1207 results about "Liquid ammonia" patented technology

The invention relates to the technical field of risk analysis, in particular to a dangerous chemical transportation risk prediction system and method based on big data analysis, and the system comprises a multi-dimensional data acquisition module which is used for collecting human-machine-ring-pipe four-dimensional data in the liquid ammonia water transportation process, and carrying out the standardization processing and time-space synchronization, and obtaining a multi-source heterogeneous data set; the risk level acquisition module is used for constructing a man-machine-ring-management collaborative risk assessment model and analyzing the multi-source heterogeneous data set to obtain a risk assessment result; the human-machine-environment-management collaborative risk assessment model comprises a human-machine interaction key node identification layer, a management behavior-equipment response association analysis layer, an environment-material interaction dynamic risk assessment layer and a multi-dimensional factor risk cascade assessment layer; and the emergency disposal scheme acquisition module constructs an emergency disposal scheme intelligent recommendation model to perform grading and classification analysis on the risk assessment result, generates a multi-level risk early warning and emergency disposal scheme, and optimizes the emergency disposal scheme.

The invention relates to the technical field of industrial process control, and discloses a denitration intelligent monitoring method and system based on data analysis and a storage medium. The method comprises the following steps: performing working condition identification by using an improved K-means algorithm to obtain stable operation, fire change preparation, fire change proceeding and fire change recovery modes; matching a segmented control strategy according to an identification result, and carrying out weighted fusion on feedforward and predictive control in a fire exchange preparation stage to generate a differentiated liquid ammonia regulation instruction; the disturbance feed-forward compensation amount is calculated in combination with the combustion state of the kiln, the adjusting instruction is restrained, and a liquid ammonia control instruction is obtained; the execution effect is monitored in real time through standardized deviation detection, manual intervention is switched in case of abnormity, and control parameters are fed back and updated in case of normal. The problems that NOx control lags behind and liquid ammonia consumption is not economical under the fire exchange working condition are solved, and the control precision and the self-adaptive capacity of the denitration system are improved.

The invention relates to the technical field of chemical engineering, in particular to a simple and safe ammonia residual gas recovery system which comprises a liquid ammonia storage tank (1), an accident ammonia absorption tower (2), a circulating pump set, a gas phase pipeline and a liquid phase pipeline, the circulating pump set comprises a circulating water pump, a compression pump and a waste heat recovery pump, the waste heat recovery pump is connected with a steam valve, and the liquid ammonia storage tank (1) is connected with a gasifier (11). The vaporizer (11) is connected with the buffer tank (12), the buffer tank (12) and the accident ammonia absorption tower (2) circulate pure ammonia gas through a gas phase pipeline, the accident ammonia absorption tower (2) and the liquid ammonia storage tank (1) circulate pure liquid ammonia through a liquid phase pipeline, the absorption tank (21) adsorbs exhaust gas detected by the accident ammonia absorption tower (2), and recovered nitrogen is used for purging the liquid ammonia storage tank (1), so that escape-free environment-friendly treatment and recycling of ammonia are realized.

The invention relates to the technical field of ship engine tail gas treatment, and discloses a denitration system and a denitration method for ammonia fuel engine tail gas. The denitration system comprises an ammonia fuel engine and a denitration device, the liquid ammonia fuel supply device is connected with the ammonia fuel engine through a supply pipeline and is used for supplying ammonia fuel to the ammonia fuel engine; a gas inlet of the ammonia gas buffer tank is connected with the supply pipeline, and the ammonia gas buffer tank is used for collecting unburned ammonia gas generated in the supply pipeline; the ammonia water preparation device is connected with a gas outlet of the ammonia gas buffer tank; and the tail gas denitration device is connected with an outlet of the ammonia water preparation device and an exhaust port of the ammonia fuel engine. The ammonia water is prepared from the unburned ammonia gas, and the prepared ammonia water is used for subsequent reduction of nitrogen oxides in tail gas of an ammonia fuel engine, so that the treatment problem of the unburned ammonia gas can be solved, and meanwhile, the consumption of a reducing agent is reduced. In addition, the ammonia water can replace part of the reducing agent, so that the storage amount of the reducing agent can be reduced, and the ship space occupied by the reducing agent is reduced.

