463 results about "Nitrogen cylinder" patented technology

The invention discloses a method and a device for preparing high-purity molybdenum hexafluoride. The preparation method comprises the following steps: (1) preheating nitrogen trifluoride; (2) carrying out contact reaction on nitrogen trifluoride and metal molybdenum in the reactor; (3) settling the gas product through a settling tank to remove particulate matters, and collecting crude molybdenum hexafluoride gas; (4) introducing the molybdenum hexafluoride crude gas into an adsorption tower, and adsorbing to remove hydrogen fluoride; and (5) collecting a molybdenum hexafluoride finished product, and repeatedly heating, freezing and vacuumizing to remove low-boiling-point impurities to obtain the molybdenum hexafluoride product with the purity not lower than 99.996%. A nitrogen trifluoride steel cylinder, a mass flow controller, a nitrogen trifluoride preheater, a first reactor, a second reactor, a third reactor, a settling tank, a crude product storage tank, an adsorption tower and a finished product storage tank are sequentially connected, wherein the third reactor is formed by connecting three reaction containers in series; the adsorption tower is formed by connecting two stages of towers in series, and the adsorption tower is filled with sodium fluoride.

The invention relates to the technical field of hydraulic control, and provides a pump-controlled semi-active ship heave compensation hydraulic system and a control method thereof.The system comprises an active compensation hydraulic module, a passive compensation hydraulic module, a sensor module, a controller and a motion sensor; the passive compensation hydraulic module comprises a nitrogen cylinder unit, an energy accumulator unit, a gas-liquid converter, a seventh electromagnetic directional valve, a fourth electromagnetic directional valve and a passive compensation asymmetric hydraulic cylinder; the active compensation hydraulic module comprises a third energy accumulator, a servo motor, a two-way quantitative hydraulic pump, a first one-way valve, a second one-way valve, an active compensation asymmetric hydraulic cylinder, a first electromagnetic reversing valve, a second electromagnetic reversing valve and a third electromagnetic reversing valve. According to the invention, passive compensation and active compensation are fused, so that the compensation precision and efficiency are greatly improved; and an electro-hydraulic servo pump control mode is adopted, so that the advantage of high control precision of a valve control mode is reserved, and the stability is also improved.

The invention relates to a high-nitrogen steel preparation method capable of efficiently and accurately increasing nitrogen through pressurized gas phase nitriding and bottom blowing nitrogen, which comprises the following steps: filling a furnace chamber of a pressurized induction furnace with first target nitrogen pressure, and entering a molten steel surface gas phase nitrogen increasing stage; and then pressurizing and bottom blowing nitrogen, controlling the pressure of the bottom blowing nitrogen by adjusting the output pressure of a nitrogen cylinder, controlling the bottom blowing flow, and entering a pressurized gas phase nitriding and bottom blowing nitrogen increasing stage. And then pressurizing bottom nitrogen blowing is stopped, second target nitrogen pressure needed by casting continues to be filled into the furnace cavity of the pressurizing induction furnace, and the molten steel surface gas phase nitrogen increasing stage under the casting nitrogen pressure enters. By combining the bottom blowing nitrogen, the nitrogen increasing efficiency is improved, the preparation period is greatly shortened, and therefore the production efficiency of the high-nitrogen steel is improved. Besides, the nitrogen pressure, the bottom blowing flow and the nitrogen increasing amount are accurately controlled in stages, dynamic prediction is carried out in combination with a calculation formula, accurate control over the liquid nitrogen content of the steel is achieved, and the requirements of different high-nitrogen steel products are met.

