208results about "Gas-gas reaction processes" patented technology

The invention discloses a three-dimensional self-driven underwater air flow control system, and relates to the technical field of underwater air flow control, and the underwater air flow control system provided by the invention can realize transmission and control of trace gas at a microscopic level, so that new functions and applications which cannot be realized by some traditional liquid microfluids can be realized. Aiming at the defects of a two-dimensional airflow control system, the invention provides a new strategy for constructing a three-dimensional self-driven underwater airflow control system by using Laplace pressure difference in bubbles in combination with a Chinese traditional weaving technology and a super-hydrophobic metal wire. The two ends of the super-hydrophobic metal wires are curled into disc shapes with different sizes by utilizing a Chinese traditional weaving technology, and when the formed framework is immersed into water, the disc structures and the connecting metal wires are wrapped by a layer of retained air, so that a communicated airflow control system is formed.

The utility model belongs to the technical field of preparation of carbon nanotubes, and particularly relates to a tubular heating furnace for preparing carbon nanotubes. The utility model provides a tubular heating furnace for preparing carbon nanotubes. The tubular heating furnace comprises a furnace tube and a heat insulator arranged on the periphery of the furnace tube, one end of the furnace tube is a feeding end, and the other end is a discharging end; a gap is formed between the heat insulator and the outer wall of the furnace tube and is divided into a plurality of heating cavities arranged in the length direction of the furnace tube, so that a plurality of temperature zones are correspondingly formed in the space in the furnace tube; and a heating element and a temperature detection element are arranged in the heating cavity. A plurality of air inlet pipelines are led out of the side wall of the furnace tube in the length direction of the furnace tube, and each air inlet pipeline is communicated with the interior of the furnace tube. Raw material gas is supplied through a multi-point gas inlet pipeline, the utilization rate of a carbon source can be increased, the agglomeration time of catalyst particles can be shortened, and therefore the yield of the single-walled carbon nanotubes is increased.

The invention provides a gas-phase reaction device for preparing transition metal oxide nanoparticles and a use method of the gas-phase reaction device, and belongs to the field of special devices or equipment for metal powder. The gas phase reaction device comprises a gas storage unit, a reaction unit and a collection unit. Wherein the gas storage unit is suitable for providing carbon monoxide and ozone; the reaction unit is configured to contain a transition metal simple substance, and the reaction unit is suitable for sequentially receiving carbon monoxide and ozone, so that the transition metal simple substance is sequentially subjected to carbonylation coordination reaction and oxidation reaction in a gas-phase atmosphere to obtain the transition metal oxide nanoparticles; the transition metal oxide nanoparticles take reaction tail gas as a carrier to be output from the reaction unit; the collection unit is configured to filter, collect and store the transition metal oxide nanoparticles.

Systems and methods for synthesizing ammonia include one or more electrochemical hydrogen pumps to recover excess hydrogen gas from the ammonia synthesis product stream. The systems and methods improve overall yield and efficiency of the ammonia production process by separating and purifying hydrogen gas that otherwise would be lost.

The invention discloses an active and passive control combined thermal management type methane reforming reactor which comprises a reactor shell and a stepping motor, the reactor shell and a sapphire window connected with the upper end of the reactor shell form a reaction cavity, and the reactor shell is filled with a porous medium; one side of the reactor shell and the bottom of the shell are respectively provided with a reaction gas inlet and a reaction gas outlet; a heat storage device shell is fixed to the outer side of the reactor shell, and a phase change heat storage material is installed in a closed cavity defined by the outer side of the reactor shell, the heat storage device shell and the sapphire window. A heat preservation layer is arranged on the outer side of the heat storage device shell in a surrounding mode. The stepping motor is used for driving the reactor to be close to or away from a solar radiation focus so as to adjust heat input. The phase change heat storage material is used for storing excess heat and performing heat compensation when the temperature is low, and the reactor is actively adjusted to be close to or away from a solar radiation focus to enable the surface energy flow of the reactor to tend to be stable, so that the problem that the methane dry reforming reaction is unstable is solved.

