16 results about "Gaseous diffusion" patented technology

This application relates to the technical field of dust removal, and in particular to a multi-stage dust removal device and method for coal mine roadways with impact resistance. The device includes an upward-opening water tank with an outlet on the side. A rotating shaft is rotatably mounted on the bottom of the water tank via a bearing. A cavity for air passage is formed inside the rotating shaft. A pushing mechanism is installed on the part of the rotating shaft located inside the water tank, and a pre-treatment mechanism that cooperates with the cavity is installed on the top of the rotating shaft. The pushing disc and the fan-shaped plate cooperate to push impurities floating on the water surface upward, which can effectively remove floating impurities on the water surface and prevent them from forming a barrier film on the water surface. This creates an unobstructed channel for gas diffusion. That is, when the water surface is kept clean and unobstructed, the gas can escape from the water surface more smoothly, the separation efficiency of impurities and gas is significantly improved, and thus the dust removal effect of the gas is greatly improved.

The present application relates to an atomic layer deposition system, comprising: a body, a carrier, a gas spraying module and a first ring. The body surrounds a reaction chamber; the carrier is located in the reaction chamber. The gas spraying module is arranged on the body and comprises at least one gas inlet and at least one gas diffusion plate between the carrier and the at least one gas inlet, each gas diffusion plate comprises a plurality of perforations. The first ring defines a radial direction and is arranged between the carrier and the at least one gas diffusion plate. The plurality of perforations distributed in the area of the at least one gas diffusion plate defines an outermost distribution contour, the radial dimension of the inner wall of the first ring is greater than the radial dimension of the outermost distribution contour, and the inner wall of the first ring and the outermost distribution contour maintain a distance in the radial direction. The inner wall of the reaction chamber of the present application is not easy to generate residues, effectively reduces the production cost and has good manufacturing effect.

The utility model discloses a kind of drying device, it includes box and gas storage tank, gas diffusion plate and heating element from top to bottom being arranged in the inside of the box, the top of the box is provided with several air inlet holes, bottom is provided with several air outlet holes, the bottom of the gas storage tank is provided with several first diffusion holes, the gas diffusion plate is provided with several second diffusion holes, gas is entered into the gas storage tank from the air inlet hole and sequentially diffused to the heating element on the first diffusion hole, second diffusion hole heating, heated gas is blown out through the air outlet hole. The utility model improves the uniformity of gas distribution, so that gas heating is more sufficient, uniform, can guarantee the uniformity of product drying, can avoid the phenomenon of local overheating, so as to guarantee the drying quality of product.

The application provides a spraying assembly, a reactor of a deposition device and an air inlet and outlet system thereof. The spraying assembly is arranged in a cavity of the reactor and comprises a gas passage plate arranged at an upper portion of the cavity and a shower head arranged in the cavity. The gas passage plate is provided with a gas inlet and a gas outlet. The gas inlet is arranged at a central portion of the cavity on the gas passage plate, and the gas outlet is arranged at a position deviated from the central portion. The shower head comprises a first region provided with a plurality of spraying holes and a second region provided with a plurality of exhaust holes. The spraying holes make the gas diffusion cavity and the reaction cavity in fluid communication, and the exhaust holes are in fluid communication with the gas outlet. The uniformity of the process gas flow distribution in the reaction cavity is adjusted by adjusting the size, shape and distribution of the spraying holes in the first region and / or adjusting the size, shape and distribution of the exhaust holes in the second region, so as to accurately control the uniformity of the thickness of the film formed by the deposition device and the film forming quality, thereby improving the production efficiency of the thin film deposition.

This invention provides a dual-channel gas spray head, an air intake device, and a vapor deposition apparatus. The gas spray head has a first gas diffusion chamber and a first gas convergence chamber surrounding a gas equalization disk. The equalization disk includes a first gas delivery channel and a second gas delivery channel. The gas delivery channel includes a transverse channel and a longitudinal channel. The transverse channel includes a first transverse channel arranged transversely within the equalization disk along a first direction, with its two ends connected to the gas diffusion chamber and the gas convergence chamber, respectively. The longitudinal channel extends longitudinally from the first transverse channel to the lower surface of the equalization disk. A portion of the first gas reaches the first gas convergence chamber via the first transverse channel, and another portion of the first gas reaches the reaction chamber via the first transverse channel and the longitudinal channel. The second gas delivery channel extends longitudinally through the equalization disk and is spaced apart from the longitudinal channel. The second gas reaches the reaction chamber via the second gas delivery channel. This invention can improve the replacement efficiency of the gas spray head and the uniformity of the gas phase precursor intake.

