170 results about "Mass exchange" patented technology

A three-dimensional (3-D) culture “Petri-dish” for research in regenerative medicine, biotechnology and clinical translation is described. This 3-D perfusion culture dish is to advance in vitro culture tools from static 2-D to dynamic 3-D perfusion culture. Interwoven hollow fiber capillary membranes divide the “Petri-dish” culture space into a controllable 3-D pattern of different compartments, serving the functions of the organ's larger vasculature. These physically active scaffolds, which can be suitable for cell adhesion or cell aggregate immobilization, offer a supply of cells with high-performance mass exchange including gas supply and under perfusion conditions. In contrast to static and discontinuous medium supply, a dynamic culture can be achieved with continuous or alternating medium supply and integral oxygenation. They provide a more physiologic supply in the cell macro environment, including homeostasis of oxygen, pH, nutrition, soluble factors, and gradients of metabolites for the cells. Also, medium perfusion can be achieved. Consequently the invention was made for cultures at tissue density, especially stem cells and support cells, which strive to create their own stem cell niche.

The present invention discloses a vortex-modulation based micromixer for enforced mass exchange. The micromixer of the present invention comprises a mixing chamber with grooves on one wall thereof and a special-shape barrier on another wall. As different fluids are injected into the mixing chamber respectively from two inlets of the micromixer, the grooves and barriers of the micromixer of the present invention create the constructive interferences to form the active-like agitation of the fluid. For every groove, the flux passed by can be increased via its high pressure gradient. Understandably, the mixing efficiency of the fluids can be greatly improved within a very short distance. At last, the outlet of the micromixer is located in the downstream of the mixing chamber and further is able to connect with other elements. The present invention is entirely a passive micromixer and no additional energy is required. The present invention can apply to a continuous chemical analysis, particularly to a lab-on-a-chip or a micro total analysis system.

An artificial “arterio-venous” permeable hollow fiber capillary membrane system for wound treatment is described, that can be placed onto a wound, under the wound dressing, to enable fluid-/mass exchange, and thus enables pH- and electrolyte regulation, the supply of factors/mediators/medications, the removal of secretion- and/or waste material, and the support of therapeutically applied cells in the wound.

A membrane device and processes for fabrication and for using are disclosed. The membrane device may include a number of porous metal membranes that provide a high membrane surface area per unit volume. The membrane device provides various operation modes that enhance throughput and selectivity for mass exchange, mass transfer, separation, and/or filtration applications between feed flow streams and permeate flow streams.

The invention discloses a recycling method and a system for the afterheat of the smoke gas of oil and natural gas boilers. The method comprises the steps as follows: the smoke gas with high temperature is pre-sprayed and cooled in the inlet pipe seat of the smoke gas with high temperature through a nozzle before entering the main cylinder of an afterheat recycling device; the smoke gas with high temperature after being pre-sprayed and cooled is led to enter into the main cylinder along the tangent direction of the main cylinder, rotate and float upwards in the main cylinder; the smoke gas with high temperature which rises in a rotating way is mainly sprayed and cooled in the middle upper part of the main cylinder through the nozzle; the smoke gas with high temperature flows out of the main cylinder from the upper part of the main cylinder after conversely contacting and changing heat with spraying water fog. In the invention, pre-spraying and cooling are adopted to lead the smoke gas with high temperature to be directly contacted and mixed and change heat with the spraying and cooling water fog when the smoke gas with high temperature passes through a smoke gas inlet; on one hand, the burden of a mist trap can be reduced; on the other hand, the burden of heat and mass exchange of the main cylinder can be reduced, thus leading the volume of the main cylinder to be smaller and the structure of the main cylinder to be more compact.