Systems and methods for synthesizing ammonia include one or more electrochemical hydrogen pumps to recover excess hydrogen gas from the ammonia synthesis product stream. The systems and methods improve overall yield and efficiency of the ammonia production process by separating and purifying hydrogen gas that otherwise would be lost.

The invention relates to the technical field of methanol preparation through oxycarbide hydrogenation, in particular to a method for preparing methanol through oxycarbide hydrogenation for an offshore energy island. The method comprises the following steps: S1, partially reducing CO2 into CO through an electrocatalytic reduction reaction to form a CO and CO2 mixed gas with a controllable carbon-oxygen ratio, and controlling the volume ratio of CO2 / (CO2 + CO) in the mixed gas to be 10-60%; and S2, reducing the mixed gas of CO and CO2 and H2 into methanol through thermocatalysis. According to the method, green hydrogen obtained through power generation and hydrogen production of renewable energy serves as a raw material of CO2 hydrogenation reaction, methanol is prepared by combining CO2 obtained through ship flue gas CO2 capture and island air CO2 capture, the method has the advantages of being high in CO2 conversion rate, high in methanol selectivity, small in energy consumption, long in catalyst service life and the like, the renewable energy on an offshore energy island can be effectively utilized, and the method is suitable for industrial production. And ship carbon emission reduction and CO2 resource utilization are facilitated.

The invention relates to a device for synthesizing urea, comprising an ammonia source 10 and a urea synthesis unit 20 wherein the ammonia source 10 is connected to the urea synthesis unit 20 by means of a reactant line 30, characterized in that the device comprises an ammonia turbine 40 wherein the ammonia source 10 is connected to the ammonia turbine 40 by means of a fuel line 50, and the ammonia gas turbine 40 is connected to the urea synthesis unit 20 through a steam pipeline 60.

The utility model provides a gas reaction device, comprising: a reaction container, which is provided with a reaction space, a gas inlet and a gas outlet, the gas inlet and the gas outlet are communicated with the reaction space, and the gas inlet and the gas outlet are respectively arranged at two opposite ends of the reaction space; the at least one heat conduction jacket is arranged on the outer side of the reaction container and is attached to the outer wall of the reaction container, the heat conduction jacket is used for forming a heat conduction flow channel, and the heat conduction flow channel extends in the distribution direction of the air inlet and the air outlet so as to guide the internal heat transfer medium to flow in the direction from the end where the air inlet is located to the end where the air outlet is located. The heat transfer medium can absorb part of heat released by the raw material gas in the reaction space close to the gas inlet, so that inactivation caused by thermal sintering of a catalyst arranged near the gas inlet due to over-high temperature of the reaction space close to the gas inlet is avoided, and the gas reaction efficiency is improved.

The invention includes a systems and methods for producing a gaseous outflow stream comprising chemical products and thermal energy, where the method includes providing a first reactant stream comprising CO2 and a second reactant stream comprising a hydrocarbon reactant, providing a plasma reactor equipped with a source of microwave energy for forming a non-thermal plasma; mixing the first reactant stream and the second reactant stream to form a feedgas mixture; directing the feedgas mixture to encounter microwave energy in the plasma reactor, wherein the microwave energy energizes the feedgas mixture to form the non-thermal plasma, thereby producing thermal energy and transforming the feedgas mixture in the non-thermal plasma into a product mixture comprising the chemical products; and directing the product mixture and the thermal energy to exit the plasma reactor, thereby forming the gaseous outflow stream comprising the chemical products and the thermal energy.