This invention discloses a method and system for diagnosing gas leaks in outdoor GIS equipment, relating to the field of power equipment monitoring technology. The method includes acquiring time-series data synchronously collected by a mobile inspection platform moving along the periphery of the GIS equipment, including the original concentration of sulfur hexafluoride gas, ambient wind speed, wind direction angle, and platform spatial coordinate sequence; denoising the original concentration sequence and compensating for environmental wind field interference by combining the wind speed and wind direction angle sequences to generate a corrected concentration sequence; inputting this into a preset sensor dynamic response inverse model to obtain an instantaneous true concentration estimation sequence compensated for physical response lag; smoothing and interpolating the platform spatial coordinate sequence trajectory to generate a continuous motion trajectory function; spatiotemporally fusing the instantaneous true concentration estimation sequence with the motion trajectory function to generate a spatial concentration distribution function, and determining the spatial coordinates of the leak source by searching for its global or local maxima. This invention can eliminate the influence of wind field on gas diffusion and improve the accuracy of leak concentration measurement.

A gas diffusion member capable of tumbling is provided. The gas diffusion member is composed of a material having flexibility, and is disposed between a separator and a catalyst layer of a fuel cell, the gas diffusion member including: a gas diffusion portion including a plurality of first grooves and first ribs that constitute a gas flow path on a planar surface of the separator side, the plurality of first grooves being formed in a first direction, the first ribs being formed between adjacent first grooves; and an introduction portion connecting a manifold for supplying a gas to be introduced into the gas diffusion portion and the gas diffusion portion, wherein the introduction portion includes a plurality of second grooves having a second direction different from the first direction of the first grooves, second ribs formed between adjacent second grooves, and third grooves having a direction identical to the first direction.

The application discloses a kind of toxic gas leakage diffusion range simulation prediction method, it is related to electric digital data processing technical field, can solve the technical problem that present stage is difficult to consider prediction accuracy and real-time when simulating and predicting the leakage diffusion range of toxic gas, leading to unable to provide accurate and efficient decision support for emergency response, comprising: obtaining the gas diffusion related data of gas leakage area;According to the gas diffusion related data, humidity intensity correction term is constructed;Wherein, humidity intensity correction term is used to correct the influence of air humidity on toxic gas diffusion concentration;According to the gas diffusion related data, water gas phase solution correction term is constructed;Wherein, water gas phase solution correction term is used to correct the influence of water area on toxic gas diffusion concentration;According to humidity intensity correction term, water gas phase solution correction term and preset gas diffusion model, the leakage diffusion range of toxic gas is simulated and predicted, and the diffusion prediction result of toxic gas is obtained.

The application discloses a nitrogen-oxygen sensor, a nitrogen-oxygen sensing control system and a method for measuring nitrogen-oxygen, and the nitrogen-oxygen sensor comprises a sensor element, a gas diffusion path is arranged in the sensor element, a first diffusion barrier and a second diffusion barrier are sequentially arranged on the gas diffusion path, a functional electrode group is arranged on the sensor element, and a heater is integrated on the sensor element and used for heating the sensor element; the functional electrode group comprises an oxygen electrode unit, a reference electrode unit, a nitrogen oxide electrode unit and a common electrode unit, the oxygen electrode unit is used for pumping oxygen and generating a first current signal positively related to the oxygen concentration, the reference electrode unit is used for detecting the oxygen partial pressure, and the nitrogen oxide electrode unit is used for decomposing nitrogen oxide and generating a second current signal positively related to the nitrogen oxide concentration; and the application can simplify the sensor structure, reduce the manufacturing cost, and improve the measurement accuracy of the oxygen and nitrogen oxide concentration, the anti-interference ability and the high-temperature stability.

The utility model relates to a kind of hydrogen sensors.The hydrogen sensor includes shell and upper cover, upper cover is provided with the gas inlet hole through along the height direction of upper cover, the gas inlet hole is microchannel, diameter is 0.1-2.0mm, length is 1.5-4.5mm.Working electrode is fixedly arranged on the inner side surface of upper cover in shell, and working electrode is set to be opposite to the gas inlet hole, so that the gas in the gas inlet hole can quickly diffuse to working electrode.The gas inlet hole is microchannel in the utility model, since H2 molecule has smaller volume than CO, H2 reaches working electrode with faster diffusion characteristics, which can effectively reduce the cross interference of CO on H2.Gas directly diffuses to working electrode from gas inlet hole, greatly shortens the time of gas diffusion, and accelerates the response time of sensor.

The present application belongs to the technical field of special gas capture and recovery, and discloses a microporous-mesoporous hierarchical carbon molecular sieve for low-concentration SF6 capture and its preparation and application, aiming to solve the technical problem that low-concentration sulfur hexafluoride (SF6) is difficult to be efficiently recovered indoors. The method comprises the following steps: impregnating a biomass hard-shell material with a zinc salt aqueous solution; performing a medium-temperature pre-carbonization treatment under an inert atmosphere; and performing a physical activation under a high-temperature carbon dioxide atmosphere to obtain a microporous-mesoporous hierarchical carbon molecular sieve with an ordered distribution. The carbon molecular sieve adsorbent prepared by the present application is mainly microporous and contains a certain proportion of mesopores conducive to gas diffusion, and exhibits excellent adsorption and separation performance for low-concentration sulfur hexafluoride. When the volume fraction of SF6 is 1000 ppm and 3000 ppm, the adsorption capacity is 0.11 mmol / g and 0.29 mmol / g, respectively, which is more than twice that of a commercial molecular sieve.

