45 results about "Condenser (laboratory)" patented technology

The present application relates to air purification and precision instrument environment control technical field, provide a kind of for wafer film thickness detection laboratory Self-cleaning air conditioning equipment, comprising: sequentially arranged from top to bottom purification pipeline, base, sequentially installed with filter screen, non-woven filter bag, condenser, activated carbon filter plate one, electric heater and fan in the purification pipeline, the base is provided with replacement module, the two sides of the purification pipeline outer wall are provided with cleaning device one, and the purification pipeline is provided with cleaning device two at non-woven filter bag;The present application can filter some chemical gas generated in laboratory by activated carbon filter plate one, improve the effect of purification, the replacement of activated carbon filter plate one can be realized by replacement module, prolong the service life of equipment;Dust on filter screen is cleaned by cleaning device one;Non-woven filter bag is cleaned by cleaning device two, improve the self-cleaning effect of air conditioning equipment.

The invention belongs to the technical field of chemistry and chemical engineering experiments, and particularly relates to a double-effect condenser. The double-effect condenser comprises an outer heat exchange pipe, an upper connector, a lower connector, a cooling liquid inlet, a cooling liquid outlet and an inner heat exchange pipe which are integrally designed. The outer heat exchange tube is a double-layer coaxial straight sleeve; the upper connecting port and the lower connecting port are respectively welded on a conical ground glass tube, a glass ball grinding port, a glass bowl grinding port or a glass flange connecting port at the top and the bottom of the first-layer tube; the cooling liquid inlet and the cooling liquid outlet are straight connecting pipes or pagoda-shaped connecting pipes which are respectively welded on the outer wall of the first-layer pipe; the inner heat exchange tube is a double-layer coaxial straight sleeve or a single-layer tube which is coaxial with the outer heat exchange tube. The double-effect condenser has the advantages of being high in heat exchange efficiency and small in environmental influence, and has important significance on improving the environment of a chemistry and chemical engineering laboratory and promoting rapid development of healthy chemistry.

The utility model discloses a laboratory waste liquid recycling disposal system, which relates to the technical field of waste liquid disposal, and comprises an organic waste liquid incinerator and a neutralizing tank, a smoke outlet of the organic waste liquid incinerator is connected with a gas-liquid heat exchanger, a liquid storage cavity is arranged in the gas-liquid heat exchanger, a steam outlet of the liquid storage cavity is connected with a condenser, and the condenser is connected with the neutralizing tank. A liquid outlet of the condenser is connected with a UF filter element; a liquid inlet of the neutralization tank is connected with an acid storage tank and an alkali storage tank, a liquid outlet of the neutralization tank is communicated with a liquid inlet of the gas-liquid heat exchanger, and a filter and a heavy metal adsorption column are connected in series between the neutralization tank and the gas-liquid heat exchanger. According to the laboratory waste liquid recycling treatment system, the energy consumption can be reduced; meanwhile, the device can be suitable for treating organic waste liquid and inorganic waste liquid generated in a laboratory, environmental pollution is avoided, and experimental water is produced.

The utility model relates to the technical field of laboratory condensers, and discloses a novel shockproof condenser which is characterized in that an annular outer condensation pipe is sleeved on the outer side of an annular inner condensation pipe, and an annular gap is formed between the annular outer condensation pipe and the annular inner condensation pipe; the outer side of the annular outer condensation pipe is coated with the vacuum sleeve, and a vacuum cavity is formed between the vacuum sleeve and the annular outer condensation pipe; the water outlet threaded connector is arranged at the inlet ends of the annular outer condensation pipe and the annular inner condensation pipe and communicated with the annular outer condensation pipe and the annular inner condensation pipe. An auxiliary condensation area is formed through the annular gap between the annular outer condensation pipe and the annular inner condensation pipe, cooling liquid flows in the annular outer condensation pipe and the annular inner condensation pipe in parallel, heat exchange is carried out through the double-layer pipe wall and the external environment, the condensation contact area is obviously increased, and the condensation efficiency is improved.