The utility model belongs to acetamide preparation device technical field, concretely is a kind of for the vaporizer of acetamide preparation, including shell, shell includes heat preservation shell, the right side surface of heat preservation shell is fixedly connected with first connecting block, the right side surface of heat preservation shell is movably connected with connecting shell, the surface of connecting shell is equipped with first through-hole, first connecting block extends to the right side of connecting shell through first through-hole, the surface of first connecting block is equipped with third through-hole, the right side surface of connecting shell is installed with fixed mechanism, fixed mechanism includes connecting plate, the left side surface of connecting plate is fixedly connected with the right side surface of connecting shell, the left side surface of connecting plate is fixedly connected with electric telescopic handle, the telescopic end of electric telescopic handle is fixedly connected with second connecting block, the surface of second connecting block is movably connected with connecting hook.The utility model is easy to disassemble shell to replace internal element, to reduce production cost.

This invention provides a sulfur recovery device. The sulfur recovery device includes a reaction section having a first reaction chamber and a first inlet, a second inlet, and a product outlet communicating with the first reaction chamber; a feeding section including a first air inlet pipe configured to introduce hydrogen sulfide gas into the first reaction chamber via the first inlet; an air inlet section for supplying air to the second inlet; a sulfur collection section including a receiving structure and a first collection pipe communicating with the product outlet; and an air distribution ratio adjustment section including a controller and a temperature detection component. The temperature detection component is disposed on the first air inlet pipe and is controlled by the controller, which is also controlled by the air inlet section to control the air flow rate supplied by the air inlet section to the second inlet. The technical solution of this invention solves the problem in existing sulfur recovery devices that affect the air distribution ratio adjustment.

This invention discloses a process for producing dilute nitric acid using a tail gas oxygenation cycle, belonging to the field of nitric acid preparation. First, the nitrogen-oxygen ratio is controlled to heat the nitrogen-oxygen mixture before it enters an ammonia mixer. The mixture undergoes ammonia oxidation in an oxidation furnace to produce NO. After recovering heat through a waste heat boiler, economizer, and demineralized water preheater, the mixture is cooled by a rapid cooler and then enters a dilute acid separator. The condensed dilute acid from the bottom of the separator is transported to an oxidation absorption tower. At the bottom of the oxidation absorption tower, NO is further oxidized to NO2 in the mixed gas. The remaining NO at the bottom of the oxidation absorption tower... x The mixed gas enters the upper part of the oxidation absorption tower through a baffle plate, where oxidation and absorption occur simultaneously. In the lower part of the absorption section, 55-60% dilute nitric acid is formed and flows to the upper part of the bleaching tower. After treatment in the bleaching tower, the finished acid flows out. The tail gas from the top of the oxidation absorption tower is pressurized by a booster and then enters an oxygen mixer for recycling. This invention solves the problem of tail gas pollution in nitric acid production, with low investment costs, high finished acid concentration, and low energy consumption.

The invention discloses an injection type reaction device for preparing hydrocarbon fuel through high-pressure carbon dioxide hydrogenation and a design method thereof, the injection type reaction device comprises a reactor and further comprises an injector connected with the reactor in series, the injector comprises a suction chamber, an equal-volume mixing chamber and a diffusion chamber which are communicated in sequence and form a whole, the suction chamber is provided with a first inlet used for arranging a nozzle and a second inlet used for leading in driving fluid. The high-pressure low-speed working fluid is converted into low-pressure high-speed working fluid through the nozzle and enters the suction chamber, negative pressure is formed in the suction chamber, the driving fluid enters the suction chamber, the working fluid and the driving fluid are mixed in the constant-volume mixing chamber, and the mixed gas is pressurized through the diffusion chamber and then flows into a reactor. The gas circulation power consumption is reduced, and the system energy utilization efficiency and the hydrogenation catalytic reaction efficiency are improved.