The utility model relates to a system for treating tail gas produced during preparation of germane / silane in a liquid ammonia system. The system comprises an inert gas cylinder, an anti-suck-back tank and a tail gas absorption tank which are communicated through pipelines, a gas inlet of the tail gas absorption tank is communicated to a germane / silane tail gas outlet of a germane / silane synthesis device in the liquid ammonia system through an anti-suck-back tank; a top gas inlet of the anti-suck-back tank is connected to a germane / silane tail gas outlet of a germane / silane synthesis device in the liquid ammonia system, and a bottom gas outlet of the anti-suck-back tank is inserted into the bottom in the tail gas absorption tank from the top gas inlet of the tail gas absorption tank through a first pipeline; and the inert gas cylinder is connected to the gas inlet pipeline at the top of the suck-back prevention tank. The system is simple in structure, convenient to operate and high in germane / silane tail gas treatment efficiency, and can effectively prevent the suck-back of the absorption liquid and ensure that the germane / silane tail gas is discharged after reaching the standard after being treated.

A method for continuously producing m-xylylenediamine belongs to the technical field of organic synthesis and comprises the following steps: (1) mixing isophthalonitrile, toluene and liquid ammonia according to a mass ratio of 1: (3-5): (13-17) in a nitrogen atmosphere to form a reaction mixture; (2) heating the interior of a reaction bed containing a catalyst to 90-95 DEG C, continuously introducing hydrogen into the reaction bed, introducing the reaction mixture after the pressure intensity of the reaction bed is stable, and carrying out a catalytic hydrogenation reaction to generate a reaction product; and (3) carrying out gas-liquid separation on the reaction product, removing liquid ammonia from the liquid-phase product through an ammonia distillation process, and separating toluene and m-xylylenediamine through a rectification process to obtain m-xylylenediamine. According to the method, isophthalonitrile and hydrogen are used as raw materials, liquid ammonia and methylbenzene are used as reaction solvents, the raw materials and the reaction solvents are heated to 90-95 DEG C under the catalytic action of a catalyst for an exothermic reaction, m-xylylenediamine is generated through the reaction, and the reaction yield is larger than 99%.

The invention relates to a tail gas denitration system and method for an ammonia fuel ship, an ammonia supply pipeline of an ammonia fuel engine in the system adopts a double-wall pipe, the inner pipe of the double-wall pipe is used for conveying liquid ammonia, and the outer pipe of the double-wall pipe is connected with an ammonia treatment system through a fan so as to suck leaked ammonia gas to the ammonia treatment system; the ammonia treatment system is connected with the buffer tank through a fan and is used for conveying the discharged gas to the buffer tank after pressurizing the discharged gas through the fan; the ammonia treatment system is connected with a reducing agent tank through a pump; the reducing agent tank receives ammonia water of the ammonia treatment system through the pump; the SCR reducing agent supply system is connected with the reducing agent spray gun through the reducing agent tank and the buffer tank and used for conveying the discharged gas to the reducing agent spray gun through the SCR reducing agent supply system to assist in atomizing ammonia water. According to the ammonia fuel ship tail gas denitration system and method, ammonia water generated in the ammonia treatment system is used as a reducing agent of the SCR system, and discharged gas of the ammonia treatment system is used as auxiliary atomization gas of the reducing agent, so that waste is recycled, and the denitration efficiency is improved.

The invention provides a liquid ammonia in-cylinder direct injection engine combustion system and method with an active pre-combustion chamber, and relates to the technical field of internal combustion engines, the liquid ammonia in-cylinder direct injection engine combustion system comprises a cylinder cover and a cylinder sleeve arranged below the cylinder cover, the pre-combustion chamber is vertically arranged in the center of the cylinder cover, a liquid ammonia injector is arranged on one side of the pre-combustion chamber, and the active pre-combustion chamber is arranged in the cylinder sleeve. A hydrogen ejector and a spark plug are arranged on the pre-combustion chamber; and spraying holes are formed in the pre-combustion chamber and located in the bottom of the pre-combustion chamber, and the spraying holes of the pre-combustion chamber face one side of the liquid ammonia ejector. According to the liquid ammonia in-cylinder direct injection engine combustion system and method with the active pre-combustion chamber, the effect that diffusion combustion is promoted through premixed combustion of ammonia fuel is achieved, accurate control over the combustion initial point and the heat release rate is achieved, and the requirements for the low hydrogen energy ratio, high ignition efficiency and high heat efficiency of an ammonia fuel engine in the full working condition range are met.