The invention discloses an explosive granulation system based on nitrogen circulation, the explosive granulation system comprises an enclosed hood, a granulation main machine, a material receiving device and a conveying device, the output end of the granulation main machine, the material receiving device and the conveying device are all located in the enclosed hood, and an oxygen sensor is arranged in the enclosed hood; an air inlet and an air outlet are formed in the closed cover, the air outlet is sequentially communicated with the first wind power supply device, the condenser, the first heater, the second wind power supply device and the air inlet, an outlet of the nitrogen cylinder is further communicated between the condenser and the first heater, and the air inlet and the air outlet are provided with a first temperature sensor and a second temperature sensor respectively. According to the invention, the nitrogen in the nitrogen cylinder can be heated by the first heater and then supplied into the enclosed hood by the second wind power supply device, so that ethyl acetate in the enclosed hood is absorbed and supplied to the condenser by the first wind power supply device, and the ethyl acetate carried by the nitrogen is condensed and recovered; further, ethyl acetate is removed in the press-fitting explosive granulation process.

The utility model discloses a high-pressure inflation pipeline structure wound on an IV-type hydrogen storage cylinder inner container, which comprises a nitrogen cylinder, the output end of the nitrogen cylinder is sequentially connected with a high-pressure reducing valve, a one-way valve, a low-pressure reducing valve, a pressure release valve, a pressure gauge and a stop valve through a high-pressure connecting pipe, and the stop valve is connected with the IV-type hydrogen storage cylinder inner container. The high-pressure inflation pipeline is provided with the high-pressure reducing valve, the one-way valve, the low-pressure reducing valve, the pressure release valve, the pressure gauge and the stop valve, so that the functions of monitoring, adjusting and pressure release of the internal pressure during winding of the IV-type hydrogen storage cylinder liner can be realized, and the problem that the IV-type hydrogen storage cylinder liner is expanded and broken due to overlarge pressure or insufficient support due to oversmall pressure during winding and inflation is avoided; and the normal use and the use safety of the IV-type hydrogen storage bottle liner winding are ensured.

The utility model discloses a treatment device capable of accelerating starting of autotrophic denitrification of pyrite, and belongs to the technical field of sewage treatment. The Fe < 3 + > dosing unit comprises a Fe < 3 + > dosing tank (4) and a dosing pump (6); according to the water inlet unit, an aeration head (2) is arranged in a raw water tank (3), the aeration head (2) is connected with a nitrogen cylinder (1) through a valve, filler filled in the reactor is modified pyrite filler particles and modified ceramsite, the bottom of the reactor is connected with an aeration pump, and a Fe < 3 + > dosing tank (4) is connected with a water inlet (7) in the bottom of the reactor (13) through a dosing pump (6). The method comprises the following steps: aerating sludge, standing, discharging water, and adding ferric iron into the water subjected to nitrogen aeration treatment to carry out accelerated reaction. By adopting the technology of the utility model, the starting can be quickly carried out for more than 10 days.

The invention belongs to the technical field of gas pipe networks, and particularly relates to a performance test system and method based on an urban gas pipe network connecting piece and key equipment sealing material in a hydrogen-doped environment. The system comprises a hydrogen cylinder, a natural gas cylinder, a gas mixing tank, a compressor, a horizontal stainless steel tank, an electric tracing band, a pressing sheet clamping device, a prestress loading measuring device, a hanging sheet clamping device, a pressure transmitter, a thermocouple temperature transmitter, a computer, a nitrogen cylinder, a flame arrester and a hydrogen concentration detector. The hydrogen cylinder and the natural gas cylinder are respectively communicated with the gas mixing tank, an outlet of the gas mixing tank is communicated with the horizontal stainless steel tank after passing through the compressor, and the nitrogen tank is respectively communicated with the horizontal stainless steel tank, the hydrogen cylinder and the natural gas cylinder; an electric tracing band, a pressing sheet clamping device, a prestress loading measuring device, a hanging sheet clamping device, a pressure transmitter and a thermocouple temperature transmitter are arranged in the horizontal stainless steel tank. The system achieves the purpose of constant temperature control.