The invention relates to a process for producing phosgene by reacting carbon monoxide and chlorine in the presence of a heterogeneous catalyst, comprising: (a) feeding the chlorine and the carbon monoxide into at least one reaction tube which contains the catalyst; (b) reacting the chlorine and the carbon monoxide, thereby forming a phosgene containing reaction gas; (c) cooling the at least one reaction tube by indirect heat transfer to a heat transfer medium which flows through a space surrounding the at least one reaction tube; (d) withdrawing the phosgene containing reaction gas from the at least one reaction tube, wherein the heat transfer medium supplied to the space surrounding the at least one reaction tube has an entrance temperature which is increased from a starting temperature to a maximum temperature.

The utility model provides a formaldehyde oxidation reactor. The formaldehyde oxidation reactor comprises a bottom plate; the reaction tank is fixedly connected to the top of the bottom plate, a first blocking disc is installed at the position, close to the bottom, in the reaction tank, a connecting pipe is fixedly connected to the middle of the top of the first blocking disc, two exhaust ports are formed in the outer surface of the connecting pipe, and a second blocking disc is fixedly connected to the top end of the connecting pipe; a plurality of jet heads are mounted on the inner surfaces of the second blocking disc and the first blocking disc, a filtering assembly is mounted at the position, close to the top, in the reaction tank, and a sealing cover is mounted at the top of the reaction tank. According to the formaldehyde oxidation reaction device provided by the utility model, through the design, the loss of formaldehyde gas in the reaction tank can be reduced through the first blocking disc and the second blocking disc, so that the reaction gas and formaldehyde can be subjected to full oxidation reaction, and the reaction effect is improved.

The invention discloses a Joule catalytic device and method for preparing low-carbon olefins, alkanes and oxygen-containing organic matters, and the method comprises the following steps: electrifying a catalytic substrate conductive material, enabling the catalytic substrate conductive material to be in contact with a carbon-containing substance and a reducing gas, and carrying out a reaction to obtain a product; the catalytic substrate conductive material comprises a carbon substrate and a metal catalyst arranged on the carbon substrate; the reaction pressure is 0.1 to 5 MPa. According to the Joule catalytic device adopting the integral catalytic matrix conductive material, interaction between the catalyst and the carbon substrate is promoted through the electric heating synergistic effect, the tolerance of the reaction to the temperature and pressure is expanded, the reaction can still be smoothly carried out even under the high-temperature and high-pressure conditions, and by regulating and controlling the reaction conditions or the catalyst, the reaction efficiency is improved. The selective regulation and control of products or product proportions are realized.

The invention discloses a device and a method for preparing 6-aminocapronitrile. The device comprises a feeding pipe, a preheater and a catalytic reactor which are communicated in sequence, the feeding pipe comprises a feeding pipe section and a mixing pipe section which are communicated with each other along the flowing direction of ammonia gas; wherein one end, far away from the mixing pipe section, of the feeding pipe section is an ammonia gas feeding end and is provided with an ammonia gas inlet; one end, close to the mixing pipe section, of the feeding pipe section is a caprolactam feeding end, and a caprolactam inlet is formed in the pipe wall of the caprolactam feeding end; the device further comprises a nozzle component, and the nozzle component extends into the cavity of the feeding pipe section through the caprolactam inlet. And the nozzle part comprises an atomizing nozzle. According to the device and the method, a caprolactam-ammonia low-boiling-point mixing system is formed through rapid turbulent mixing, so that caprolactam is rapidly vaporized at a relatively low temperature, polymerization and decomposition caused by a long-time high-temperature environment during vaporization of caprolactam are avoided, the raw material loss of caprolactam is effectively reduced, and the stability of the device is improved.