The invention provides a preparation method of 2-pyrrolidone, which comprises the following steps: by taking gamma-butyrolactone and liquid ammonia as raw materials, premixing to generate 4-hydroxybutyramide, then removing excessive liquid ammonia, and then dehydrating the 4-hydroxybutyramide to synthesize the 2-pyrrolidone. According to the method disclosed by the invention, the 2-pyrrolidone is synthesized by firstly deaminating and then dehydrating, so that the contents of light and heavy components are effectively reduced, and the yield can reach 95% or above.

The invention provides a liquid ammonia leakage detection and spraying system based on multi-mode sensing. The system comprises a sensing module, a decision module and an execution module, the sensing module is used for collecting multi-modal data around the liquid ammonia storage device; the decision module is used for judging whether liquid ammonia leakage occurs or not according to the multi-modal data, fusing the multi-modal data through a Kalman filtering algorithm to obtain leakage parameters, and generating a dynamic spraying strategy according to the leakage parameters; and the execution module is used for spraying according to the dynamic spraying strategy. Compared with the prior art, the liquid ammonia leakage detecting and spraying system based on multi-modal sensing has the advantages that the occurrence of liquid ammonia leakage is judged by collecting multi-modal data, the dynamic spraying strategy is generated, and the multi-degree-of-freedom spraying head is controlled according to the dynamic spraying strategy to accurately spray a leakage point; therefore, the effects of accurately and efficiently inhibiting liquid ammonia leakage and saving water resources are achieved. The method has the same beneficial effects.

The present invention discloses a device and method for producing oxalamide, and relates to the field of chemical production. The method for producing oxalamide provided by the present invention specifically comprises: mixing a methanol solution of liquid ammonia and a methanol solution of dimethyl oxalate to undergo an ammonolysis reaction, flashing, filtering, and drying the first slurry after the reaction to obtain solid oxalamide, refining the liquid phase obtained by solid-liquid separation of the first slurry to obtain byproduct methanol, and washing and absorbing ammonia in the tail gas with dimethyl oxalate and returning to the reaction system. In the process of oxalamide production, the present invention utilizes dimethyl oxalate to react with ammonia in the mixed gas generated during the reaction, and the obtained product continues to undergo subsequent ammonolysis reaction, thereby improving the utilization rate of the reaction materials; at the same time, a condenser is not used to condense ammonia and methanol before separation of alcohol and ammonia, thereby saving condensation equipment and cooling water, reducing production costs, and facilitating industrial production.

The invention discloses a metal element doped MnO2 and MnFe oxide composite catalyst as well as a preparation method and application thereof, and belongs to the technical field of flue gas desulfurization and denitrification. The preparation method comprises the following steps: dissolving potassium permanganate, divalent manganese salt and doped metal salt in water for reaction to prepare metal element doped MnO2; and mixing and reacting with a template agent, ferric salt and sodium salt, drying and roasting to obtain the final catalyst. The MnO2 electronic structure is modulated by doping metal elements, and the three-dimensional porous structure of the MnFe oxide is constructed by using the template agent, so that the catalyst has efficient adsorption and strong catalytic oxidation capacity, NO and SO2 can be synergistically removed at the same time, and the catalyst has desulfurization and denitrification activity in a wide temperature range of 30-300 DEG C, and is suitable for industrial production. And liquid ammonia does not need to be used in the purification process, so that the purification agent is high in safety and is particularly suitable for purification treatment under complex flue gas conditions in the non-electric industry.

The invention relates to an all-cotton four-way stretch fabric and a preparation method thereof, and belongs to the technical field of textile dyeing and finishing. The preparation method comprises the following steps: performing singeing, enzyme desizing, liquid ammonia finishing, loose alkali shrinkage and overfeeding soft heat setting on gray fabric to obtain the all-cotton four-way stretch fabric. The warp-wise and weft-wise shrinkage rates of the prepared four-way stretch fabric are-3.0%-0%, the warp-wise elastic elongation rate is 12%-15%, the weft-wise elastic elongation rate is 12%-18%, and the elastic residual elongation rate is smaller than or equal to 8%; obvious warp and weft elasticity can be achieved without elastic fibers, the problems that elastic fabrics such as spandex core-spun yarn fabrics are complex to manufacture, unstable in fabric size and the like are solved, the warp and weft elasticity is obvious, the size stability is good, the hand feeling is soft, and the price is low; the preparation method is simple, does not need equipment transformation, is easy to operate and does not damage fiber strength.