The utility model relates to the field of perovskite cell related equipment, and provides a passivated perovskite film coating device and a perovskite cell preparation system. The passivated perovskite film coating device comprises a base table, an air knife mechanism, a nitrogen cylinder and an additive atomizer, a sliding mechanism is arranged on the base table, the air knife mechanism is slidably installed on the base table through the sliding mechanism, the nitrogen cylinder is provided with a nitrogen pipe, the additive atomizer is provided with an additive air pipe, and the top of the air knife mechanism is connected with a mixed air inlet pipe. An air outlet of the nitrogen pipe and an air outlet of the additive gas pipe are respectively communicated with the mixed gas inlet pipe. According to the passivated perovskite film coating device, the additive atomizer is used for atomizing a solution in which an additive is dissolved so that the solution can become gas, nitrogen and the atomized gas of the additive are mixed and then discharged from the air knife lip, and in the process that the air knife mechanism conducts blowing treatment on a liquid film, the liquid film can be blown out through the air knife. And doping of the additive to the perovskite or passivation treatment of the passivator to the surface of the perovskite is completed.

The invention relates to a multifunctional integrated liquid cooling plate testing machine which comprises a cabinet body, a testing inlet pipe and a testing outlet pipe which are used for being connected with a liquid cooling plate are arranged on the cabinet body, a pure water tank and a nitrogen cylinder are arranged in the cabinet body, a first liquid outlet and a first liquid return opening are formed in the pure water tank, the first liquid outlet is communicated with the testing inlet pipe through a first pipeline, and the first liquid return opening is communicated with the testing outlet pipe through a second pipeline. The first liquid return port is communicated with the test outlet pipe through a second pipeline, the first pipeline is provided with a variable frequency circulating pump, the nitrogen cylinder is communicated with a third pipeline, the third pipeline is connected with the first pipeline through a first stop valve, the first stop valve is communicated with a fourth pipeline, and the fourth pipeline is connected with the second pipeline through a first three-way valve. The first pipeline, the second pipeline, the third pipeline and the fourth pipeline are provided with a cleanliness testing assembly, a thermal resistance testing assembly and an air tightness testing assembly. The liquid cooling plate testing device has the effect of realizing integrated testing of the liquid cooling plate.

The present invention provides a nitrogen purge device for purging the mirror surface of a spectrometer detector, the nitrogen purge device comprising a nitrogen bottle, an air inlet pipe connected to the nitrogen bottle, a one-inlet-two-outlet valve whose air inlet end is connected to the air inlet pipe, a purge air path connected to one air outlet end of the one-inlet-two-outlet valve, and a pressure-limiting check valve connected to the other air outlet end of the one-inlet-two-outlet valve, wherein the purge air path is arranged away from one end of the one-inlet-two-outlet valve toward the mirror surface of the spectrometer detector. The nitrogen purge device of the present invention can start the spectrometer detector after the air in the air inlet pipe is exhausted by arranging the one-inlet-two-outlet valve and the pressure-limiting check valve. The nitrogen purge device of the present invention can better protect the spectrometer detector, while saving the time of the staff and avoiding the waste of nitrogen.

The invention belongs to the technical field of metal material and coating performance detection, and particularly relates to a high-pressure hydrogen permeation testing device and method.The testing device comprises a gas phase system and an electrochemical testing system, and the gas phase system comprises a high-pressure kettle, a hydrogen cylinder, a nitrogen cylinder and a vacuum treatment device; the autoclave is sealed and communicated with the hydrogen cylinder, the nitrogen cylinder and the vacuum treatment device; a first test port is formed in the upper part of the autoclave; the electrochemical testing system comprises an electrochemical workstation and an electrolytic tank; the electrolytic tank is connected to the upper part of the autoclave; the electrolytic tank is provided with a reference electrode and an auxiliary electrode, the lower part of the electrolytic tank is provided with a second test port, and the first test port and the second test port are connected with closed rubber rings and jointly clamp a sample to be tested through the closed rubber rings; the electrochemical workstation is electrically connected with the auxiliary electrode, the reference electrode and the to-be-tested sample, so that the service condition of the to-be-tested sample can be accurately simulated, the hydrogen permeation process in the actual working condition can be more truly reflected, and the accuracy of a hydrogen permeation test experiment is improved.