To provide a method and a system for chemical vapor deposition which reduce the problem that debris enters a collection chamber and contaminates a deposition product when the deposition product is transferred from a reactor to the collection chamber.SOLUTION: To purge debris from between the collection valve 140 and the bypass valve through the bypass valve 142 of the collection chamber 120, the collection valve between the reactor 110 and the collection chamber and the purge valve between the collection valve and the collection chamber are opened while the bypass valve is open. The purge valve is then closed and the collection valve is opened to direct deposition products from the reactor to the collection chamber for processing.SELECTED DRAWING: Figure 4

A non-transitory, processor readable medium stores instructions that, when executed by a processor, causes the processor to receive (1) an indication of a feed gas flow rate measured between a feed gas source and an internal combustion engine (ICE) and (2) an indication of an oxygen enriched air flow rate measured between an air separation unit (ASU) and the ICE. A measured equivalence ratio is determined based on a feed gas composition, the feed gas flow rate, and the oxygen enriched air flow rate. The instructions further cause the processor to generate at least one of a first signal to cause a change in revolution speed of the ICE, a second signal to cause a first flow control device to modify the feed gas flow rate, or a third signal to cause a second flow control device to modify the oxygen enriched air flow rate.

A system for producing liquid fuel including a hydrocarbon source, a fuel cell unit configured to output anode exhaust gas containing a predetermined amount of C02, and a reformer configured to receive a first hydrocarbon feed portion from the hydrocarbon source and the anode exhaust gas from the fuel cell unit, such that the reformer is configured to output a syngas having a first H2 / CO ratio of at most 2:1.

The utility model discloses a visible vacuum coil heating device, belongs to the technical field of test equipment, and aims to overcome the defect that the parameter setting cost of the existing sediment manufacturing equipment is higher. The heating device comprises an inner transparent tube and an outer transparent tube sleeved outside the inner transparent tube, a cooling space is arranged between the inner transparent tube and the outer transparent tube, the cooling space is provided with a water inlet and a water outlet, a coil is wound on the outer wall of the inner transparent tube, and a vacuum cavity is arranged in the inner transparent tube and provided with a graphite tube. The heating device further comprises a temperature detection device and a pressure detection device for detecting the temperature of the graphite pipe and the air pressure of the vacuum cavity. A magnetic field generated by electrifying the coil can heat the graphite pipe, so that specific mixed gas in the vacuum cavity can react to form sediments, the inner transparent pipe and the outer transparent pipe are convenient for observing the state of the sediments, the sediments can reach the optimal state by controlling the temperature and the pressure, and parameters required by the sediments in the optimal state are convenient to obtain; and the parameter acquisition cost is reduced.

A hydrogen production apparatus includes a first separation device that separates hydrogen from a steel by-product gas and discharges a first mixed gas containing carbon monoxide and methane, a pre-reforming device that receives the first mixed gas and a first water vapor, converts hydrocarbon into methane, and discharges a second mixed gas containing the methane, a mixed reforming device that receives the second mixed gas and a second water vapor and discharges a third mixed gas containing the hydrogen and the carbon monoxide, and a second separation device that individually separates the hydrogen and the carbon monoxide from the third mixed gas.

To provide a chemical vapor deposition system, a gas curtain module for a gas distribution system of the chemical vapor deposition system, and a valve control method for such a system.SOLUTION: A gas distribution system 130 for transporting deposition products from a reactor to a collection chamber comprises a gas curtain module 142 disposed in a pipeline between a gas inlet 131 and a collection valve 140, wherein the gas curtain module comprises one or more purge gas inlets and is configured to introduce a purge gas into the pipeline at that location.SELECTED DRAWING: Figure 2

The present invention discloses a production circulation system for thiophene. Two mixers are arranged successively before and after on the reaction pipeline. The butadiene inlet pipeline is communicated with the side of the first production mixer. The sulfur inlet pipeline is branched into two branches, which are respectively communicated with the tops of the first production mixer and the second production mixer. The gas-liquid product outlet is arranged below the second production mixer; a heat exchanger assembly is provided in the tar separator; the gas-liquid mixture coming out from the top of the gas outlet of the tar separator enters the condenser, and thiophene is separated out from the outlet of the condenser; the gas-liquid mixture treated by the condenser sequentially enters two pressurization and cooling processors; the liquefied gas coming out from the second pressurization and cooling processor is circulated to the butadiene inlet pipeline through a pipeline. The purpose of the present invention is to provide a production system that can effectively reduce the generation of tar in the reaction system, improve the thiophene yield, and effectively treat other hydrogen components and heavy components.