The utility model relates to the technical field of new energy, in particular to a combined cooling heating and power system based on pure ammonia fuel. A pure ammonia fuel supply system comprises a liquid ammonia temperature adjusting device, a liquid ammonia evaporation device, an ammonia gas cracking device, a gas storage adjusting device and plasma ignition combustors, a first plasma ignition combustor is arranged in the ammonia gas cracking device, and a second plasma ignition combustor is arranged between the liquid ammonia evaporation device and a boiler. Rapid ignition and stable and continuous combustion of the pure ammonia fuel are achieved, then the working stability of an internal combustion engine generator set, a gas turbine generator set, a fuel cell and a boiler using the pure ammonia fuel is improved, meanwhile, due to the fact that the pure ammonia fuel is used, greenhouse gas emission is reduced, and the air quality is improved.

The invention relates to a solar PV / T circulating system integrating thermochemical adsorption cold storage and radiation cooling. The solar PV / T circulating system comprises loop heat pipe circulation which comprises an integrated radiation cooling PV / T assembly, a photovoltaic controller and a working medium pump. The PV / T assembly is of a turnover structure, the front face of the PV / T assembly is used for absorbing sunlight radiation, and the back face of the PV / T assembly is used for radiation heat exchange to cool the refrigerant. The vapor compression refrigeration cycle comprises a direct-current variable-frequency compressor, a condenser, a first evaporator and a plate heat exchanger; the thermochemical adsorption cold storage cycle comprises an adsorption cold storage unit, a liquid ammonia storage tank and a second evaporator; wherein an adsorbent capable of adsorbing ammonia gas and desorbing and releasing the ammonia gas is loaded in the adsorption cold storage unit. Compared with the prior art, the solar PV / T circulating system has the advantages that collaborative operation of solar photovoltaic cold supply and photo-thermal cold storage can be achieved, the solar energy utilization rate is increased, and all-weather and stable cold supply of the data center can be guaranteed.

The invention relates to the field of fuel injection systems of internal combustion engines, in particular to a liquid ammonia-hydrogen dual-fuel premixing direct injection combustion chamber which comprises a pre-combustion chamber, an injection end of the pre-combustion chamber is mounted in the combustion chamber, and a spark plug and a mixed fuel injection structure are mounted on the pre-combustion chamber. The inlet end of the mixed fuel injection structure is communicated with a liquid ammonia and hydrogen mixing structure, a hydrogen inlet is formed in the side wall of the liquid ammonia and hydrogen mixing structure, the inlet end of the liquid ammonia and hydrogen mixing structure is communicated with a liquid ammonia injection structure, an ammonia inlet is formed in the side wall of the liquid ammonia injection structure, and a valve structure is arranged in the liquid ammonia injection structure. The problems of fuel injection and ignition in the ammonia-hydrogen fusion engine are solved.

The invention relates to a high-count double-sided plaid knitted shirt fabric with stable size and a production process thereof, and belongs to the technical field of textile. The spinning mode is compact siro spinning, and the fabric comprises the following components in percentage by weight: 83-88% of cotton and 12-17% of tencel; the jacquard plaid patterns are arranged into four paths from bottom to top; the jacquard weave distribution of the needle cylinder is divided into 54 parts from bottom to top, and the dial triangle is divided into two paths; the production process sequentially comprises the steps of spinning, yarn dyeing, weaving, singeing, water washing, mercerizing, liquid ammonia treatment, water washing and tentering. The fabric is good in shrinkage permeability and good in shape retention; the fabric is compact in texture structure, the dimensional stability and mechanical strength of the fabric are improved, the overall pattern is simple and square, the dimensional stability is good, crease resistance, moisture absorption and breathability are integrated, the pattern is rich, the color fastness is high, and the fabric can resist washing modes such as hand washing and washing machine washing.