The application discloses an energy-saving high-precision cascade rapid temperature regulating system for an enthalpy difference laboratory, and relates to the field of refrigeration and temperature regulation; the system comprises a first circulating system composed of a first condenser, a second evaporator, a first evaporator and a heat pump compression mechanism; a second circulating system composed of a second condenser, a third evaporator, a cooling tower and a refrigeration compression mechanism; heat absorption on the outdoor side through the first circulating system and heat release on the indoor side through the second circulating system, so that the energy-saving and rapid temperature regulating purposes are achieved; and through the most refrigerant flow path, the indoor side and the outdoor side of the enthalpy difference laboratory are rapidly and accurately regulated in temperature.

The invention discloses a preparation method of high-purity silane suitable for a small experimental device, which comprises the following steps: sequentially connecting and arranging a main reactor, a second reactor, a condenser, a silane buffer tank, a booster pump and a silane steel cylinder, and injecting hydrogen, nitrogen and silicon tetrafluoride materials into the main reactor after passing through the same mass flow controller; then the material enters a second reactor through a gas phase outlet pipeline at the top of the main reactor, a gas phase outlet at the top of the second reactor is connected with an inlet at the bottom of a condenser, an outlet of the condenser is connected with a silane buffer tank, and an outlet pipeline is arranged at the top of the silane buffer tank; materials enter the booster pump through the outlet pipeline, are pressurized in the booster pump and then are fed into the silane steel cylinder to be stored, so that the complexity of the reaction device is simplified, the energy consumption is reduced, and the problems of huge device size, complex process conditions and the like are solved.

The invention relates to the technical field of chemistry and chemical engineering experimental equipment, in particular to a high-speed distillation instrument which comprises a solvent evaporation system, a solvent condensation system and a controller which are associated with one another. The solvent evaporation system comprises a hot bath pool, an evaporation bottle, a two-way glass shaft, a locking mechanism, a driving motor and a steam guide bottle, and is used for evaporation of a volatile solvent and steam guide; the solvent condensing system comprises a bathing pool, a double-arm condenser, a cold liquid pump, an air pump and a collecting bottle and is used for condensing and recycling solvent steam; the controller is used for controlling the running states of the solvent evaporation system and the solvent condensation system, so that the volatile solvent is efficiently distilled and recycled in a closed environment in the high-speed distillation instrument. The high-speed distillation instrument provided by the invention has the beneficial effects that the bumping phenomenon of a rotary evaporator can be completely eradicated, and the high-speed distillation instrument has the advantages of high working efficiency, environment friendliness, high safety and the like.

The present application relates to a kind of long-term neutron irradiation caused concrete volume change determination device and method, the device includes: the neutron emitter and neutron receiver of matching setting in laboratory interior, test concrete test piece is fixed between neutron emitter and neutron receiver, test concrete test piece is measured temperature by temperature detector;Test chamber is equipped with control concrete test piece, control concrete test piece outside is wrapped up collection mould, setting condenser tube, water vapor collector and high-precision electronic scale.The method: one, the overall expansion rate of concrete test piece is determined by strain measuring device;Two, the self volume change of test concrete test piece in environment;Three, the volume change rate of concrete caused by neutron radiation is calculated in combination with the thermal expansion coefficient of concrete and the drying shrinkage of concrete;Four, the volume change rate of engineering structure shielding concrete with time is inferred by the relationship between the volume expansion rate of experimental concrete and neutron irradiation dose, to ensure the safety of nuclear engineering structure.

The utility model relates to a laboratory constant-temperature and constant-humidity air conditioning system which comprises more than two stages of compression refrigeration systems, every more than two stages of compression refrigeration systems form a group of systems, and condensers of the more than two stages of compression refrigeration systems of the same group of systems share heat exchange fins. The evaporators of the more than two stages of compression refrigeration systems of the same group of system correspond to each other in the air inlet direction and the air outlet direction; at least two sets of systems are arranged, and evaporators of the two sets of systems are correspondingly crossed. An electric heater is arranged in front of and / or behind the evaporator which is not closest to the air outlet side, and a temperature sensor and a temperature and humidity sensor are arranged in front of and / or behind the evaporator. More than two stages of compression refrigeration systems are paired into a group of systems, evaporators of the compression refrigeration systems of the same group of systems correspond to each other, and the evaporators of more than two stages are subjected to graded gradient detection and control temperature feedback by a plurality of temperature and humidity sensors under the monitoring action of a condensing pressure sensor and the adjusting action of an evaporation pressure adjusting valve. And high-precision constant-temperature control of air supply is ensured.

