7results about How to "Improve mass transfer coefficient" patented technology

This utility model discloses a mixing agitator for a hydrogenation reactor, comprising a reactor body, multiple legs fixedly connected to the outer wall of the bottom of the reactor body, a top cover rotatably connected to the top of the reactor body, a feed pipe fixedly connected to the top of the top cover, a feed cover plate rotatably connected to the top of the feed pipe, a discharge pipe fixedly connected to the bottom of the reactor body, a discharge valve fixedly connected to the outer wall of the discharge pipe, a stirring mechanism installed on the inner wall of the reactor body, an aeration treatment mechanism installed on the top of the reactor body, and a foam elimination mechanism installed inside the reactor body. The air pump of this utility model's aeration treatment mechanism introduces hydrogen gas into the rotating shaft through the air inlet pipe, and sprays it out from the aeration pipe through the air guide hose. This, combined with the motor driving the rotating shaft and stirring rod of the stirring mechanism, causes the hydrogen gas to disperse into tiny bubbles. Simultaneously, a scraper removes material from the reactor wall, avoiding dead zones and improving the uniformity of the gas-liquid-solid three-phase mixing. The mass transfer coefficient is improved compared to traditional agitators.

This invention relates to the field of freeze-drying technology, specifically to an intelligent vacuum freeze dryer and its usage method. The dryer includes a main unit and a pre-freezing vacuum chamber within it, a shelf placed inside the pre-freezing vacuum chamber, the shelf having an internal cavity and a main gas inlet at its bottom for gas to enter the internal cavity; a carrying tray with multiple evenly arranged internal components for storing materials, the tray having multiple planar grids and heating elements for releasing heat, multiple push rods for moving materials within the planar grids, and an adjustment component for adjusting the position of the push rods according to different usage environments; and side rotating columns with multiple evenly rotatable components connected to the sidewalls of the carrying tray, each side rotating column having multiple exhaust ports, and the carrying tray having an efficiency-enhancing component for driving the side rotating columns.

This invention relates to a DGT sampling device and method based on a glass sponge biomimetic eddy current anchoring structure, belonging to the field of environmental monitoring technology. The DGT sampling device includes a biomimetic outer shell, a filter protection layer, a diffusion layer, a bonding layer, and a base. The biomimetic outer shell includes a base grid layer and spiral guide ridges arranged along the axial direction of the outer shell on the outer surface of the base grid layer. The two ends of the biomimetic outer shell along its length are a closed end and an open end, respectively. The filter protection layer is disposed at the open end of the biomimetic outer shell. The diffusion layer is disposed on the side of the filter protection layer away from the biomimetic outer shell. The bonding layer is disposed on the side of the diffusion layer away from the filter protection layer. The base is used to fix the filter protection layer, diffusion layer, and bonding layer to the biomimetic outer shell. This invention aims to solve the problems of low mass transfer efficiency, measurement accuracy greatly affected by hydrodynamics, and susceptibility to physical wear and biofouling in existing DGT sampling technologies.

This invention discloses a fresh air purification and energy regulation system based on a dual-tower closed-loop water circulation system, relating to the field of building ventilation and air conditioning technology. The system uses water as the phase change working fluid and purification medium, and includes a dual-tower closed-loop cross-circulation energy recovery and purification core unit, a water treatment and maintenance module, a power and precision control module, and a temperature-controlled sterilization chamber post-treatment module. The air source heat pump only controls the water temperature in the exhaust gas water tank; the fresh air water tank temperature is naturally formed through circulation. Air and water exchange heat and mass in a counter-current flow within the spray tower packing layer, achieving net energy gain through water phase change. The system prioritizes dehumidification, operates adaptively in all seasons, with the fresh air outlet temperature approaching the wet-bulb temperature of the exhaust gas in summer and approaching the dry-bulb temperature in winter. The dynamic energy recovery rate reaches 126%, the water medium provides deep purification without secondary pollution, the core components are easy to maintain, and it is suitable for ventilation regulation in various buildings, combining high energy efficiency, high adaptability, and health benefits.

The utility model provides a kind of filtering membrane structure of spherical graphite reverse osmosis device belongs to spherical graphite reverse osmosis device technical field, the filtering membrane structure of this spherical graphite reverse osmosis device includes: spherical shell, filter membrane component, support framework, water inlet pipeline, water outlet pipeline and sealing ring;The spherical shell is made of stainless steel material, the surface of spherical shell is equipped with water inlet and water outlet, water inlet is located in the upper hemispherical surface of spherical shell, and water outlet is located in the lower hemispherical surface of spherical shell;The filter membrane component is arranged inside spherical shell, and the filter membrane component includes graphite filter membrane and membrane fixed frame, the graphite filter membrane is spherical and concentrically arranged with the inner surface of spherical shell;It can solve the technical problems that the filtering membrane structure of spherical reverse osmosis device in the prior art has uneven stress on membrane material, insufficient support strength, unreasonable fluid distribution, low filtration efficiency and short membrane life.

The invention relates to the technical field of separation and extraction of natural products, in particular to a method for supercritical separation and extraction of astaxanthin, which comprises the following steps: (1) weighing raw material components in parts by weight; (2) mixing a biomass raw material rich in astaxanthin with the functionalized deep-eutectic solvent, and performing physical field enhanced extraction to obtain an extracting solution; (3) filtering the extracting solution through a vibrating membrane, and purifying to obtain a trapped fluid containing astaxanthin; and (4) carrying out supercritical CO2 back extraction on the trapped fluid, separating to obtain an astaxanthin product, and recovering the functional eutectic solvent. According to the method, continuous membrane separation and purification under the eutectic solvent system are realized, the purity of astaxanthin and the proportion of all-trans astaxanthin are maintained while the extraction rate of astaxanthin is increased, the solvent can be recycled after being recovered, and the production cost and waste liquid discharge are greatly reduced. All the raw materials are nontoxic and harmless, no organic solvent is used in the technological process, and good application prospects are achieved.

The application relates to a fluid mass transfer device and method for strengthening bubbles by using a multistage reverse single-cyclone, which comprises at least two reverse cyclone units connected in series, wherein each reverse cyclone unit comprises a reverse cyclone and a cyclone liquid storage cavity, the reverse cyclone comprises a cylindrical cavity part and a cyclone cavity part, the cylindrical cavity part is provided with a liquid inlet and a reverse cyclone gas channel, the cyclone cavity part is provided with a gas outlet, a liquid tangential outlet and a gas axial inlet; the liquid to be mass transferred is fed into the liquid inlet of the uppermost reverse cyclone unit, and the gas after mass transfer is discharged from the gas outlet. Compared with the prior art, the application has the advantages that the gas-liquid contact time is prolonged by connecting the reverse cyclone units in series, the mass transfer efficiency is improved, the gas is sucked and reversely contacted and mixed by fluid negative pressure, the gas is further broken into smaller scales, the mass transfer area and the mass transfer coefficient are improved, the energy consumption is low, the gas-liquid mass transfer efficiency is high, and the overall device has the advantages of small land occupation and the like.