138 results about "Gas holdup" patented technology

The invention provides an underwater ultrasonic Doppler real-time analysis method and device based on a digital transducer, and relates to the technical field of data analys.The method comprises the steps that 1, multiple beams of directional ultrasonic waves are emitted into drilling fluid through a digital transducer array on the outer wall of a marine riser, echo signals reflected by gas-liquid two-phase flow are received, and the digital transducer array is used for receiving the echo signals; performing real-time digital conversion on the echo signal to generate an original digital signal containing phase and amplitude information; 2, Doppler frequency shift feature extraction is conducted on the original digital signals, and the real-time movement speed and direction of bubbles in the drilling fluid are determined by calculating the frequency deviation of reflected ultrasonic waves and transmitted ultrasonic waves. Through the digital transducer array and the ultrasonic Doppler technology, accurate measurement of motion parameters of bubbles in drilling fluid, real-time calculation of local gas content and early warning and grading response of gas cut are achieved, and the safety and the intelligent level of drilling operation are improved.

The present invention discloses a method for simulating the flow pattern of gas-liquid two-phase flow in a high-temperature and high-pressure wellbore and calculating the liquid holdup, which includes the following steps: establishing a wellbore geometric model and a gas-liquid two-phase flow field in the wellbore according to the basic wellbore parameters; constructing a local feature detection surface in the wellbore and detecting the instantaneous gas holdup of the wellbore cross-section; determining the probability density distribution characteristics of the gas holdup of specific flow patterns and the influence of temperature and pressure on the transition between different flow patterns; determining the critical gas holdup for different flow pattern transitions and the boundary equations for different flow pattern transitions; establishing the boundary equations for the flow pattern transition of gas-liquid two-phase flow in a high-temperature and high-pressure wellbore and determining the calculation method for the liquid holdup of different flow patterns. The present invention overcomes the drawback that the existing experimental conditions cannot conduct experimental research on high-temperature and high-pressure gas-liquid two-phase flow.

The invention belongs to the technical field of multiphase flow measurement, and relates to a bubble flow gas content ultrasonic measurement method and device based on bubble reflection, and the method comprises the following steps: measuring ultrasonic transit time tF (alpha) by using an ultrasonic transmitting and receiving probe mounted on one side of a pipeline; and based on the ultrasonic wave transit time tF (alpha) and according to a pre-calibrated relation function or relation curve of the transit time of the ultrasonic wave in the bubble flow along with the change of the gas content, the corresponding gas content alpha is calculated. According to the bubble flow gas content ultrasonic measurement method and device based on bubble reflection provided by the invention, a relation function or a relation curve that the transit time of the ultrasonic waves after being reflected by the bubbles in the bubble flow is reduced along with the increase of the gas content can be calibrated in advance by utilizing a reflection effect of the ultrasonic waves at a gas-liquid interface; in practical application, the gas content of the bubble flow can be calculated by recording the transit time of the ultrasonic waves reflected by the bubbles in the bubble flow according to the calibrated relation function or curvilinear relation.

The invention discloses a method for testing lost gas in shale gas content based on a depletion experiment device, and relates to the technical field of oil-gas field development, the depletion experiment device comprises a rock core holder, a heating jacket, a confining pressure booster pump, a gas inlet assembly, a gas outlet assembly, a vacuumizing device, a gas reference container and an arc radiation trough plate, the loss gas in the shale gas content is tested based on the depletion experiment device, the characteristic that the horizontal permeability of the shale is far greater than the vertical permeability is fully utilized, the testing device completely conforming to the real environment is designed, on one hand, the shale core can be really saturated by methane, the time required for saturating the shale core is greatly shortened, and on the other hand, the loss gas in the shale gas content is greatly reduced; on the other hand, the lost gas part in the shale gas content can be directly tested, the testing efficiency is improved, the accuracy of the testing result is also improved, and therefore powerful evidence support is provided for shale gas reservoir evaluation and reserve calculation.