A system and method for recovering ammonia from an ammonia-fuelled engine of a vessel. The method comprises: (a) purging the engine with a purge gas to produce an ammonia-containing purge gas stream; (b) passing the ammonia-containing purge gas stream to holding tank(s) on the vessel to create a holding gas; (c) passing the holding gas into a reliquefaction system provided on the vessel to provide a liquid ammonia return stream and a reduced ammonia gaseous stream; and (d) returning the liquid ammonia return stream into a fuel tank configured to supply the engine. The purge gas may be nitrogen. The reliquefaction system may be the same reliquefaction system that the ship uses for recovering boil-off gas, BOG, from a liquefied natural gas, LNG, cargo. There is also described a vessel, such as a liquefied cargo carrier, using said method and system. The engine may be a dual-fuel engine configured to work with a second fuel.

The invention discloses a deep sea floating type ammonia production and storage system and method, and the system comprises an offshore floating type ammonia production ship which is located on the sea surface and is used for producing liquid ammonia; the wind power generation device is positioned above the sea surface and is used for supplying energy required for producing liquid ammonia to the offshore floating type ammonia production ship; the underwater flexible liquid ammonia storage device is located below the sea surface and used for storing liquid ammonia produced by the offshore floating type ammonia production ship, and the water pressure provided by the seawater depth of the installation position of the underwater flexible liquid ammonia storage device is larger than the ammonia saturated vapor pressure corresponding to the seawater temperature of the installation position; liquid ammonia produced by the offshore floating ammonia production ship is conveyed into the underwater flexible liquid ammonia storage device through a pipeline to be stored; according to the offshore floating type production ammonia storage ship containing the underwater flexible liquid storage device, the deepwater pressure and the temperature environment are fully utilized, the flexible non-metal bag is adopted as the liquid ammonia storage device, and therefore the manufacturing cost of the FPSO under the same ammonia production capacity is lower, and the liquid ammonia storage cost is reduced.

The invention provides a catalytic material, a preparation method thereof and application of the catalytic material in high-purity ethyl aliphatic amine, and belongs to the technical field of fine chemical engineering. The catalytic material provided by the invention has a porous structure, so that the specific surface area of the catalytic material can be remarkably increased, more active sites can be used for contact between reaction raw materials and a catalyst, the reaction process is accelerated, meanwhile, the retention time of the reaction raw materials on the surface of the catalyst is prolonged by the porous structure, and the conversion rate of the reaction raw materials (liquid ammonia) is further improved; active components are loaded on the surface of the AB2O4 type porous composite transition metal oxide, so that the number of active sites can be further increased, and the conversion rate of liquid ammonia is further improved. Results of the embodiment show that when the catalytic material provided by the invention is used for preparing ethyl aliphatic amine by an ethanol catalytic amination method, the conversion rate of liquid ammonia is 95% or above.

The utility model belongs to a carbonyl sulfide production device adopting an external electric heater. Comprising a sulfide raw material supply unit, and the sulfide raw material supply unit is connected with a product filling row through a light component removal rectification unit and a heavy component removal rectification unit; a light component removal rectifying tower is arranged in the light component removal rectifying unit, a heavy component removal rectifying tower is arranged in the heavy component removal rectifying unit, and external ammonia electric heating reboiler units are arranged at the inner lower parts of the light component removal rectifying tower and the heavy component removal rectifying tower; the external ammonia electric heating reboiler unit comprises rectifying tower reboilers arranged at the lower parts in the light component removal rectifying tower and the heavy component removal rectifying tower, an inlet of each rectifying tower reboiler is connected with an outlet of an external liquid ammonia electric heater through a pipeline, and an outlet of each rectifying tower reboiler is connected with an inlet of the external liquid ammonia electric heater through a pipeline; the device has the characteristics that the temperature is accurately controlled, and the thermal load of the rectifying tower is stabilized, so that the purity of a product is ensured while sulfide is separated and purified.

The invention relates to a controllable pressure-temperature-impurity material corrosion testing device based on a liquid ammonia environment. The controllable pressure-temperature-impurity material corrosion testing device comprises an impurity-containing liquid ammonia environment preparation system, a high-low pressure transmitting system, a high-low temperature constant-temperature circulating system, a corrosion reaction system, a data monitoring and collecting system and a tail gas treatment system, the corrosion test device not only can realize preparation of a liquid ammonia environment containing multi-element impurities and meet corrosion environments under different pressure and different temperature conditions, but also can meet synchronous test of a plurality of samples and a plurality of corrosion modes, so that the test capability of the test device is greatly improved.