The invention discloses a lithium ion battery cabin oxygen concentration control system, and relates to the technical field of fire fighting. The oxygen concentration control system comprises an oxygen concentration sensor, a nitrogen making machine, a nitrogen station, an air compressor, a compressed air storage tank, a high-temperature-resistant and high-pressure-resistant seamless steel pipe, a one-way valve, a PLC (Programmable Logic Controller), a gas replacement indicator lamp, a lithium ion battery cabin and a battery cabin air inlet and exhaust flow control regulating valve. The controller is respectively connected with the oxygen concentration sensor, the nitrogen station, the compressed air storage tank, the lithium ion battery cabin air inlet and exhaust flow control regulating valve and the gas replacement indicator lamp. The nitrogen station is provided with a purging pressure measuring valve and a nitrogen cylinder head valve, and the high-temperature-resistant and high-pressure-resistant seamless steel pipe is connected with the nitrogen making machine, the nitrogen station, the lithium ion battery cabin, the air compressor and the compressed air storage tank. The lithium ion battery cabin is filled with high-purity nitrogen through the oxygen concentration control system, so that gas in the cabin is replaced, and controllable adjustment of an inerting environment in the cabin is realized. In addition, after the battery is subjected to thermal runaway, high-purity nitrogen is filled into the lithium ion battery cabin, thermal runaway flue gas in the cabin is quickly purged and replaced, and then an electric ball valve is linked to start air replacement, so that the air environment of the experiment cabin is kept.

The utility model discloses a quality detection device for automobile shock absorber machining, and relates to the technical field of automobile shock absorber machining, the quality detection device comprises a detection box body and a water tank, and further comprises a weather simulation assembly, and the weather simulation assembly comprises a heated assembly and a cooling assembly; the heated assembly comprises a heater fixed outside the detection box body, and the air outlet end of the heater penetrates into the detection box body through an air outlet pipe and then is fixedly communicated with a runway heating ring; the cooling assembly comprises a nitrogen cylinder fixed outside the detection box body, and the gas outlet end of the nitrogen cylinder penetrates into the detection box body through a gas outlet pipe and then is fixedly communicated with a runway cooling ring; the problems that in the prior art, when the sealing performance of the automobile shock absorber is detected at normal temperature, an automobile may run in an extreme weather environment such as an extreme high-temperature environment and an extreme low-temperature environment in an actual situation, so that the extreme environment temperature needs to be simulated when the automobile shock absorber is detected, and the detection time is shortened are solved. And the problem of detecting the automobile shock absorber is solved.

The invention discloses a cooling system deoxygenization device and method, and relates to the technical field of pure water deoxygenization, the cooling system deoxygenization device comprises a purging gas system composed of a nitrogen cylinder and an electromagnetic valve which are sequentially connected through a pipeline, and a vacuum system composed of a water ring vacuum pump, a gas-liquid separator and a plate heat exchanger which are sequentially connected through a pipeline, the circulating water system is composed of a first electric two-way valve and a deoxygenization membrane assembly which are sequentially connected through a pipeline, and the control device controls the purge gas system, the vacuum system and the circulating water system to achieve automatic deoxygenization of the converter valve cooling system. The method has the beneficial effects that an on-line deoxidization method or an off-line deoxidization method can be provided for the converter valve cooling system, when the on-line deoxidization method is adopted, the deoxidization device automatically operates for deoxidization, manual operation is not needed, and the full-automatic and real-time deoxidization requirements of the cooling system are met; in the off-line method, the deoxidizing device can be used as a tool as required, and the two modes are combined to meet the use requirements of different occasions.

The invention provides sampling equipment for lithium ore flotation tailing recovery and a resource recovery method, and relates to the technical field of recovery sampling, the sampling equipment comprises a mounting frame, a movable sampling mechanism, an adjusting gear and an inerting protection mechanism; the movable sampling mechanism comprises a sliding rail, a movable seat, a rotating seat and a sampling cup, the movable seat is slidably connected with the sliding rail, the rotating seat is fixedly arranged at the top of the movable seat, the inner side of the rotating seat is rotatably connected with a rotating shaft, the front end of the rotating shaft is fixedly connected with the sampling cup, and the sampling cup is fixedly connected with the movable seat. And the rear end of the rotating shaft is fixedly connected with the adjusting gear. According to the scheme, nitrogen in the nitrogen cylinder is finally sprayed out through the hose and the spray head, a nitrogen curtain is formed at the sampling end of the sampling cup, amine substances in foam are prevented from being oxidized by air, the viscosity of a foam sample is prevented from being sharply reduced, and the accuracy and representativeness of foam viscosity detection data are improved; the use amount of the amine medicament can be adjusted in a targeted manner, and the polluted water body can be treated.