The invention relates to the technical field of hydrogen energy preparation and process control, and discloses a fuzzy PID (Proportion Integration Differentiation)-based pressure control method for an alkaline electrolytic water hydrogen production system, which comprises the following steps of: firstly, acquiring current, pressure and separator liquid level data of the system in real time, and calculating a source-load gradient synergistic factor for representing the hysteresis degree of source end disturbance and load end response according to the current, pressure and separator liquid level data; and then pump valve heterogeneous cooperative control is executed, the rotating speed of a circulating pump is actively adjusted through the factor so as to change the flow speed of electrolyte, and feed-forward regulation and control of the gas holdup are achieved. Meanwhile, a gas phase rigidity coefficient is solved according to liquid level changes, a virtual damping domain is constructed, and PID integral and differential parameters are corrected in a self-adaptive mode; and finally, asymmetric variable universe fuzzy reasoning is executed, a hydrogen side universe is compressed through a source load gradient, an oxygen side driven dead zone threshold value is dynamically set, and a double-side valve instruction is output. According to the method, the problems of pressure lag and rigidity time varying under wide power fluctuation are effectively solved through flow velocity auxiliary adjustment and rigidity self-adaption strategies, and efficient and stable operation of the system is achieved.

A rod pump system is configured to provide efficient pumping operations in a downhole environment containing high gas content, using a non-locking actuator. The non-locking actuator assembly is configured to respond to high-gas conditions and automatically overcome a gas locked pump state thereby returning the system to normal pumping conditions. This system is appended to the traveling valve closed cage within a conventional rod pump in place of a conventional seat plug.

The invention discloses a slurry bed reactor with a novel spiral pipe, comprising: a tower body which is vertically arranged and is a hollow cavity with closed bottom and top; the inner spiral pipe is vertically arranged and located in an inner cavity of the tower body, and the outer spiral pipe is vertically arranged and located in the inner cavity of the tower body and arranged on the periphery of the inner spiral pipe in a sleeving mode; the inner spiral pipe and the outer spiral pipe are used for enabling fluid in the tower body to generate spiral motion, changing the distribution of the fluid in the tower body and further reducing the fluid speed in the central area, and are also used for removing heat in the slurry bed reactor through the outer surfaces of the inner spiral pipe and the outer spiral pipe; according to the invention, the problem of chimney effect or short-circuit flow existing in the traditional slurry bed reactor is solved, in addition, the problem of low gas content in the area close to the wall surface of the slurry bed reactor is also solved, the gas phase is promoted to be uniformly distributed in the slurry bed reactor, and the purpose of strengthening the performance of the slurry bed reactor is achieved.

The present invention belongs to the technical field of sampling the gas content of oil liquid specially used for oil filter machine, specifically, is a sampling device for the gas content of oil liquid specially used for vacuum oil filter machine and its using method; it comprises a fixed support frame; it is characterized in that: a first servo motor is installed on the top of the fixed support frame; a worm is installed on the first servo motor; a worm wheel is meshingly connected to the worm; a driving main shaft is connected to the worm wheel; two ends of the driving main shaft are rotatably connected to the top and bottom of the fixed support frame; a fixed disk is installed on the driving main shaft; four sampling tubes are installed on the fixed disk; a connecting tube is connected to one of the sampling tubes; a solenoid valve is connected to the connecting tube; through the transmission system of the first servo motor, the worm and the worm wheel, the rotation and positioning of the sampling tube can be accurately controlled, and the sampling tube can be switched quickly and automatically, thereby greatly improving the sampling and detection efficiency of the gas content of oil liquid of multiple vacuum oil filter machines.

The invention relates to a cold storage type bubble water machine and a control method thereof.The cold storage type bubble water machine comprises a machine body, a control system and a refrigerating system, a cold storage water tank, a steam-water mixing inner container, an evaporation coil and a cold water coil are arranged in the machine body, and a cold water cavity is formed in an inner cavity of the cold storage water tank; the steam-water mixing inner container, the evaporation coil pipe and the cold water coil pipe are arranged in the cold storage water tank and are soaked in the cold storage liquid for mutual heat exchange; the wall body of the steam-water mixing inner container is a heat conduction wall body, the water outlet end of the steam-water mixing inner container is connected with the water taking nozzle, and the air inlet end of the steam-water mixing inner container is connected with the air source. The steam-water mixing inner container and the cold water coil exchange heat with cold water in the cold storage liquid, on one hand, the cooling efficiency of drinking water can be improved, on the other hand, the whole steam-water mixing inner container can be in a low-temperature state, and the gas content in water is richer.