A high-efficiency reactor for phase transformation of refractory iron ore is disclosed. The reaction chamber and gas supply chamber are integrated into one structure, with the reaction chamber located directly above the gas supply chamber. The reaction chamber and gas supply chamber are separated by an air distribution plate with an elliptical arc cross-section. The reaction chamber adopts a horizontal oil tank-type structure with an elliptical cross-section, while the gas supply chamber has a crescent-shaped cross-section. The air distribution plate also has an elliptical arc cross-section. The reactor's length is divided into an inlet and an outlet, respectively. The reactor interior employs a multi-chamber structure with elliptical baffles. An arc-shaped notch is provided at the end of the baffle's major axis. The smooth curved reactor wall weakens the force exerted on the bulk material, further reducing the diffusion resistance of reducing gas, avoiding the formation of fluidization dead zones, improving bed fluidization, and facilitating smoother heat and mass transfer. This further enhances reaction efficiency, prevents coking of bulk material inside the reactor, and further improves the utilization rate of the reactor's internal space.

The present invention relates to a method for implementing a gas diffusion model, comprising the steps of: (a) setting a three-dimensional grid including a first voxel (v1) and a second voxel (v2); (b) allocating a first gas concentration value (d11; d21) of the first time (t1) to each of a first voxel (v1) and a second voxel (v2); (c) obtaining a twelfth gas concentration change value (Δf12) of the first voxel (v1) from the difference between a first gas concentration value (d11) of the first voxel (v1) and a first gas concentration value (d21) of the second voxel (v2); and (d) applying the 12th gas concentration change value (Δf12) of the first voxel (v1) to the first gas concentration change value (d11) of the first voxel (v1) so as to designate same as a second gas concentration value (d12) of the second time (t2) of the first voxel (v1).

The application discloses a harmful gas detection method and system based on a smart well lid, and relates to the field of environmental monitoring.The method is applied to a gas monitoring system, and the method comprises the following steps: acquiring pipeline monitoring data of a region governed by a target well lid, wherein the pipeline monitoring data comprises a first underground pipeline network diagram, a plurality of diffusion nodes and gas distribution data; generating a plurality of feasible diffusion paths according to the pipeline monitoring data; predicting harmful gas prediction data of the plurality of feasible diffusion paths by adopting a three-dimensional convection diffusion model; correcting the first underground pipeline network diagram according to the gas distribution data and the harmful gas prediction data of the plurality of feasible diffusion paths, so as to obtain a second underground pipeline network diagram; and performing gas diffusion analysis on the second underground pipeline network, so as to obtain a real harmful gas distribution diagram of the region governed by the target well lid. By implementing the technical scheme provided in the application, the problem that early warning of harmful gas is not timely due to frequent blockage and leakage of underground pipelines is solved.

The application discloses a method for electrochemically catalytically converting carbon dioxide into multi-carbon products and a composite electrode. The application discloses a preparation method of a copper-based catalyst / gas diffusion electrode composite electrode modified by a p-block metal element, and the method comprises the following steps: 1) adding an auxiliary water solution, a copper salt water solution and a p-block metal salt water solution into water to obtain a mixed solution; 2) sequentially adding an alkali solution and a reducing agent water solution into the mixed solution to obtain a precipitate; 3) sequentially washing and drying the precipitate to obtain a solid powder; 4) modifying the solid powder on a gas diffusion electrode to obtain a catalytic electrode; and 5) assembling the catalytic electrode into a gas diffusion flow electrolysis cell, and performing in-situ electrochemical reduction on the catalytic electrode by taking carbon dioxide as raw material, and thus the composite electrode is obtained. Compared with a copper-based catalyst without modification, the composite electrode improves the selectivity of electrochemically catalytically converting carbon dioxide into multi-carbon products, and simultaneously has excellent electrochemical catalytic conversion stability under the condition of a large current density.

This invention discloses a gas diffusion simulation device, testing method, and application. The gas diffusion simulation device includes a wind field system, a gas release system, and a concentration monitoring system. The wind field system provides a stable wind speed to the concentration monitoring system. The gas release system provides a stable flow rate of gas to the concentration monitoring system. The output terminals of the wind field system and the gas release system are located on the same side of the concentration monitoring system. The concentration monitoring system includes a test frame, an anemometer, and a gas concentration acquisition module. The concentration monitoring system is used to acquire gas concentration. The simulation device of this invention can be used to accurately acquire data on the diffusion concentration in the downstream space after a natural gas leak. It also provides a testing method based on the above-mentioned gas diffusion simulation device and its application in calculating Gaussian diffusion model coefficients.