The invention relates to a mixed injection ammonia-hydrogen engine system which comprises an ammonia-hydrogen engine. An air inlet assembly; the ammonia gas supply assembly comprises a liquid ammonia storage box, a liquid ammonia vaporizer communicated with the liquid ammonia storage box through a liquid ammonia supply pipe and an ammonia gas supply pipe, one end of the ammonia gas supply pipe is connected with the liquid ammonia vaporizer, and a first pressure regulating valve is mounted on the ammonia gas supply pipe; an ammonia injection assembly; a hydrogen injection assembly; the exhaust assembly comprises an exhaust pipe communicated with the ammonia hydrogen engine, a turbine installed on the exhaust pipe and matched with the gas compressor, and a tail gas after-treatment unit installed on the exhaust pipe and located on the downstream of the turbine. An innovative structure of integrated ammonia cracking hydrogen production, hydrogen / ammonia double-path precise injection and combustion phase coordinated regulation is achieved, ammonia-hydrogen mixed combustion is used, hydrogen comes from ammonia online cracking, the combustion defect of ammonia is overcome, and the storage and transportation problem of hydrogen energy is solved.

The present invention generally relates to a process for synthesizing neodymium-based metal-organic frameworks (Nd-PTA-MOF), comprising: dissolving 166.13 mg of neodymium nitrate hexa-hydrate in 2 ml of distilled water to form a first solution; dissolving 80 mg of pyridine-2,4,6-tri-carboxylic acid (PTA) in 5 ml of distilled water to form a second solution; mixing the first solution and the second solution in a round bottom flask with magnetic stirring while heating; adding two drops of liquid ammonia to the mixture; refluxing the mixture for 2 hours at a temperature in the range of 120-150° C.; allowing the mixture to crystallize over a period of seven days to form purple-colored Nd-PTA-MOF crystals; washing the formed Nd-PTA-MOF crystals with distilled water and acetone; and fabricating an electrode for developing a hybrid supercapacitor.

The invention relates to the technical field of ceramic materials, and discloses a nitrogen-rich Si-Zr-N precursor, a nitrogen-rich amorphous SiZrN ceramic preparation method and a nitrogen-rich Si-Zr-N. The preparation method comprises the following steps: mixing perhydropolysilazane and tetrakis (dicarboxamide) zirconium, and then carrying out low-temperature liquid ammonia crosslinking and room-temperature ammonification to obtain the nitrogen-rich Si-Zr-N precursor. According to the preparation method of the nitrogen-rich amorphous SiZrN ceramic, high-temperature ammonolysis is carried out on a nitrogen-rich Si-Zr-N precursor, and the nitrogen-rich amorphous SiZrN ceramic is obtained. According to the invention, the nitrogen content of the precursor is increased through the molecular-level structure design, so that the formation of the high-nitrogen-ratio amorphous ceramic is facilitated; the pyrolysis path can be regulated and controlled, the product structure is compact, the components are uniform, and the problem of uneven mixing or incomplete reaction in the traditional method is avoided; the precursor is high in universality, is suitable for various processing and pyrolysis modes, and has good application expansibility; the cost is controllable and the method is environment-friendly.

The invention relates to the technical field of vehicles, in particular to a hybrid power system, a vehicle and a control method.The system comprises an ammonia engine and a fuel cell; the storage and conversion assembly is used for gasifying the stored liquid ammonia into first-path gaseous ammonia and second-path gaseous ammonia; the ammonia catalytic reforming device is used for catalytically reforming the second gaseous ammonia into a first path of hydrogen and a second path of hydrogen, the first path of gaseous ammonia and the first path of hydrogen are fed into an ammonia engine, and the ammonia engine utilizes mixed gas of the first path of gaseous ammonia and the first path of hydrogen for combustion; the hydrogen purification device is used for purifying the second path of hydrogen to obtain a third path of hydrogen, the third path of hydrogen is fed into the fuel cell, and the fuel cell utilizes the third path of hydrogen for combustion. Therefore, the problems that the ammonia engine and the hydrogen-oxygen fuel cell are difficult to be directly integrated together to be applied to the hybrid power system, the energy utilization efficiency is not high when the ammonia engine and the hydrogen-oxygen fuel cell are cooperatively applied to the same hybrid power system, and the working point of the engine cannot be effectively controlled in the prior art are solved.