The invention relates to the technical field of chemistry and chemical engineering experiments, in particular to an environment-friendly organic comprehensive experiment platform which comprises an efficient distillation assembly, a column chromatography assembly, an extraction assembly, a decompression filtering assembly and a comprehensive control assembly. The efficient distillation assembly comprises a distillation bottle, a distillation head, a dustproof assembly, a flange clamp, a primary condenser, a secondary condenser, a liquid separator and a liquid receiving bottle, the column chromatography assembly comprises a solvent storage bottle, a chromatographic column and a leacheate receiving bottle; the extraction assembly comprises an extraction bottle, a sealing cover, a liquid extraction pipe and a filter barrel; the decompression filtering assembly comprises a solvent receiving bottle, a decompression funnel, a sealing cover and a pressure balancer; the comprehensive control assembly comprises a hot bathing pool, a cold bathing pool, a cooling liquid conveying pump, a solvent conveying pump, a circulating air pump, an air pressure adjusting pump, air pressure sensors A and B, stop valves A and B, a liquid level meter and a central controller. The method has important significance for improving the working environment of a laboratory and promoting the early realization of the dual-carbon target in China.

The utility model discloses a glass condenser which is internally filled with a plurality of condenser fillers, the condenser fillers are filled in the glass condenser, a condenser jacket is attached to the outer wall of the glass condenser, the upper end of the condenser jacket is provided with a water inlet, and the lower end of the condenser jacket is provided with a water outlet. Polytetrafluoroethylene sieve plates are arranged at the upper end and the lower end of the glass condenser. According to the novel glass condenser for the laboratory provided by the utility model, the condenser filler in the shape of the hollow glass column is filled in the condenser, so that the heat exchange area of the glass condenser can be greatly increased, and the condensation efficiency is effectively improved. Meanwhile, the glass condenser can be connected with other instruments or parts through the connecting clamping sleeve, the connecting bolt and the nut, so that the glass condenser and other instruments can be conveniently mounted, connected and detached, and condenser filler in the glass condenser can be conveniently detached; and the inner wall of the glass condenser and the condenser filler are convenient to clean.

The application provides a medical experiment gas mixer, which comprises a mixing box, an air inlet mechanism and a storage mechanism, air inlets and air outlets are arranged on the top and the side of the mixing box respectively, an adjusting valve is arranged at the air outlet, one end of the adjusting valve is communicated with the air outlet through a connecting pipe, the other end of the adjusting valve is provided with an air outlet pipe, a shockproof box and a vibration module are arranged in the mixing box, and a serpentine pipe condenser is arranged below the vibration module; the air inlet mechanism is arranged above the mixing box and comprises a gas conveying part, a gas container and an air inlet pipe arranged from bottom to top; the storage mechanism comprises a container box, and a plurality of mixing containers are arranged in the container box. The application solves the problem that the gas cylinder is affected by strong vibration, impact, proximity to a fire source, sunlight exposure, rain and water immersion, long storage time, temperature and humidity change and the like, thereby causing leakage and affecting the safety of the user.

The present invention belongs to the technical field of auxiliary tools for chemical experiments, and specifically relates to a vertical fixing device for an instrument. The vertical fixing device for the instrument utilizes a slide rail on the wall of a laboratory table to set up a crossbeam component, combined with the hanging components of a condenser and a flask, to innovatively achieve vertical fixation of the experimental instrument. The design of the condenser hanging component enables the condenser to be firmly attached, and the circular collar portion is provided with a notch to facilitate the arrangement of the water inlet and outlet of the condenser. The flask hanging component ensures that the round-bottom flask is located below the condenser, making full use of the space above the laboratory table, and effectively improving the utilization rate of laboratory space and the safety of experimental operations.

The application discloses a kind of concentration sample analysis and purification process of electronic grade hydrogen peroxide, the process is introduced into electronic grade hydrogen peroxide into ultrahigh purity container, in super-clean atmosphere, using the difference of hydrogen peroxide saturated vapor pressure at different temperatures, control concentration ratio 1:(10-1000), maintain non-boiling state by non-contact heating, combined with surface carrier gas device circulating air to keep laminar flow state, combined with the formation of superfluid medium film by passing into film-forming gas and control condition, 80%-90% impurities are adsorbed and settled, metastable saturated hydrogen peroxide is condensed and precipitated by condenser. Selecting the residual liquid or condensate, concentration sample analysis and purification can be achieved respectively, the metal ion mass content of the obtained ultrahigh purity electronic grade hydrogen peroxide is as low as 0.1 ppt or less, which can achieve high-ratio super-clean concentration analysis sample preparation and high-purity hydrogen peroxide purification effect, meet the needs of high-end fields such as laboratory and semiconductor manufacturing, and lay a foundation for mass production of G6 and G7 products.