A device and method for preparing high-purity metals by vacuum distillation and bidirectional step condensation, the device comprising an atmosphere control device, a vacuum distillation device, a charging device, an intelligent control device, and an exhaust gas treatment device. The atmosphere control device comprises a nitrogen bottle and a control valve located above the bottle mouth for controlling the opening and closing of the nitrogen bottle. The vacuum distillation device comprises a vacuum distillation device and a vacuum pump connected to the vacuum distillation device via a pipeline. The charging device is located in the middle of the vacuum distillation device, and the intelligent control device is connected to the vacuum distillation device. The exhaust gas treatment device comprises an impurity removal device. The vacuum distillation device is provided with a plurality of heaters, which are arranged in parallel along the length direction of the charging device and the condensation zone on both sides of the vacuum distillation device. The present invention also includes a method for preparing high-purity metals using the device. The device of the present invention has a simple structure, is not restricted by the gravity field, is convenient for sampling, and has high impurity removal efficiency.

This invention relates to the field of fire door technology, specifically a smoke-blocking fire door, including a fire door frame, a fire door body mounted on the fire door frame via hinges, a door closer connected to the top of the fire door frame at the top, a handle mounted on the fire door body, and a smoke-blocking device mounted on the fire door body. The smoke-blocking device comprises a housing, a shaking device, a plate, a foam bottle, a nitrogen cylinder, pipes, a connector, and a metal tube. This invention injects foam between the fire door frame and the fire door body. The foam from the foam bottle is injected into the space between the fire door body and the fire door frame through the metal tube. The foam expands upon contact with air, filling and sealing the space between the fire door body and the fire door frame, preventing smoke from a fire from spreading upwards through the stairwell.

The invention discloses a shock absorber, a shock absorption method and a vehicle, and relates to the field of shock absorption devices. The shock absorber comprises an oil storage barrel. One end of the piston rod penetrates into the oil storage barrel from the open end of the oil storage barrel; the side wall of the piston rod and the opening of the oil storage barrel are sealed; an oil passing hole formed in the axial direction of the piston rod is formed in the piston rod; the main piston valve system is movably arranged in the oil storage barrel and divides the oil storage barrel into a first cavity and a second cavity, and the main piston valve system is fixedly connected with the end, located in the oil storage barrel, of the piston rod; one end of the nitrogen cylinder is connected with the end, away from the oil storage cylinder, of the piston rod through a connecting assembly. When the piston rod moves in the oil storage barrel in a reciprocating mode in the axial direction of the piston rod, part of oil in the oil storage barrel can be transferred between the first cavity and the second cavity through the main piston valve system, and the other part of oil in the oil storage barrel can be transferred between the first cavity and the nitrogen barrel through the oil hole. According to the shock absorber, the shock absorption method and the vehicle, the heat dissipation efficiency can be improved.

The invention discloses a laser cladding device and a cladding method, and relates to the technical field of laser cladding, the laser cladding device comprises a fence, a six-axis industrial robot is arranged in the middle of the inner side of the fence, and a laser cladding head is fixedly arranged on an end effector of the six-axis industrial robot; an air feeder, a water cooler, a laser and an electrical cabinet are sequentially arranged on the left side of the six-axis industrial robot from back to front, and a nitrogen cylinder, a robot control cabinet and a console are sequentially arranged on the right side of the six-axis industrial robot from back to front; and a workbench is arranged under the laser cladding head, a positioning mechanism is arranged at the top of the workbench, and a base body stored material output mechanism is arranged on the left side of the positioning mechanism. Feeding, discharging, positioning and positioning releasing of the base body can be automatically completed, the automation degree is higher, labor is saved, meanwhile, the time needed by operation is shortened, the overall laser cladding efficiency of the base body is improved, and the laser cladding device can be suitable for industrial laser cladding machining of the same base body in a large scale.

