93results about "Gas-gas reaction processes" patented technology

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.

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 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 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 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.

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 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.

The application relates to a low-energy-consumption ammonia water synthesis device and process, which comprises an ammonia synthesis reaction unit, an ammonia gas absorption unit and a circulating gas dehydration unit; the ammonia synthesis reaction unit comprises an ammonia synthesis reactor, which can convert raw material hydrogen and nitrogen into ammonia mixed gas through the ammonia synthesis reactor; the ammonia gas absorption unit comprises an ammonia gas absorption tower, which can convert the ammonia mixed gas into ammonia water and residual gas through the ammonia gas absorption tower; the circulating gas dehydration unit comprises a plurality of separators, which can generate circulating gas by separating and dehydrating the residual gas, and the circulating gas is returned to the ammonia synthesis reactor again. The application separates ammonia from the mixed gas generated by the ammonia synthesis reactor through an absorption method, directly obtains ammonia water with a specific concentration, and simplifies a process flow. Meanwhile, by increasing the circulating gas amount, the pressure of the ammonia synthesis circulating loop is significantly reduced, the investment cost and the overall operation energy consumption of the device are reduced, and the operation safety is improved.

The application provides a linear low-density film material crystal point improvement method and system, which comprises the following steps: during the switching from a high-density brand to a linear low-density brand, the hydrogen / ethylene molar ratio in a gas phase reactor is increased, and the hydrogen molar concentration is also increased; after the butene concentration in the gas phase reactor reaches a target value, the hydrogen and butene addition amounts are restored to normal film material production parameters; after the product is switched to transition material, the material level of a purification tank is adjusted multiple times; after the product is switched to transition material, a powder bin is switched to an empty powder bin; after the powder index in the purification tank enters the linear low-density film material normal product range, the powder bin is switched to another empty powder bin; the suction pressure of an extruder gear pump and the throttle valve opening degree are increased, and the filter screen is replaced. The application effectively reduces the crystal points generated in the film production process of linear low-density film material.

The utility model discloses a mixed gas heating system. The mixed gas heating system comprises a mixed gas input end, a foreground converter and a preheater, the preheater is arranged between the mixed gas input end and the foreground converter in parallel; a heater is further arranged between the mixed gas input end and the foreground converter, and the heater is connected with the preheater in series. The mixed gas is heated through the series heater, so that the working stability and reliability of the foreground converter can be effectively improved, the risk of pipeline corrosion damage is reduced, and the operation reliability of the mixed gas heating system is improved.

This invention proposes an apparatus and method for preparing multi-metal oxide nanocomposites, belonging to the field of specialized equipment or devices for metal powders. The apparatus includes: a precursor gas generating module for preparing multi-metal precursor gas, comprising a main metal precursor gas and multiple doped metal precursor gases; an oxidation gas generating module for preparing ozone; a turbulent mixing module for receiving and premixing the multiple doped metal precursor gases; a reaction doping module for subjecting the main metal precursor gas, dopant components, and ozone to a gas-phase oxidation doping reaction to generate multi-metal oxide nanocomposites for catalytic water electrolysis to produce hydrogen, wherein the dopant components are premixed doped metal precursor gases or metal single atoms; and a thermal decomposition module for receiving and heating the premixed doped metal precursor gas when the dopant component is a metal single atom, causing it to pyrolyze to obtain metal single atoms.

Disclosed is a method and a system for chemical vapor deposition. A collection valve between a reactor and a collection chamber and a purge valve between the collection valve and the collection chamber is open while a bypass valve for the collection chamber is open for purging debris from between the collection valve and the bypass valve through the bypass valve. Thereafter, the purge valve is closed and the collection valve open for directing the deposition product from the reactor to the collection chamber for treatment.

The invention discloses a method for preparing acetonitrile by an acetic acid ammoniation method, and belongs to the technical field of chemical engineering. In the invention, the inlet low-temperature area promotes ammoniation of acetic acid to generate acetamide, thereby avoiding catalytic polymerization of acetic acid; acetamide is dehydrated to generate acetonitrile in the middle-section medium-temperature zone; and the lower-end high-temperature area preferentially completes deep conversion of unreacted substances. Axial temperature gradient distribution is formed in the fixed bed reactor, the reaction process is optimized, and the problems of excessive reaction, hot spot out-of-control and low selectivity caused by traditional overall heating are solved. According to the method for preparing acetonitrile by the acetic acid ammoniation method based on segmented temperature control, the utilization rate of raw materials is increased, side reactions are reduced, the yield of acetonitrile is increased to 99% or above, the yield of series of impurities such as acetone and acetamide is lower than 1%, and the cost of a subsequent purification process is reduced; meanwhile, the catalyst coking probability is reduced, and the service life of the catalyst is prolonged.

The invention belongs to the technical field of environmental monitoring, and discloses a hydroxyl radical online generation and reference inspection method and device and application, and the device comprises a laser splitting unit, a laser collimation and focus lens group, a laser incident cavity, a reference cavity, a laser emergent cavity and an atmospheric hydroxyl radical measurement cavity. The device not only can continuously and stably generate high-concentration hydroxyl radicals, but also can monitor resonance fluorescence signals generated by the hydroxyl radicals in real time, has the advantages of high signal-to-noise ratio, low cost, good adaptability, stable and reliable operation and the like, and can be used as a key core component of a free radical measurement system by a laser-induced fluorescence method. The method not only can be directly applied to dye laser wavelength monitoring and locking, but also can be applied to dye laser wavelength calibration instead of a wavemeter.