The invention discloses a moxa stick combustion smoke absorption device and a GC-MS. The moxa stick combustion smoke absorption device comprises a gas supply unit used for providing combustion gas flow, a connecting pipe used for fixing a combusted moxa stick, a condensing pipe used for condensing moxa stick smoke and an absorption bottle used for absorbing volatile components in the smoke, the air supply unit comprises a combustion bottle, an air guide pipe and an air pump, the air pump is communicated with the combustion bottle through the air guide pipe, the connecting pipe is provided with three insertion openings, the insertion opening in one end is used for inserting moxa sticks and connected with one end of the condensation pipe, the insertion opening in the middle is connected with the combustion bottle, the other end of the condensation pipe is communicated with the absorption bottle, and an adjusting valve is arranged on the air guide pipe. The absorption liquid is directly fed into a GC-MS for detection. The device disclosed by the invention is simple in structure and low in cost, and can be quickly built and used under common laboratory conditions; and the airflow can be regulated and controlled, so that the stability and repeatability of the combustion process are ensured.

The utility model relates to the technical field of laboratory negative pressure desolventizing devices, in particular to a laboratory continuous feeding negative pressure desolventizing device which comprises a glass desolventizing kettle, the top end of the glass desolventizing kettle is connected with a straight condensation pipe, one end of the straight condensation pipe inclines downwards and is connected with a solvent receiving intermediate tank through a bent pipe distillation head, and the other end of the straight condensation pipe is connected with a vacuum pump. An intermediate tank bottom valve is arranged at the bottom end of the solvent receiving intermediate tank, a balance pipe is connected to the bottom end of the intermediate tank bottom valve, and a solvent bottle is connected to the bottom end of the balance pipe. According to the continuous feeding negative-pressure desolventizing device for the laboratory, the separation of boiling-point substances and high-boiling-point substances is greatly reduced under the vacuum degrees of different steps, and the residue of low-boiling-point substances in the high-boiling-point substances is lower than 50PPm; the continuous feeding can save the desolventizing time and improve the separation efficiency, the operation is simple, the solvent recovery adopts isolated receiving without stopping a vacuum system, the energy consumption of heating equipment is reduced, the health of experimenters is protected, and the working environment is protected.

The invention relates to a temperature control device (10-1, 10-2, 10-3) having a cooling circuit (20) with a refrigeration carrier, the cooling circuit (20) having a refrigeration source (22), a consumer heat exchanger (24) located in a return flow (22b) of the refrigeration source (22), and a pump (26), the refrigeration source (22) being part of a second heat exchanger (50), the consumer heat exchanger (24) being part of the return flow (22b) of the refrigeration source (22), and the pump (26) being part of the second heat exchanger (50). An external refrigeration circuit (60) is coupled with refrigerant to the cooling circuit (20) through the second heat exchanger (50), and the external refrigeration circuit (60) is provided with a compressor (62), a condenser (64) and a first throttling component (66).

The utility model discloses a pure water treatment device for a sucrose detection laboratory. The pure water treatment device comprises a tap water storage tank, a plurality of delivery pumps, a first buffer tank, a multi-stage multi-medium filter, a multi-stage activated carbon filter, a multi-stage reverse osmosis filter, a second buffer tank, an evaporation tank, a condensation tank and a third buffer tank, the tap water storage tank is communicated with the first buffer tank through a pipeline, and a delivery pump is arranged on the communicating pipeline; the first buffer tank is communicated with the first-stage multi-medium filter through a pipeline, and a delivery pump is arranged on the communicating pipeline; the multi-medium filter, the active carbon filter and the reverse osmosis filter are connected in series; the multi-stage multi-medium filters are connected in series; the multi-stage activated carbon filters are connected in series; and the multi-stage reverse osmosis filters are connected in series. A tap water storage tank is respectively connected with a multi-stage multi-medium filter, a multi-stage activated carbon filter and a multi-stage reverse osmosis filter in series, water subjected to reverse osmosis treatment is introduced into an evaporation tank through a pipeline, and the evaporation tank is communicated with a condensation tank, so that pure water of which the conductivity meets the detection requirement is prepared.