This invention provides a device and method for measuring the gas hydrate content. The device includes a sample container, a calibration container, a vacuum pump, a cooling device, a temperature sensor, and a vacuum gauge. The sample container, calibration container, and vacuum pump are connected to the same connecting pipe via different valves. The sample container, calibration container, and connecting pipe form a closed system. The temperature sensor and vacuum gauge are used to detect the temperature and pressure of the gas within the connecting pipe, respectively. The cooling device is used to regulate the temperature inside the sample container. Compared with existing technologies, this measuring device has a simple structure, low manufacturing cost, and is easy to promote. When using this device to measure gas hydrates, the operation process is simple, and the measurement results are not easily affected by the environment and experimental operations. It is suitable not only for on-site measurement of natural gas hydrates in exploration and extraction, and for measuring the gas hydrate content in sediment samples obtained from drilling, but also for measuring the gas hydrate content in laboratory synthetic gas hydrates.

The present invention discloses a device and method for testing the gas loss amount which simulates a wireline coring process, and belongs to the field of petroleum engineering. The device includes: a programmable temperature control thermostat for simulating temperature changes in a wireline coring process, a simulated center pipe body for constructing a simulated environment of the center pipe body being filled with drilling fluid or clean water, a simulated coring barrel for drilling for and retaining a core sample, a gas injection control and recovery device, a liquid injection control and recovery device, and a drainage and gas collection meter. The present invention has advantages as follows: it is simple to implement and can reproduce a real drilling and coring process to a certain extent; the simulation of the coordinated changes in liquid pressure and temperature environment experienced by the core sample lifted to a wellhead from a drilling bottom hole through the programmable temperature control thermostat and a program-controlled constant pressure valve, can truly reproduce the environmental conditions of a wireline coring barrel being filled with drilling fluid and the loss changes in gas content of the core sample with the coordinated descents in liquid-phase pressure and temperature in the liquid-phase filling environment in the core lift process.

The high-precision gas-containing eluent filling device comprises a dissolved gas storage tank, a dissolved gas tank, a pressure cylinder, a quantitative filling mechanism, a switching pipeline and an exhaust pipeline, the dissolved gas storage tank is connected with a gas outlet pipeline, the lower end of the dissolved gas tank is connected with a bottom communicating pipeline, the upper end of the dissolved gas tank is connected with a top communicating pipeline, and the gas outlet pipeline is connected with a gas outlet pipeline. The top communicating pipeline, the exhaust pipeline and the switching pipeline are connected through a first communicating device; the air outlet pipeline, the bottom communicating pipeline and the switching pipeline are connected through a second communicating device. By adopting a staged design of first dissolved gas saturation and then high-pressure driving filling, on one hand, eluent of each batch can reach the same saturated gas content through a stable gas-liquid contact environment in a gas dissolving stage; on the other hand, the filling stage is switched into a top gas inlet high-pressure driving mode, saturated eluent is pushed to enter the pressure cylinder and the quantitative filling mechanism, and interference of gas escape or secondary dissolution in the filling process is avoided.

The application discloses a method for testing lost gas in shale gas content based on a depletion experiment device, and relates to the technical field of oil and gas field development.The depletion experiment device comprises a core holder, a heating jacket, a confining pressure pump, a gas inlet assembly, a gas outlet assembly, a vacuum pumping device, a gas reference container and an arc-shaped radiation slot plate.The application fully utilizes the characteristic that the horizontal permeability of shale is much greater than the vertical permeability, designs a test device fully consistent with the real environment, and can make methane truly saturate the shale core and greatly reduce the time required for saturating the shale core on one hand, and can directly test the lost gas part in the shale gas content on the other hand, thereby improving the test efficiency and the accuracy of the test results, and providing strong evidence support for shale gas reservoir evaluation and reserve calculation.

The present invention relates to a wire drawing device for processing plastic particles with an automatic feeding structure applied in the field of plastic processing. The device comprises a device body and a feeding auxiliary monitoring unit mounted in a control box and connected to the control system signal. Through the coordinated cooperation of the feeding auxiliary monitoring unit with the component auxiliary control tube and the state triggering component, on the one hand, by real-time monitoring of the negative pressure state changes in the sealed feeding hopper of the component, a corresponding deformation response mechanism is triggered, thereby accurately sensing the gas content state of the plastic particles; on the other hand, when an abnormal negative pressure feedback signal is detected, an auxiliary exhaust control program in the sealed feeding hopper of the component can be immediately started, effectively reducing the residence time of air in the sealed feeding hopper and suppressing the accompanying downward feeding phenomenon, thereby constructing a dynamic protective barrier for the feeding process, improving the economy and reliability of plastic filament processing, and the quality stability and production continuity of the subsequent wire drawing process.