The invention relates to a double-layer air curtain system for a refrigeration storage, and the double-layer air curtain system is provided with two different air curtain devices. The system is composed of a cross-flow air curtain machine, a centrifugal air curtain machine, a grating, a flow guide plate, manual-type adjusting switches, a hanging plate, a fastening screw, and a wiring terminal. In the system, the cross-flow air curtain machine is installed on the outside wall body of the refrigeration storage, a cross-flow fan is used for injecting a normal-temperature airflow so as to form an air curtain, and the air curtain is used for preventing hot air outside the storage from intruding into the storage; simultaneously, the centrifugal air curtain machine is installed on the inside wall body of the refrigeration storage, a centrifugal fan is used for injecting a low-temperature airflow, and the low-temperature airflow is used for preventing cold air in the storage from flowing outwards, and maintaining a low-temperature environment in the storage. The manual-type adjusting switches at the both sides of each of the air curtain machines are used for adjusting the air supply speed and the air supply angle of the air curtain, so that the heat-insulating effect of the air curtain can be improved. By virtue of the system, the sealing performance of the air curtain of the refrigeration storage is improved, air heat and mass exchange in the areas of the both sides of the air curtain is effectively suppressed, and an energy-saving effect is achieved; simultaneously, the system has dustproof, anti-pollution, anti-mosquito effects and the like, and is especially suitable for refrigeration storages for storing foods.

The invention relates to a porous magnesium alloy/biological ceramic bionic composite support and a quick forming method thereof. The quick forming method comprises the following steps of: performing appearance relativity, microstructural bionic design and structural optimization by means of reverse engineering and a computer-aided design (CAD) technology on the basis of analytical results of structures and biomechanics of different bone coloboma parts to establish a CAD model of the support; manufacturing a porous bioactive ceramic frame with two stages of pipelines which are not communicated mutually by a method for forming ceramics directly by photocuring; and casting molten magnesium alloy into a secondary pipeline of the biological ceramic frame by a vacuum suction casting method, cooling and solidifying to obtain the porous magnesium alloy/biological ceramic bionic composite support, wherein a primary pipeline is used for meeting the requirements of tissue growth and nutritionalmetabolism, and the magnesium alloy is filled into the secondary pipeline to enhance the mechanical property of the composite support and reduce a contact area of the magnesium alloy and body fluid, so that mass exchange of the magnesium alloy and a human body environment is avoided within a period of time of degrading ceramics to ensure the filled magnesium alloy provides continuous mechanical strength in the process of bone healing.

The invention relates to a method for preparing cyclopentanol from cyclopentene through an indirect hydration method. The method comprises steps that: liquid phase cyclopentene and acetic acid are subject to an addition reaction with a fixed-bed catalyst, such that cyclopentyl acetate is obtained, wherein the catalyst is sulfonic cation exchange resin with a mass exchange capacity of 3-5.5mmol/g;the product of the addition reaction is processed through rectification separation, such that refined cyclopentyl acetate is obtained; the refined cyclopentyl acetate is subject to an ester exchange reaction with methanol under the existence of a catalyst CaO, such that cyclopentanol and methyl acetate are produced; the produced methyl acetate is removed during the reaction process; the product of the ester exchange reaction is filtered, such that the catalyst is removed; and the obtained product is processed through rectification separation, such that the product cyclopentanol is obtained. The method provided by the invention provides substantial positive effects. The addition reaction and the ester exchange reaction have relatively high conversion rate and selectivity, and an average overall yield reaches approximately 80%. More importantly, no substance with high acidity and corrosivity is appeared in the reaction system during the whole reaction process. The raw materials which are not reacted can easily be recovered and reused, and almost no environment pollution is caused.

A mass-exchange contact device is proposed, comprising an upper tray, contact element including a barbotage unit configured as an inner cap with strips tangently bent out, a lower tray, a casing including a ring-shaped descending limiter, windows circumferentially disposed on the casing's walls (lower row), orifices circumferentially disposed on the casing's walls (upper row) above the windows, a double-acting valve composed of an upper and lower plates fixedly attached to a distance rod, and a cover bushing disposed coaxially to and around the upper region of casing embracing the contact element. Embodiments comprise a number of rows of the proposed devices situated one above the other, and separated by multi-layer packing fittings. In catalytic distillation columns, the fittings can be filled with catalytic material. Alternatively, the fitting is substituted with a grating that supports a catalytic granular layer. The device allows improving operation, reliability, durability, reducing its weight and costs.