The invention discloses a distillation detection treatment device which comprises a closed box body, a heating distillation unit, a gas collection unit, a liquid collection unit, a negative pressure mechanism and a waste gas treatment mechanism. The box body is provided with a sealing door and a visible observation window; the heating distillation unit comprises an electric heater and a heating container, and the heating container is sequentially connected with a condenser, a liquid collection bottle and a gas collection bottle through a distillation pipeline; the negative pressure mechanism is used for maintaining a negative pressure state in the box and preventing gas leakage; and the waste gas treatment mechanism performs harmless treatment on the extracted gas and then discharges the gas. Harmful gas is fundamentally prevented from escaping through the closed negative pressure design, environment-friendly operation is achieved through integrated waste gas treatment, the safety, flexibility and automation degree can be further improved through the design of a modular treatment box, safety interlocking control, automatic fraction collection and the like, and the device is suitable for safe distillation pretreatment in a laboratory.

The invention discloses a double-layer glass reaction kettle, a reaction method and application of the double-layer glass reaction kettle in a laboratory, and relates to the technical field of glass reaction kettles.The double-layer glass reaction kettle comprises a rack, a kettle body and a condensing device, the kettle body and the condensing device are connected to the rack, and the condensing device is communicated with the kettle body and comprises a shell and a condensing coil arranged in the shell in a sleeved mode; the condensing coil comprises an inner coil body and an outer coil body, the bottoms of the inner coil body and the outer coil body are communicated, the inner coil body and the outer coil body are opposite in rotating direction, a threaded rod coaxial with the inner coil body is connected to the interior of the shell, homodromous threads are formed in the threaded rod, the distance between the homodromous threads and the inner coil body is consistent, and the threaded rod is in threaded connection with a cleaning frame. According to the double-layer glass reaction kettle, the reaction method and the application thereof in the laboratory, a liquid heat insulation layer can be prevented from being formed on the condensation pipe, and the effect of improving the efficiency of the condensation pipe is achieved.

The invention discloses a laboratory insulating oil miniature recovery device and method, and relates to the technical field of electrical equipment insulating oil recovery, the laboratory insulating oil miniature recovery device comprises a box body and a box cover, a control panel is arranged at an opening of the box body, an oil inlet is formed in the control panel, and an oil inlet pipe penetrates through the control panel to be connected to a primary filter; the oil outlet end of the primary filter is connected with a heating module through a primary filter oil pipe; the oil outlet end of the heating module is connected to a rotator in the oil-gas separator through a heating oil pipe; the bottom of the oil-gas separator is connected with an oil drain pump through an oil drain pipe, and the top of the oil-gas separator is connected with a condenser through an exhaust pipe. Through organic combination of heating, vacuum degassing and small-range closed-loop circulation, hydrogen, acetylene, air and moisture in oil are synchronously removed under the low-temperature heating condition, chemical additives and frequent replacement of consumables are not needed, and the device has the advantages of being compact in structure, easy and convenient to operate, good in regeneration effect, low in operation cost, environmentally friendly and free of pollution.

The utility model relates to the technical field of laboratory vacuum, and particularly provides a vacuum-degree-adjustable condensation separation device aiming at the problems that a vacuum pump is damaged due to the fact that the vacuum degree is not adjustable and gas phase condensation is incomplete in the negative pressure evaporation process, and the vacuum-degree-adjustable condensation separation device comprises an evaporation device, a buffer device and the vacuum pump which are sequentially connected. The buffering device comprises a buffering tank, an inner coil pipe type condensation pipe, an outer clamping sleeve, an adjusting valve, a double-liquid-discharging-valve assembly and a vacuum meter. An inlet of the buffer device is connected with the evaporation system through a pipeline, an outlet of the buffer device is connected with the vacuum pump through a pipeline, and an inlet regulating valve and an outlet regulating valve are installed on the inlet pipeline and the outlet pipeline. According to the utility model, condensation and separation of gas-phase substances are realized through the integrated buffer device; through linkage of the vacuum meter and the outlet adjusting valve, accurate adjustment of the vacuum degree of the laboratory vacuum system and effective protection of the vacuum pump are achieved, the experiment efficiency and the equipment safety are remarkably improved, and the practical value and the popularization significance are high.