The utility model provides a system for coupling carbon dioxide capture and in-situ methanation, which comprises a gas conveying and switching unit, an adsorption and conversion unit, a product collection unit and a pressure control unit, and the gas conveying and switching unit comprises a nitrogen pipeline, a flue gas pipeline and a hydrogen pipeline; the adsorption and conversion unit is filled with a composite material with double functions of adsorption and catalysis; the product collection unit is connected to the downstream of the adsorption and conversion unit; and the pressure control unit is connected between the adsorption and conversion unit and the product collection unit. According to the utility model, not only is carbon emission reduction of the petrochemical industry realized, but also high value-added utilization of carbon dioxide is realized, and liquid fuel is provided for the petrochemical industry; on the other hand, adsorption and conversion are completed in the same reactor, so that high cost and high energy consumption in the process of compressing, liquefying and transporting carbon dioxide connected with carbon capture and utilization are greatly reduced.

The invention discloses a nitric acid absorption tower and an absorption process thereof, and belongs to the technical field of nitric acid production. The nitric acid absorption tower comprises an absorption unit, a washing unit and a recovery unit, a plurality of absorption structures are arranged in an absorption box of the absorption unit in a linear array mode, and the absorption structures are used for spraying and absorbing nitric oxide to form nitric acid; the washing unit is located above the absorption unit, a plurality of gas mixing structures distributed in a linear array mode are arranged in the washing box, and the gas mixing structures are used for mixing air and nitric acid and washing the nitric acid; the recycling unit is arranged between the washing unit and the absorption unit, the washing unit is connected with the recycling unit through an exhaust pipe arranged on the upper portion of the washing unit, and the recycling unit is connected with the absorption box through a gas return pipe and sends recycled gas into the absorption box. By adopting the nitric acid absorption tower and the absorption process thereof, the problems of low nitric oxide conversion rate and low nitric acid concentration of the existing absorption tower can be solved.

The utility model provides an anti-pollution vinyl chloride synthesis system which comprises treatment reaction equipment, a hydrogen chloride supply device, an acetylene supply device and a nitrogen supply device, wherein the treatment reaction equipment is used for generating vinyl chloride; the hydrogen chloride supply device comprises a hydrogen chloride storage tank and a gas pipeline, and the gas pipeline is connected with the treatment reaction equipment hydrogen chloride storage tank and the treatment reaction equipment; the acetylene gas supply device is connected with the treatment reaction equipment through a pipeline; and the nitrogen supply device is communicated with the gas conveying pipeline of the treatment reaction equipment. In the utility model, the nitrogen supply device is connected with the gas conveying pipeline of the hydrogen chloride gas supply device, and when the equipment needs to be replaced and maintained, the nitrogen supply device supplies nitrogen into the gas conveying pipeline, so that residual hydrogen chloride gas in the pipeline and the equipment moves towards the treatment reaction equipment and is reacted, thereby ensuring that no hydrogen chloride gas escapes during replacement and maintenance; the working environment safety of personnel is guaranteed, and the situation that the personnel are in gas is avoided.

The application discloses a kind of single-walled carbon nanotube preparation device and method, belong to carbon nanotube technical field, wherein preparation device includes the heating bin for heating and gasification of solid catalyst, heating bin is fixed with gas inlet pipe and gas outlet pipe, gas inlet pipe is used to pass into carrier gas in heating bin, gas outlet pipe is used to deliver the mixed gas of gaseous catalyst and carrier gas to reactor, the top of heating bin is fixed with transfer bin, transfer bin is provided with feed inlet, discharge port and first air hole, transfer bin is also provided with sealing assembly for sealing feed inlet and discharge port, first air hole is connected with vacuum pump by pipeline;The preparation device provided in the embodiment of the application, by setting transfer bin, catalyst is added to transfer bin first, all air in transfer bin is extracted by vacuum pump, then solid catalyst is added to heating bin by opening discharge port, ensure continuous production, avoid the entry of external air during catalyst adding process.

The invention discloses a CH4-CO2 reforming bionic spider web foam reactor and an optimization design method thereof, which are inspired by excellent performance of spider webs in the aspects of bearing mechanical stress and transferring heat energy, and designs a novel foam reactor combining a high-thermal-conductivity copper alloy spider web structure and high-mechanical-strength nickel-chromium alloy porous foam. Further, parameter optimization is carried out on the branch spacing H, the main branch thickness m and the branch thickness L of the reactor through a response surface method (RSM), and when H is equal to 3 mm, m is equal to 0.9 mm and L is equal to 0.96 mm, the efficiency of converting solar energy into fuel reaches up to 41.54%. The thermal shock of non-uniform concentrating solar energy is effectively resisted, the temperature field distribution uniformity of the foam reactor is improved, the energy conversion efficiency of the foam reactor is remarkably improved, and a new reactor design scheme is provided for realizing efficient concentrating solar energy driven CH4-CO2 reforming.

The present invention relates to a gas / liquid oligomerization reactor with successive zones of variable diameter. The invention also relates to a process for the oligomerization of ethylene using a gas / liquid oligomerization reactor with successive zones of variable diameter.

The invention relates to a gas / liquid oligomerization reactor having successive zones with variable diameters. The invention also relates to a process for the oligomerization of ethylene using a gas / liquid oligomerization reactor having successive zones with variable diameters.