The invention discloses a lunar dust interference effect test platform suitable for a vacuum environment and a use method of the lunar dust interference effect test platform, and relates to the technical field of aerospace engineering ground simulation tests.The platform comprises a vacuum container system, a measuring system and a dustproof system; maintaining the normal-pressure and normal-temperature working state of the camera; the measurement system integrates a P IV camera, three high-speed cameras and a heat flow sensor, and realizes the multi-dimensional measurement of the moony dust excitation height / speed / impact range, the erosion pit three-dimensional reconstruction and the engine aerodynamic heat effect. The dustproof system adopts a high-transmittance acrylic dustproof cover and a vacuum gauge for differential pressure monitoring, so that lunar dust is prevented from polluting the heat sink, and the safety of the cover body is protected. The problems of pollution and single measurement of a vacuum system in the prior art are solved, multi-physical-quantity collaborative testing is achieved, key test data are provided for design of the lunar lander, and the method has engineering application value.

The invention discloses a nitrogen shock absorber and a shock absorption method thereof, and relates to the technical field of shock absorbers, the nitrogen shock absorber comprises an oil storage barrel, a piston rod, a lower connecting seat, an upper connecting seat, a central fixing pipe, a piston valve system assembly and a compression hydraulic buffer assembly; the piston rod is slidably connected with the oil reservoir; the lower connecting seat is fixed at one end of the piston rod; the upper connecting seat is mounted at one end of the oil storage cylinder, and a compression hydraulic buffer regulating valve system assembly, a compression high-low speed regulating valve system assembly and a nitrogen cylinder are mounted on the upper connecting seat; the center fixing pipe is fixed to the end, located in the oil storage barrel, of the piston rod. The piston valve system assembly is fixed to the outer wall of the center fixing pipe and divides the interior of the oil storage barrel into a recovery cavity and a compression cavity. The compression hydraulic buffering assembly comprises a hydraulic buffering rod, and the hydraulic buffering rod is communicated with the compression hydraulic buffering adjusting valve system assembly. The performance of the compression hydraulic buffering system is improved, the hydraulic buffering stroke is increased, and the purpose of progressive damping hydraulic buffering is achieved.

The foam scrubbing agent performance detection device comprises a nitrogen cylinder, a pressure reducing valve is arranged at a bottle opening of the nitrogen cylinder, the outlet end of the nitrogen cylinder is connected with a first high-pressure hose, and the end, away from the nitrogen cylinder, of the first high-pressure hose is fixedly connected with a first metal pipe with the same pipe diameter; the first metal pipe is connected with a columnar foam generator with an open top end, a second metal pipe is inserted into the top end of the foam generator and connected with a second high-pressure hose with the same pipe diameter, and the end, away from the second metal pipe, of the second high-pressure hose is connected with a liquid storage container; according to the invention, after the formation water sample is taken from the gas well mouth, the performance of the foam scrubbing agent can be quickly detected at the gas well mouth, the performance of the agent can be quickly and accurately evaluated, the evaluation result error caused by using simulated formation water and old formation water is avoided, the model selection and filling of the gas well foam scrubbing agent are guided, and the applicability of the foam scrubbing agent is ensured; and the foam drainage gas recovery process effect is effectively improved.

The present invention relates to the field of hydraulic control technology, and provides a pump-controlled semi-active ship heave compensation hydraulic system and a control method thereof, wherein the system comprises: an active compensation hydraulic module, a passive compensation hydraulic module, a sensor module, a controller and a motion sensor; the passive compensation hydraulic module comprises a nitrogen bottle unit, an accumulator unit, a gas-liquid converter, a seventh electromagnetic reversing valve, a fourth electromagnetic reversing valve and a passive compensation asymmetric hydraulic cylinder; the active compensation hydraulic module comprises a third accumulator, a servo motor, a bidirectional quantitative hydraulic pump, a first check valve, a second check valve, an active compensation asymmetric hydraulic cylinder, a first electromagnetic reversing valve, a second electromagnetic reversing valve and a third electromagnetic reversing valve. The present invention integrates passive compensation and active compensation, greatly improving the compensation accuracy and efficiency; adopting an electro-hydraulic servo pump control method not only retains the advantages of high control accuracy of the valve control method, but also improves stability.