The utility model discloses a high-gas-content oil and gas metering and mixed conveying device, and belongs to the technical field of oil and gas conveying. Comprising a controller, a mixed transportation inlet pipe, a mixed transportation pump, a mixed transportation outlet pipe, a gas-liquid separator, a gas phase outlet pipe, a liquid phase outlet pipe, a liquid supplementing pipe, a main outlet pipe, an electric valve, a flow meter and the like, a high-gas-content oil-gas mixture firstly enters the mixed transportation pump for mixed transportation and then enters the gas-liquid separator after being pressurized by the pump, and a gas phase medium and a liquid phase medium are separated; wherein the gas-phase medium and part of the liquid-phase medium are directly output to a large station after being metered, part of the liquid-phase medium returns to a pump cavity after being subjected to pressure reduction adjustment, and liquid is supplemented to a pump when slug flow occurs, so that gas and liquid are continuously and reliably conveyed to the large station. The utility model discloses can replace traditional site, realize oil-gas-water automatic metering and mixed transportation, save land resource, save a lot of investment, realize unattended operation function, and adapt to high gas content, frequent slug flow production condition.

The invention discloses an oil-gas-water three-phase flow measuring device and method based on a uniform-speed tube vortex street and a microwave antenna, and relates to the technical field of three-phase flow detection. The device comprises a bluff body, a pressure difference transmitter, a power divider and a microwave signal source, the bluff body is vertically placed at the central position in a target pipeline, two cavities, namely a high-pressure cavity and a low-pressure cavity, are formed in the bluff body, the high-pressure cavity and the low-pressure cavity are both connected with the pressure difference transmitter, one end of the bluff body is connected with a power divider, and the power divider is further connected with a microwave signal source; the high-pressure cavity is arranged on the incident flow surface of the bluff body, and the incident flow surface is the front side surface of the bluff body; the low-pressure cavity is arranged on the back flow surface of the bluff body; and the back flow surface is the rear side surface of the bluff body. The gas content and the water content of the oil-gas-water three-phase mass flow can be measured while the oil-gas-water three-phase mass flow is accurately calculated, the manufacturing cost of the measuring device is reduced, and the structure of the device is optimized.

The invention provides a deep coal bed gas pressure-maintaining coring free gas and adsorption gas content testing system and method.The testing system comprises a control system, a pressure maintaining barrel, a gas-liquid separation device, a drying and condensing device and a flow meter, and the pressure maintaining barrel, the gas-liquid separation device, the drying and condensing device and the flow meter are sequentially communicated through a pipeline; and a numerical control pressure gauge and an intelligent flow valve are mounted on the pipeline between the pressure maintaining barrel and the gas-liquid separation device. Free gas and adsorbed gas reach the original state of dynamic balance through constant temperature, then the intelligent flow valve is controlled to be opened and closed through the control system, when the pressure in the pressure maintaining barrel is lower than the reservoir pressure, the intelligent flow valve is closed, after the pressure in the pressure maintaining barrel rises to the reservoir pressure, the intelligent flow valve is opened, operation is circulated, and the pressure maintaining barrel is opened. After the pressure in the pressure maintaining barrel cannot rise to the reservoir pressure, free gas measurement is ended; in the whole process, the pressure maintaining barrel is decompressed by adopting small displacement, and the gas volume is measured by the flow meter, so that the on-site accurate gas content test of the deep coal bed gas with high gas content and high free gas ratio is realized.

This invention discloses a method for detecting the gas content in concrete, relating to the field of concrete gas content detection technology. The key technical points are: S1: Measure the total mass of the measuring cup lid in a dry state and in a state where the air chamber is filled with water, and obtain the mass m1 of the air chamber filled with water by the difference in mass before and after; S2: Measure the total mass of the measuring cup body in a dry state and in a state filled with water, and obtain the mass m3 of the measuring cup body filled with water by the difference in mass before and after; S3: Seal the measuring cup lid and body, and add water to the measuring cup body until water emerges from the vent valve; S4: Inflate the air chamber until the indicator shows the initial pressure P1, press the valve stem to balance the pressure between the air chamber and the measuring cup, and read the pressure value on the indicator, recording it as the zero-point gauge pressure P of the gas content. 零位 S5: The m1, m3, P1, and P obtained from S1-S4 零位 Substituting into the formula yields the mathematical model function. This method can simply, quickly, and accurately detect the gas content in concrete.