The invention discloses a vehicle-mounted ammonia hydrogen production system, belongs to the technical field of vehicle-mounted ammonia hydrogen production, and solves the technical problems that the existing vehicle-mounted ammonia hydrogen production method cannot fully recycle high-pressure ammonia energy and cannot use air energy. The system comprises a liquid ammonia tank, an ammonia hydrogen production heat exchange catalytic reactor, an engine and a controller, the liquid ammonia tank is connected with the ammonia hydrogen production heat exchange catalytic reactor through an ammonia gas pipe, the engine is connected with the ammonia hydrogen production heat exchange catalytic reactor through an exhaust pipe, and the ammonia gas pipe is sequentially provided with a control valve, a first heat exchanger, a turbine generator, a large-area heat exchanger and a second heat exchanger. The turbine generator is electrically connected with the vehicle-mounted storage battery, the large-area heat exchanger is connected with a variable-frequency air blower through an air pipe, the engine is connected with the first heat exchanger through a cooling water pipe, and the ammonia hydrogen production heat exchange catalytic reactor is connected with the second heat exchanger through a nitrogen hydrogen pipe. High-pressure ammonia gas energy and air energy can be fully recycled and used through the turbine generator and the large-area heat exchanger.

The invention discloses hydrogen production equipment and a hydrogen production method based on sodium-catalyzed ammonia cracking, and the hydrogen production equipment comprises a reactor which is a pressure-bearing shell and tube type heat exchange reactor and is internally provided with a plurality of heat exchange tubes filled with a sodium-based catalyst, two ends of the reactor are sealed through a first sealing cover and a second sealing cover, and the first sealing cover is connected with an ammonia storage tank; the second sealing cover is connected with a gas purification separator; the ammonia storage tank is used for storing liquid ammonia and supplying ammonia to the reactor through the booster pump; the gas purification separator is used for separating unreacted ammonia, nitrogen and hydrogen from emissions of the reactor; the temperature control system controls the reaction temperature by adjusting the flow of the heat source gas entering the reactor. A sodium-based catalyst is adopted, and in-situ regeneration of the catalyst is realized through a dynamic circular reaction mechanism; sodium serves as an intermediate medium and is continuously consumed and regenerated in the ammonia cracking process, external supplementation is not needed, the reaction path specificity is high, the byproduct generation rate is low, and the heat transfer efficiency is improved through the design of the countercurrent shell and tube type heat exchange reactor.

The utility model discloses a gas turbine system based on ammonia catalytic cracking. The gas turbine system comprises a liquid ammonia assembly, a cracking assembly, a liquid ammonia combustion assembly, a heat exchange component and a gas turbine, the cracking assembly is used for pressurizing and cracking part of liquid ammonia provided by the liquid ammonia assembly to generate cracking gas; the liquid ammonia combustion assembly comprises a gasification part and a combustion part which are connected with the liquid ammonia assembly, the gasification part is used for gasifying the other part of liquid ammonia provided by the liquid ammonia assembly, and the combustion part is used for combusting ammonia gas generated by the gasification part so as to provide required heat for the cracking assembly; the heat exchange part and the gas turbine are sequentially connected with the cracking assembly, the heat exchange part is used for cooling cracking gas, and the cooled cracking gas is conveyed into the gas turbine for combustion; smoke exhausted by the combustion component and the gas turbine provides heat needed by the gasification component. Pyrolysis gas generated by pure ammonia catalytic cracking can be used as fuel, the combustion effect is improved, and the energy utilization efficiency is improved.

The invention belongs to the technical field of synthesis of food additive cooling agent intermediates, and particularly relates to a method for efficiently preparing 2, 2-diisopropyl propionitrile. According to the method, the solubility of sodium amide is promoted through the complexing action of the nitrogen-containing organic solvent in the reaction process, the reaction rate is increased, the situation that ultralow-temperature conditions and pressure-resistant equipment need to be used in the reaction process is avoided, and the operation difficulty of the reaction is reduced. The technical scheme provided by the invention simultaneously has the advantages of a liquid ammonia method and a solvent method in the prior art, the production energy consumption is reduced, the reaction rate is accelerated, and the production safety coefficient is improved. The industrial production is favorably realized.