35results about How to "Lower boiling point" patented technology

The invention provides a preparation method of a calcium alginate electrically-driven film adopting a microwave vacuum low-temperature drying technology. The microwave vacuum low-temperature drying technology is adopted, and through the combination with the two technologies of microwave drying and vacuum drying, the advantages of the two technologies are sufficiently and comprehensively developed.The preparation method comprises the following steps: using natural macromolecular biological materials of sodium alga acid as a film forming main material and a cross-linking agent CaCl2, and addingplasticizer glycerinum and plastic assisting agent lauryl sodium sulfate so as to prepare the calcium alginate electrically-driven film of a three-dimensional network gel structure. The raw materialsare wide in sources and low in cost, and the obtained electrically-driven film is non-toxic, tasteless and biodegradable. After microwave vacuum drying, hierarchical pore structures are connected with one another and are regular, the ionic cross-linking of Ca<2+> on the inner layer and the outer layer is comprehensive and uniform, and the electrically-driven film is excellent and controllable inelectrically-driven performance and long in service life. The microwave vacuum low-temperature drying technology of the calcium alginate electrically-driven film prepared in the invention is energy-saving, efficient and free of pollution, and is mostly beneficial for high molecular material synthesis and curing reaction with extremely high requirement for heating rate and uniformity.

The invention discloses a continuous evaporative crystallization device and method for 4-cyanopyridine. The device comprises a pressurizing assembly, a connecting pipe and an evaporation reaction kettle, and is characterized in that the pressure in the evaporation reaction kettle is increased by the pressurizing assembly so as to the crystallization temperature of the 4-cyanopyridine and the boiling point temperature of other organic solvents, after pressurization is completed, a heating resistor is used for heating and crystallizing part of the solution to ensure that only water and other organic solvents are vaporized and the 4-cyanopyridine is heated and crystallized in the evaporation and crystallization process of the 4-cyanopyridine, and meanwhile, water vapor, the other organic solvents and part of the 4-cyanopyridine are absorbed and liquefied again by a condensation reflux box, and drop on the right side of the evaporation reaction kettle, and the heating resistor on the right side carries out evaporative crystallization operation under normal pressure again, so that the 4-cyanopyridine is separated out after being crystallized and is attached to the inner wall of the right side of the evaporation reaction kettle, the crystallization operation steps of the 4-cyanopyridine are simplified, and the crystallization amount of the 4-cyanopyridine separated out is effectively increased.

The disclosure provides a refrigerant composition, a mixed working medium and a compressor, which relate to the technical field of refrigeration, and are physically mixed with ethylene and butane at room temperature. Component 1: ethylene, whose content is 20% by weight or less based on the weight of the composition 50 wt%; component two: butane, the content of which is 50 wt% to 80 wt% based on the weight of the composition; the component two is at least one of n-butane and isobutane. The corresponding refrigerant composition is obtained, and the boiling point temperature of the system can be lowered in the single-stage compressor, so that a lower refrigeration temperature can be achieved.

The invention discloses an infrared air exhaust and pressure reduction material-drying device comprising a tank body than can be enclosed inside. An infrared lighting source emits infrared to the inside of the device. The tank body that can be enclosed is connected with an air exhaust and pressure reduction assembly. Material requiring drying is disposed in the tank body that can be enclosed. Under the irradiation of the infrared, the internal water molecules of the irradiated substance can generate resonance energy because of absorption of the infrared and the temperature of the irradiated substance rises. The heating management of the irradiated substance is controlled through intensity of illumination of the infrared and interval of on-off irradiation time. The material requiring drying is heated to a predetermined temperature and achieves specific vacuum pressure through air exhaust and pressure reduction via communication of a vacuum pump pipeline together with the tank body that can be enclosed, so that the boiling temperature of the water can be reduced to be below the specific temperature according to physical characteristics and the internal water molecules of the substances can vaporize through boiling. Vaporized moisture can be exhausted during the air exhaust and pressure reduction. The infrared air exhaust and pressure reduction material-drying device is formed by the tank body, which can be enclosed and can employ the vacuum pump for the air exhaust and pressure reduction, and the infrared lighting source.

The invention relates to a device for extracting iris root oil by virtue of dynamic circulation type steam vacuum distillation and belongs to a distillation device for producing iris root oil. The device comprises a heating kettle, a coil condenser and an oil-water separator, wherein the heating kettle is externally provided with a reboiler; the nozzle of the reboiler is below the liquid surface in the kettle; a distillation device is vacuumized so that the temperature in the kettle is less than 90 DEG C when water in the kettle is boiled; a water returning port on an empty tower joint is level with the upper edge of the clamp sleeve of the oil-water separator or slightly lower than the upper edge of the clamp sleeve; and the kettle body is of a vertical cone. The iris root oil extracted by the device is clear in color and pure in perfume, and the yield can be improved by 50%.

The invention belongs to the technical field of micro-heaters, in particular to a self-generated potential excited micro-bubble-enhanced evaporation heat exchange tube. The conical ring is provided with micro-holes in the axial direction, and permanent magnets are embedded in the conical ring to form a magnetic field. The fluid passes through the conical ring micro-holes to form a jet impinging blade to make it rotate, and a thin boundary layer will be formed near the stagnation point of the jet impingement, thereby enhancing the heat transfer efficiency. During the rotation of the blade, the coil cuts the magnetic field line in the magnetic field to form an electromotive force, and the thermal effect of the current prompts the micro-heater to work to excite the micro-bubbles, triggering the starting point of boiling and enhancing the boiling heat transfer. At the same time, the blade rotation increases the disturbance in the tube, increases the turbulence degree, reduces the angle between the fluid velocity field and the temperature gradient field in the tube, improves the degree of field synergy, and strengthens the heat transfer in the tube.

The invention relates to a closed brayton cycle excess heat generating system. A start pressurization system is connected with a helium gas inlet of a countercurrent flue gas heat exchanger through a helium gas circulation line, the helium gas inlet of the countercurrent flue gas heat exchanger is connected with a turbo-power device through the gas circulation line, a helium gas excess heat recovery outlet of a turbine return circuit heat regenerator is connected with a turbine return circuit radiator and a gas compressor in sequence through the helium gas circulation line, a helium gas heating gate of the turbine return circuit heat regenerator is connected with the gas compressor through the helium gas circulation line, the helium gas heating gate of the turbine return circuit heat regenerator is connected with the start pressurization system through the helium gas circulation line, the turbo-power device is coaxially connected with an electric generator device and the gas compressor. The closed brayton cycle excess heat generating system features wide temperature adaptation range to heat source exhaust gas, simple structure, high excess heat utilization factor and stability andreliability.