The invention discloses a device and a method for testing degradation and dissolution quantity of ion exchange resin, and relates to the field of performance testing of ion exchange resin. An inlet of a peristaltic pump is communicated with a liquid outlet of a liquid inlet box, an outlet of the peristaltic pump is communicated with an inlet of a temperature control heater, the upper end of an exchange column is communicated with an outlet of the temperature control heater, and the lower end of the exchange column is connected with a liquid storage box; the liquid storage tank is connected with the second gas collector, and the nitrogen cylinder gas conveying pipe penetrates into the liquid storage tank. Water washing or pretreatment is completed before testing, then heating temperature is set according to operation conditions, demineralized water or treating fluid is introduced into an exchange column, when gas-phase degradation products need to be collected, the gas-phase degradation products are collected through a first gas collector and a second gas collector, and if the sample is anion exchange resin, high-purity nitrogen is introduced into a liquid storage tank through a nitrogen cylinder, and the sample is collected through a second gas collector. The volatile organic matter is purged into a second gas collector, and finally the degradation and dissolution amount of the ion exchange resin is calculated according to TOC or chemical oxygen demand, the concentration of methanol and trimethylamine and the content of sulfate radicals or ammonia nitrogen.

The present application relates to a kind of high temperature high pressure formation fluid containing large hole fracture plugging simulation device, including nitrogen bottle, liquid storage tank, simulation wellbore, heating insulation cover, back pressure valve and hole fracture isolation plate, there is inner cylinder in upper kettle body, there is simulation leakage layer in inner cylinder, upper kettle body and lower kettle body are connected by flange, hole fracture isolation plate is set between upper kettle body and lower kettle body, back pressure valve is set at the place close to hole fracture isolation plate of lower kettle body, heating insulation cover is set on the outer wall of upper kettle body and lower kettle body.The simulation method for high temperature high pressure formation fluid containing large hole fracture plugging using the above device, including: plugging slurry is discharged or passed through formation fluid and then enters simulation leakage layer;The plugging effect of conventional drilling fluid on small hole fracture leakage layer is judged by the pressure difference of upper kettle body and lower kettle body;The breakthrough pressure of sealing zone is obtained by the pressure difference between upper kettle body and lower kettle body after sealing zone is formed by solidified cementation type plugging slurry.The present application is in line with actual downhole, easy and fast to operate, provides platform and means for the plugging research of formation fluid containing large hole fracture leakage layer.

The utility model discloses a rotating automatic lifting nitrogen charging device which comprises a rotating shaft, a rotating gas distribution assembly, a connecting sleeve and a rotating disc, and the rotating gas distribution assembly, the connecting sleeve and the rotating disc are coaxially installed on the rotating shaft from top to bottom and attached to each other. A cam mechanism is coaxially and fixedly arranged outside the fixed gas distribution disc, the movable gas distribution disc is fixedly connected with the rotating disc through a connecting sleeve, a plurality of nitrogen charging parts are evenly installed on the rotating disc in the circumferential direction, a gas inlet of the rotating gas distribution assembly communicates with an external nitrogen cylinder, a gas outlet of the rotating gas distribution assembly communicates with gas inlets of the nitrogen charging parts, and the nitrogen charging parts elastically penetrate through the rotating disc in the longitudinal direction. And the top is in transmission fit with the cam mechanism and is suitable for lifting up and down under the action of the cam mechanism. The nitrogen charging part can automatically ascend and descend in the rotating process, so that the nitrogen charging part can automatically extend into a bottle to be charged with nitrogen, collision with the bottle can be avoided, meanwhile, the requirement for the nitrogen charging amount of a product is met, and the qualified rate of the product is guaranteed.

