discloses a process for catalytic heating coupling methanol hydrogen production. The process comprises the following steps: S1, providing a methanol cracking hydrogen production system; and S2, carrying out methanol steam reforming hydrogen production treatment based on a methanol cracking hydrogen production system. And S3, carrying out pressure swing adsorption treatment on the methanol decomposition gas prepared in S2 to obtain desorbed gas and purified hydrogen. S4, purified hydrogen flows through a product gas buffer tank with a filter element and then is fed into a gas using section. And S5, feeding the desorbed gas into a catalytic oxidation reactor for recovery treatment, and supplying released heat energy to a methanol cracking hydrogen production system for use. According to the invention, the organic combination of catalytic oxidation and methanol cracking hydrogen production is realized, the problems that the existing methanol hydrogen production process needs to discharge combustible tail gas and is unsafe and not environment-friendly are solved, extra fuel is not needed in the whole hydrogen production process, and only methanol needs to be provided; the method has the remarkable advantage of zero consumption of natural gas, diesel oil, coal and other fuels.

The utility model provides a reformer device for hydrogen production by reforming methanol water. The reformer device for hydrogen production through methanol water reforming comprises a reaction cylinder, a ceramic heating ring used for heating is installed on the surface of the reaction cylinder, a spiral stainless steel heating pipe used for preheating methanol is wound on the surface of the ceramic heating ring, and the bottom end of the stainless steel heating pipe is connected with the interior of the reaction cylinder; a heat insulation plate is mounted at the top end of the reaction cylinder, and a spiral condensation copper pipe is mounted in the heat insulation plate; a zeolite layer for uniformly vaporizing a methanol aqueous solution is arranged at the bottom end of the reaction cylinder, a separation net is arranged between the zeolite layer and the catalyst layer, and the separation net and the catalyst layer are positioned in the reaction cylinder. The methanol water reforming hydrogen production reformer device provided by the utility model has the advantages of small equipment volume, full utilization of heat and uniform vaporization of a methanol water solution.

The invention discloses a method for detecting semeglutide in food, which comprises the following steps: S1, adding a to-be-detected food sample into methanol or a methanol aqueous solution, mixing, and sequentially carrying out homogenization, ultrasonic extraction and filtration to obtain an extracting solution; s2, carrying out liquid chromatography and tandem mass spectrometry analysis on the extracting solution; wherein the elution mode of the liquid chromatography is gradient elution. According to the method, the semeglutide in the to-be-detected food sample can be effectively extracted by adopting homogeneous extraction and ultrasonic extraction of the methanol aqueous solution, then the extracting solution is analyzed by adopting the liquid chromatography tandem mass spectrometer, and the used detection method has the advantages of being high in separation capacity, simple in operation process, wide in applicability and short in analysis time. By utilizing the method disclosed by the invention, qualitative and quantitative analysis of the semeglutide in the food can be quickly and accurately carried out, the liquid phase analysis accuracy is high, the repeatability is good, trace detection of the semeglutide in the food can be realized, and the detection limit is less than or equal to 1.5 mu g / kg.