The invention discloses a laboratory condenser cooling device based on water temperature difference automatic circulation, relates to the technical field of laboratory equipment cooling, and aims to solve the problem of water resource waste caused by the fact that an existing condenser is directly cooled by tap water. The device comprises a condenser, a cooling cavity, a heat dissipation device, an upper circulating pipe and a lower circulating pipe, the condenser is sleeved with the cooling cavity, the upper circulating pipe is connected with the top of the cooling cavity and a water inlet of the heat dissipation device, and the lower circulating pipe is connected with a water outlet of the heat dissipation device and the bottom of the cooling cavity to form a closed circulating loop. The core principle is a thermosyphon effect: cooling water in a cooling cavity is heated after absorbing heat of a condenser, the density is reduced, and the cooling water naturally rises to a heat dissipation device through an upper circulating pipe; hot water is cooled after air heat dissipation, the density is increased, the hot water flows back to the cooling cavity through the lower circulating pipe, and automatic circulating cooling is achieved. The device does not need an additional power source, consumes no water resource, is simple in structure, convenient to maintain and stable in cooling effect, is suitable for condenser cooling in processes such as laboratory distillation and reflux, and meets the requirements of energy conservation and environmental protection.

The invention provides an in-pipe gas-liquid two-phase jet flow condensation testing device and a multi-physical field measuring method. In the testing device, a water storage tank, a variable frequency pump, an electromagnetic valve, a mass flow meter, a heater and a visual testing section are sequentially connected in the flow direction of a medium; an outlet of the visual test section is sequentially connected with a condenser, an electromagnetic valve and a water storage tank; an outlet of the heater, an outlet of the visual test section and an outlet of the electromagnetic valve are all provided with pressure sensors and thermocouples; the deionized water tank, the electric heating boiler, the regulating valve, the vortex shedding flowmeter and the visual test section are sequentially connected in the flow direction of a medium, a pressure sensor and a thermocouple are arranged at an outlet of the vortex shedding flowmeter, and a steam nozzle, a pressure sensor, a thermocouple, a plurality of hydrophones, an accelerometer and a sound wave generator are arranged on the visual test section; wide-range regulation and control of flow velocity and pressure of a supercooled working medium can be realized, and the problems of difficulty in flow velocity and pressure regulation and control of a static working medium experimental device and laboratory reproduction of a condensation instability mechanism under a dynamic working condition are solved.

The utility model belongs to the field of fluorination process equipment, and particularly discloses an electrolytic fluorination system which comprises an electrolysis device and a cooling device, the electrolysis device comprises an electrolytic bath, a raw material storage tank, a condenser and a product collecting tank, and a discharge port of the raw material storage tank is communicated with a feed port of the electrolytic bath; a discharge port of the electrolytic bath is communicated with a feed port of the condenser, and a discharge port of the condenser is communicated with a feed port of the product collecting tank; the cold supply device comprises a refrigerating machine and a water cooling head, the water cooling head is fixedly connected to the electrolytic bath, a water inlet of the water cooling head is communicated with a water outlet of the condenser, a water outlet of the water cooling head is communicated with a water inlet of the refrigerating machine, and a water outlet of the refrigerating machine is communicated with a water inlet of the condenser. According to the fluorination system, the structure of an existing fluorination device is simplified, the size of the fluorination system is reduced, the fluorination process of the fluorination system is more concise and higher in efficiency, and the fluorination system can be suitable for being used in a laboratory and used for fluorination of trace raw materials and is better in applicability.

The invention discloses a rotary evaporator capable of realizing evaporation concentration and reflux extraction, and belongs to the technical field of laboratory instrument equipment. The technical problems to be solved are that switching of evaporation concentration and reflux extraction functions of a traditional rotary evaporator needs pipeline dismounting, operation is tedious, and sealing performance is poor. The rotary evaporator comprises an evaporation system, a rotary driving system, a vacuum system and a control system, the evaporation system comprises a snakelike condensation pipe, an evaporation bottle, a collection bottle and a flow guide structure, the flow guide structure is composed of a spherical glass cavity with four ports and a ball valve embedded in the spherical glass cavity, and the ball valve is switched between two working positions through a rotary feeding channel. The functions of evaporation concentration and reflux extraction are respectively realized. The device is mainly used for evaporation concentration and reflux extraction operation in laboratories and chemical production.