The invention relates to a hydrate separation system, device and method for mixed gas obtained after precooling of a low-temperature storage tank. The hydrate separation system is composed of an LNG storage tank, a hydrate reaction collector, a nitrogen gas cylinder, a nitrogen storage tank, a methane storage tank, a data acquisition processor and the like. According to the invention, the hydrate method is innovatively utilized to efficiently separate the pre-cooled mixed gas, so that the separation efficiency of the mixed gas is improved; the hydrate reaction collector is composed of a twisted belt type spiral flow generator, a microbubble generator, a reaction accelerant bottle, a constant-temperature water bath device and the like, and high air suction capacity and high reaction efficiency can be ensured; a hydrate method is utilized to efficiently separate mixed gas pre-cooled by the low-temperature storage tank, so that the cold energy of the system is fully utilized, the energy consumption is reduced, and the cost is reduced; compared with a common mixed gas recycling method, an automatic control system is adopted, intelligent control over the steps of hydrate generation, decomposition, separated gas collection and the like is achieved, the labor cost is saved, and energy consumption is reduced; the investment and operation cost is low.

The invention discloses a closed hydraulic cylinder lifting compensation system for an ocean drilling rig, which comprises a drilling rig derrick, a lifting hydraulic cylinder is arranged on the drilling rig derrick, a lifting pulley block is arranged at the driving end of the lifting hydraulic cylinder, and a lifting hook is wound on the lifting pulley block; the drilling machine derrick is further provided with a compensation energy accumulator, a nitrogen cylinder set, a main hydraulic station and an energy storage power distribution unit. The invention further discloses a control method for the implementation mechanism of the closed hydraulic cylinder lifting compensation system for the ocean drilling rig. The hydraulic cylinder lifting system solves the problem of valve control heating of an existing hydraulic cylinder lifting system, the problem that equipment complexity is increased by an additional drill column compensation device and the problem of lowering potential energy recycling.

The invention discloses a nitrogen shock absorber and a design method of a connecting seat thereof, and relates to the technical field of connecting seats, the first end of a nitrogen cylinder module is connected with the first end of the connecting seat, the second end of the connecting seat is connected with the first end of a piston rod module, and a floating piston assembly is arranged in the nitrogen cylinder module; the position, corresponding to one side of the floating piston assembly, of the nitrogen cylinder module is used for storing nitrogen, the position, corresponding to the other side of the floating piston assembly, of the nitrogen cylinder module is used for introducing hydraulic oil, the first end of the piston rod module is used for being connected with a suspension, and the second end of the piston rod module extends into the oil storage cylinder module through the first end of the oil storage cylinder module. Hydraulic oil in the oil storage cylinder module can enter the nitrogen cylinder module through oil passing holes in the piston rod module and the connecting base, and the compression adjusting valve is installed on the connecting base and used for adjusting the flow resistance of the hydraulic oil passing through the oil passing holes. The damping device is simple in structure, good in damping performance and good in road condition adaptability.

This application relates to the field of fabric edge trimming technology, and in particular to a laser edge trimming device for printed fabrics. The device includes a worktable, a laser cutting device and a mounting plate mounted on top of the worktable. A cavity is provided in the middle of the mounting plate. The mounting plate is connected to a horizontal adjustment structure and a vertical adjustment structure. The horizontal adjustment structure is connected to the mounting plate, one end of the vertical adjustment structure is fixedly connected to the horizontal adjustment structure, and the other end of the vertical adjustment structure is connected to the laser cutting device. An air jet device is provided on one side of the mounting plate. The air jet device includes a nitrogen cylinder, an output pipe, and a high-pressure nozzle. The nitrogen cylinder is slidably connected to the mounting plate and is connected to the output pipe. The output pipe is connected to the high-pressure nozzle, which is located on one side of the laser cutting device. A dust collection device is provided on the other side of the mounting plate. The dust collection device includes a vacuum cleaner, a vacuum hose, and a vacuum hood. The vacuum hood is located on the other side of the laser cutting device and is connected to the vacuum hose. The vacuum hose is connected to the vacuum cleaner.