The invention discloses an oxidation tail gas utilization device and method for producing hydrogen peroxide. The oxidation tail gas utilization device comprises an oxidation tower, an oxidation tail gas treatment procedure, unit operation equipment, an oxygen content online measurement assembly and an analysis treatment unit. After most of solvents such as aromatic hydrocarbon are cooled in the oxidation tail gas leaving from the top of the oxidation tower through a tail gas treatment process, one part of the oxidation tail gas is emptied or further treated, and the other part of the oxidation tail gas is sent to the top of unit operation equipment such as a working liquid tank, an extraction tower or a purification tower through judgment of an analysis treatment unit to replace a method of directly introducing fresh nitrogen. And safe operation of equipment in a system operation process is met. Operation parameters are analyzed and measured through the oxygen content on-line measurement assembly, the gas content on-line measurement assembly and the like, analysis data are transmitted to the analysis processing unit, and then output signals are transmitted to pipelines of oxidized tail gas and fresh nitrogen to control the proportion and flow of the oxidized tail gas and the fresh nitrogen, so that the use amount of the fresh nitrogen is reduced.

The invention discloses a wet desulphurization oxidation fan whole-process cooperative control method under deep peak regulation. The method comprises the following steps: firstly, acquiring and processing oxidation-reduction potential and fan operation parameters; calculating theoretical oxygen demand flow by using a self-adaptive algorithm; determining a final flow set value and adjusting fan output through arbitration in combination with anti-backflow minimum safe flow back calculation and pulse purging logic; and meanwhile, a gas holdup mapping model is established, false liquid levels caused by gas phase retention are calculated and eliminated, and real liquid levels are obtained to accurately control gypsum discharge. Through multivariable cooperation and decoupling control, the problems of chemical reaction lag, spray gun backflow blockage, liquid level measurement distortion and the like under the deep peak regulation working condition are effectively solved, and the chemical stability and mechanical reliability of the system are remarkably improved.

The utility model discloses concrete gas content detection equipment, and relates to the technical field of concrete gas content detection, the concrete gas content detection equipment comprises a supporting seat, the top of the supporting seat is fixedly connected with two supporting plates, the right side of the right supporting plate is fixedly connected with a transmission part, and the middle parts of the opposite sides of the two supporting plates are fixedly connected with a hollow plate; and the interior of the through plate is slidably connected with an abutting piece. Concrete is poured into the storage frame, the air pressure in the storage frame is recorded through the air pressure detection meter, then the motor drives the cam to rotate, the cam rotates to make contact with the groove, the groove drives the sliding block and the storage frame to move upwards, and when the smooth side of the cam makes contact with the groove, the storage frame moves downwards, and the storage frame moves downwards. The concrete in the storage frame is vibrated and reciprocated, bubbles in the concrete are reduced, the air pressure of the air pressure detection meter is observed, and the air pressure data before detection is compared with the air pressure data after detection, so that the air pressure value of the concrete can be obtained.

The utility model relates to the technical field of gas retention detection, and discloses a gas retention detection device which comprises a connecting plate, a fixed wall is fixedly mounted at the bottom of the connecting plate, a detector is fixedly mounted in front of the fixed wall, a gas pipe is fixedly mounted on the outer side of the detector, a connecting pipe is fixedly mounted on the right side of the detector, and a gas outlet is formed in the right side of the connecting pipe. And an alarm is fixedly mounted on the outer side of the connecting pipe. The fixed wall is fixedly mounted at the bottom of the connecting plate, the detectors are fixedly mounted in front of the fixed wall, and two connectors are respectively distributed in opposite directions, so that when the fan blades blow air into the connectors, the air pipes, the alarms and the air inlet cabins are different in direction, and the air pipes, the alarms, the air inlet cabins and the air inlet cabins are separated from each other. The blown-in gas belongs to different areas, and meanwhile, as the position of the kitchen is small, the gas at different positions of the kitchen can be detected, so that whether the gas at different positions leaks and is detained or not can be distinguished, and the effect of improving the detection efficiency is achieved.