A nitrogen generating device relates to the technical field of nitrogen devices and comprises a machine body, an air compressor is arranged in the machine body, the output end of the air compressor is connected with a condenser, the output end of the condenser is connected with a first gas source processing assembly, and the output end of the first gas source processing assembly is connected with the input end of a pressure tank. And the output end of the pressure tank is connected with a multi-stage gas output mechanism. Due to the integrated design, the occupied area of a laboratory is reduced, and the storage risk of a high-pressure gas cylinder is avoided; the three-stage output respectively meets the differentiated requirements of common air pressure, high-purity dry gas and high-concentration nitrogen; moisture, oil mist and peculiar smell are effectively removed through the multi-stage filtering and drying assembly, and the operation safety of the instrument is guaranteed; the device is suitable for chromatographic analysis, purging protection and other scenes, and is especially suitable for small and medium-sized laboratories.

The invention discloses an intelligent rotary evaporator, an operation method and application of the intelligent rotary evaporator in a laboratory, and relates to the technical field of rotary evaporators. The intelligent rotary evaporator comprises a body base, a lifting adjusting assembly is fixed to the base, a rotating assembly is installed on the lifting adjusting assembly, a rotating bottle is fixed to one end of the rotating assembly, and a four-way bottle is rotationally connected to the other end of the rotating assembly; the upper end of the four-way bottle is communicated with a condenser, the lower end of the condenser is communicated with a collecting bottle, a feeding pipe is installed on the four-way bottle and extends into the rotating bottle, the lifting adjusting assembly comprises a vertical frame, the upper end and the lower end of the inner side of the vertical frame are each slidably connected with two sliding blocks, and the sliding blocks are each provided with a guide rod and a threaded rod; the fixing rod is in transmission connection between the two threaded rods, the adjusting blocks are meshed on the threaded rods, the two adjusting blocks can be controlled to move upwards or downwards by rotating the two threaded rods, meanwhile, the fixing rod is hinged to the adjusting blocks, then the inclination angle of the adjusting blocks is adjusted, and then the inclination angle of the rotating assembly is adjusted.

This utility model relates to the field of laboratory equipment technology, specifically a high-efficiency parallel evaporation drying device, including an evaporation drying chamber. A heating plate is installed at the bottom of the evaporation drying chamber, and the heating plate is connected to a drive module to heat the evaporation drying chamber. An arched sealed cover is installed on the top of the evaporation drying chamber. A control unit is isolated on the side of the evaporation drying chamber. The control unit is equipped with a power switch, an electronic condenser vent, and a touch screen intelligent controller. The touch screen intelligent controller is electrically connected to the drive module. It uses an air bath instead of a water bath and employs temperature and humidity sensors for precise temperature and humidity control. While being safe, energy-saving, and environmentally friendly, it achieves functions such as adjustable temperature and humidity, precise temperature and humidity control, and gradient temperature and humidity control. It is used to solve problems such as poor temperature controllability of the original device, inability to achieve step temperature control, easy scale formation in the water heating part, lack of leakage protection, and safety hazards, thereby improving the precision and accuracy of the data.

The invention relates to the technical field of chemistry and chemical engineering experiments, in particular to an environment-friendly semi-automatic column chromatography instrument which comprises a column chromatography assembly, a solvent distillation assembly and an integrated control assembly. The column chromatography assembly comprises a solvent storage bottle, a chromatographic column and a leacheate receiving bottle; the solvent distillation assembly comprises a distillation bottle, a distillation head, a dustproof assembly, a flange clamp, a primary condenser, a secondary condenser, a liquid separator and a liquid receiving bottle; the integrated control assembly comprises a hot bathing pool, a cold bathing pool, a cooling liquid conveying pump, a solvent conveying pump, a circulating air pump, an air pressure adjusting assembly, an air pressure sensor A, an air pressure sensor B and a comprehensive controller. Under coordinated control of the integrated control assembly, the provided environment-friendly semi-automatic column chromatography can realize cyclic utilization of leacheate. The method has the effective benefits that through efficient cyclic utilization of the leacheate, an environment-friendly column chromatography experiment can be carried out, and the method has important significance for improving the environment of a chemistry and chemical engineering laboratory and promoting rapid development of healthy chemistry.