The utility model discloses a flexible green ammonia synthesis system and relates to the technical field of ammonia synthesis. Comprising a synthesis tower A and a synthesis tower B which are arranged in parallel, a hydrogen production unit and a nitrogen production unit which are used for feeding raw material gas into the synthesis tower A and / or the synthesis tower B, and an ammonia separation unit which is used for treating mixed gas prepared and produced by the synthesis tower A and / or the synthesis tower B. According to the utility model, through the synthesis tower A and the synthesis tower B which are arranged in parallel, when the supply quantity of hydrogen and nitrogen generated based on photovoltaic or wind energy is sufficient, the heat generated by the synthesis tower B is collected by utilizing the heat storage unit; when the supply quantity of hydrogen and nitrogen generated based on photovoltaic or wind energy is reduced, the heat storage unit is firstly used for heating the synthesis tower A so as to control the temperature in the synthesis tower A to rise to the starting temperature, only the synthesis tower A with low design capacity is started, and the heat generated by ammonia synthesis in the synthesis tower A is used for maintaining the temperature in the synthesis tower B to be higher; the subsequent normal starting of the synthesis tower B is facilitated.

The present invention provides a bubble column reactor, comprising a lower chamber formed in the lower part, a reaction zone formed in the upper part of the lower chamber, a dispersion plate formed between the lower chamber and the reaction zone, and a gas supply pipe connected to the lower chamber to supply gaseous reactants, wherein the gas supply pipe includes an injection section extending into the lower chamber, wherein the injection section includes a plurality of nozzles that inject gaseous reactants onto the lower side of the lower chamber.

The invention discloses a method and a device for solid phase generation through gas phase mixing reaction and gas-solid separation, the device comprises a device body, a gas preparation area, a mixing reaction area and a product collection area are sequentially arranged in the device body from bottom to top in a communicating manner, the gas preparation area comprises a sublimation bin, and a gas outlet of the sublimation bin extends upwards and is connected with the mixing reaction area above the sublimation bin; a plurality of high-pressure airflow inlets are circumferentially formed in the position, flush with the gas outlet in the top of the sublimation bin, of the bottom end of the mixed reaction area; the mixed reaction area is of a big-end-down conical structure, a conical turbulent flow partition is erected in the middle and comprises an upper conical partition and a lower conical partition with spiral rising arc-shaped concave grains on the surface, and the conical wall of the mixed reaction area extends outwards to form an annular product collecting area on the connecting plane of the upper conical partition and the lower conical partition. According to the invention, high homogeneous mixing and full reaction of gas phase can be realized without extra power, and the whole process of preparation-mixing-reaction-collection is integrated to achieve an integrated process flow.

The utility model discloses natural gas efficient reforming hydrogen production equipment, and belongs to the technical field of hydrogen production reaction containers. Comprising a pressure container, an upper end cover and a lower end cover are detachably fixed to the two ends of the pressure container in a threaded mode respectively, the upper end cover is fixedly sleeved with a collecting pipe, a stirring mixer is installed between the upper end cover and the lower end cover, and a methane conveying assembly, a water vapor conveying assembly and a heating mechanism are installed in the pressure container. The heating mechanism comprises two heat conducting rings, the heat conducting rings are fixedly arranged on the inner wall of the pressure container, a plurality of heat conducting plates are fixedly arranged between the heat conducting rings, and the methane conveying assembly and the steam conveying assembly are the same in structure and each comprise two three-way gas inlet pipes. The purposes of full mixing and full reaction of methane and water vapor can be achieved, the amount of methane and water vapor which do not participate in the reaction is reduced, and the hydrogen productivity is greatly improved.