The invention discloses a method for measuring the gas content in a die casting, and belongs to the technical field of material detection. The method comprises the following steps: loading a sample into the closed desorption cavity; vacuumizing and pre-degassing the cavity by using an oil-free high-vacuum acquisition module formed by connecting a molecular pump and a dry-type screw pump in series; stepwise heating is carried out on the sample through program temperature control; the released gas is guided into a differential pressure sensing metering unit through a low-thermal-conductivity aluminum oxide ceramic isolation tube; the unit comprises a reference cavity and a measuring cavity which are arranged in the same constant temperature device, and the gas inflow rate is dynamically represented by measuring the pressure difference between the two cavities; and based on the ideal gas state equation and a calculation model containing cavity thermal expansion compensation, calculating the amount of the gas substance in unit time in real time. The problems of poor precision and repeatability caused by oil pollution, thermal interference and discontinuous metering are solved, and continuous, dynamic and high-repeatability automatic measurement of the gas content in the die casting is realized.

The invention relates to the technical field of multiphase flow measurement, in particular to an online oil-gas-water three-phase flow gas content measuring device and method based on a solid liquid medium. The device comprises a variable-pipe-diameter pipe section and a quick-closing valve pipe section, the variable-pipe-diameter pipe section is connected with the quick-closing valve pipe section in series, the quick-closing valve pipe section comprises a plurality of measuring pipe sections and a plurality of pairs of opening and closing valves, and a pair of opening and closing valves is arranged on the two sides of each measuring pipe section. The variable-pipe-diameter pipe section comprises a variable-pipe-diameter afflux pipe section, a plurality of pipe-diameter pipe sections and a variable-pipe-diameter outflow pipe section, the top end of the variable-pipe-diameter afflux pipe section is connected with a reversing valve, the two sides of the reversing valve are connected with a regulation and control flow channel and a process flow channel respectively, one side of the variable-pipe-diameter afflux pipe section is connected with the plurality of pipe-diameter pipe sections in series, and the process flow channel is connected with the variable-pipe-diameter outflow pipe section. Each pipe-diameter pipe section is connected in series with a measuring pipe section, and the tail ends of the plurality of measuring pipe sections are connected in series with the same variable-pipe-diameter outflow pipe section. According to the device and the method provided by the invention, the actual situation of an oil field site is effectively simulated, and a favorable tool is provided for multiphase flow pattern research.

The present application provides a slurry bed reactor with uniform gas holdup distribution, comprising: a barrel, which is internally provided with a containing cavity, and is provided with a feed inlet, a gas inlet, a gas outlet and a liquid outlet which are communicated with the containing cavity; a gas distributor, which is arranged in the containing cavity and is close to the gas inlet and is circumferentially connected with the inner wall of the containing cavity; a plurality of gas holdup distribution adjusting devices, which are arranged in the containing cavity on the side of the gas distributor facing the gas outlet, and comprise a gas inlet part, a liquid inlet part, a mixing part and a gas outlet part, the gas inlet part, the mixing part and the gas outlet part are sequentially and communicatively arranged, the gas inlet part is arranged towards the gas inlet and the cross-sectional diameter gradually increases in the direction towards the gas inlet, the gas outlet part is arranged towards the gas outlet and the cross-sectional diameter gradually increases in the direction towards the gas outlet; the liquid inlet part comprises a first connecting section and a second connecting section which are communicated, the extension direction of the first connecting section is parallel to the line direction of the gas inlet and the gas outlet, and the second connecting section is communicated with the mixing part at the end away from the first connecting section.

The invention relates to the technical field of packaging quality detection, and provides a gas content detection device and method for a packaging bag, and the device comprises a detection rack, a loading mechanism, and a first range finder. Wherein the loading mechanism comprises a first driving assembly, a bottom plate and a pressing plate and is used for driving the bottom plate and the pressing plate to move relatively, and the first distance measuring instrument is used for detecting the displacement of the bottom plate. Furthermore, the equipment further comprises an air tightness detection mechanism, the air tightness detection mechanism is composed of a detection box, a negative pressure source and a second distance measuring instrument, the interior of the detection box can be vacuumized, and the height of the packaging bag in the box can be detected. In addition, the detection box is provided with a feed port and a discharge port, and is equipped with a positioning clamp and a transmission mechanism, so that efficient and accurate gas content detection is realized. The effects of improving the detection precision and reducing the operation complexity are achieved.

The utility model belongs to the technical field of concrete detection, and particularly relates to a concrete gas content tester, which comprises a tank body, a cover and a fixing device, the cover is positioned on the upper surface of the tank body, and the upper surface of the cover is fixedly connected with a barometer; the fixing device is arranged on the surfaces of the tank body and the cover and comprises two placement plates, the two placement plates are located on the two sides of the tank body, the surfaces of the tank body and the cover are sleeved with two lantern rings, moving blocks are fixedly connected to the positions, close to the placement plates, of the bottom ends of the lantern rings, guide rods are fixedly connected to the inner surfaces of the placement plates, and a placement device is arranged on the surface of the tank body; the placing device comprises a fixing ring and a gasket, the fixing ring sleeves the surface of the tank body, the side wall of the fixing ring is fixedly connected with a base plate, and the gasket is located on the upper surface of the base plate; by arranging the whole device, the cover and the tank body can be conveniently fixed together, the situation that operation is tedious during traditional fixing operation is reduced, and therefore the mounting and dismounting efficiency is improved.

The invention provides a slurry bed reactor with uniform gas holdup distribution, which comprises: a cylinder, which is internally provided with an accommodating cavity and is provided with a feed inlet, a gas inlet, a gas outlet and a liquid outlet which are communicated with the accommodating cavity; the gas distributor is arranged in the accommodating cavity, is close to the gas inlet and is circumferentially connected with the inner wall of the accommodating cavity; the plurality of gas holdup distribution adjusting devices are erected in the accommodating cavity on one side, facing the gas outlet, of the gas distributor, each gas holdup distribution adjusting device comprises a gas inlet part, a liquid inlet part, a mixing part and a gas exhaust part, the gas inlet parts, the mixing parts and the gas exhaust parts are sequentially communicated, the gas inlet parts are arranged towards the gas inlet, and the diameters of the cross sections of the gas inlet parts are gradually increased in the direction towards the gas inlet; the air outlet part is arranged towards the air outlet, and the diameter of the cross section is gradually increased in the direction towards the air outlet; the liquid inlet part comprises a first connecting section and a second connecting section which are communicated, the extending direction of the first connecting section is parallel to the connecting line direction of the air inlet and the air outlet, and one end, deviating from the first connecting section, of the second connecting section is communicated with the mixing part.

The present application relates to gas-liquid mixing reaction technical field, specifically to a kind of gas-liquid jet bubbling reactor, including reactor, distribution unit one, distribution unit two and adjusting unit.The size ratio between branch pipe one and reactor diameter is set in the present application, and the uniformity of gas bubble after pumping out is improved by increasing the number of branch pipe two and the uniform distribution of gas outlet hole, the gas holdup in unit area is improved, the problems of bubble coalescence effect and low shearing bubble efficiency are reduced, so as to improve the mass transfer efficiency between final gas and liquid;By setting the angle of gas outlet hole to 45 degrees, an inverted V-shaped pumping area is formed in the front-to-back direction, which improves the gas coverage range, i.e., the gas holdup in unit area, and the angle of gas outlet hole can be adjusted to adapt to different reaction volume requirements, and the gas outlet holes are distributed staggered, reducing the probability of coalescence reaction between bubbles generated by adjacent gas outlet holes, improving the uniformity of bubble distribution and the final mass transfer efficiency.

The embodiment of the invention provides a small package sealing forming machine and a packaging method, and relates to the technical field of new energy powder packaging equipment.The small package sealing forming machine comprises a box body assembly, a first switch structure and a second switch structure, the box body is provided with a containing cavity, the containing cavity is provided with a first opening and a second opening, and the first opening and the second opening are communicated through the first opening and the second opening; the first switch structure is used for controlling opening and closing of the first opening, and the second switch structure is used for controlling opening and closing of the second opening; the bag clamping and conveying device is arranged on one side of the box body, and the bag clamping and conveying device is used for conveying packaging bags into the containing cavity; the heat sealing assembly is arranged in the containing cavity, and the heat sealing assembly is used for conducting heat sealing on the packaging bag located in the containing cavity; the vacuum system is communicated with the containing cavity and used for controlling the vacuum degree of the containing cavity. According to the embodiment of the invention, the gas in the packaging bag can be exhausted, so that the gas content in the packaging bag is reduced.