The invention relates to a semi-physical simulation platform used in a cement clinker calcining process. According to the semi-physical simulation platform used in the cement clinker calcining process, a software simulation device, a signal conversion device, a control system and a monitoring device are connected in sequence. A simulation method of the semi-physical simulation platform comprises the steps that procedure parameters are input into a cement clinker calcining process dynamic model established by the monitoring device and sent to the control system; the procedure parameters are output by the control system to the signal conversion device, data conversion is carried out on the procedure parameters by the signal conversion device, and the procedure parameters are then output to a memory of the software simulation device to be stored; the software simulation device acquires virtual working condition parameters; the virtual working condition parameters output by the software simulation device are fed back to the control system by the signal conversion device; the virtual working condition parameters of the control system are received by the monitoring device and then are displayed through a human-computer interaction interface in an imaging mode. According to the modeling of the semi-physical simulation platform and the simulation method thereof used in the cement clinker calcining process, the dynamic variation rule of in-kiln gas-solid interphase energy and mass exchange is described from the view of mechanisms based on basic principles of mass conservation, energy conservation and macroscopic reaction kenitics.

The invention discloses a preparation method of a flame retardation graphene coating material, and relates to a preparation method of a coating. The method is characterized in that graphene oxide prepared through a Humeers hydrothermal technology is reduced by hydrazine hydrate, organosilane is used as a bridge to connect graphene with epoxy resin through chemical bonds, and a graphene and epoxy resin integrated coating material is synthesized through molecular design. The surface modifying organosilane avoids afresh stacking and aggregation of graphene flakes, so the heat stability and the tensile strength of the graphene and epoxy resin integrated coating material are substantially improved. The integrated functional material improves oxygen index of the tensile strength of the epoxy resin and reduces the heat release rate peak and the total heat release amount, because the integrated coating material can catalyze degradation of the epoxy resin to form a close and porous carbon layer covering the surface of polymer, prevent heat and mass exchange between a gas phase and a solid phase and delay further degradation of the internal material in order to reach the flame retardation purpose of the coating material.

The invention discloses a method and a system for preparing an anhydrous hydrogen chloride gas. The method of the invention comprises that: a hydrous hydrogen chloride gas enters a dehydrating tower (C-101) from the bottom of the dehydrating tower (C-101) to flow upward; a cold hydrogen chloride liquid enters the dehydrating tower (C-101) from the top of the dehydrating tower (C-101) to flow downward and carries out heat and mass exchange with the hydrous hydrogen chloride gas flowing upward in the dehydrating tower (C-101), wherein the cold hydrogen chloride liquid flowing downward makes the temperature of the hydrous hydrogen chloride gas flowing upward reduced to below the dew point of the hydrogen chloride gas the liquid water content of which is 10*10-6 under the system pressure in the dehydrating tower (C-101); and then collecting the hydrogen chloride gas discharged from the tower top of the dehydrating tower (C-101) to obtain the anhydrous hydrogen chloride gas. The method of the invention does not introduce extra impurities, has deep dehydrating depth, saves materials, and has low cost and simple and convenient operation.

The invention discloses a super-gravity heat exchange process which is characterized in that high-speed movement water mist is formed by cutting and dispersing cooling liquid through a super-gravity cooling liquid atomization device and is in direct contact with air capable of backflow spiral movement generated by a heat exchange barrel and an air inlet device to flow, and cooling liquid and air efficient heat and mass exchange is realized by increasing the cooling liquid and air heat transfer area, accelerating the relative speed and increasing the mutual contact number. According to the super-gravity heat exchange process, the high-speed movement water mist is formed by cutting and dispersing water by utilizing the super-gravity cooling liquid atomization device and is in direct contact with the air capable of backflow spiral movement generated by the heat exchange barrel and the air inlet device to perform unique flow behavior, and the cooling liquid and air efficient heat and mass exchange is realized through increasing the cooling liquid and air heat transfer area, accelerating the relative speed and increasing the mutual contact number, so that the heat and mass transfer effect is greatly improved; meanwhile, the number of the used cooling liquid is greatly reduced, and a large amount of resources are saved.

A rectification column for multi-component mixture separation with internal heat and mass exchange, which ensures a heat and mass exchange in the film mode with internal reflux generation along the whole length of heat and mass exchange tubes and which allows for an increased efficiency, is proposed. The rectification column includes the rectifying/enriching section with the heat and mass exchange in its tubular and annular spaces being topped by a heat carrier distributor with a distributor chamber (17) on top of the heat carrier distributor in such a way that a higher pressure of fluid heat carrier in the distributor chamber (17) than in the annular space is allowed. The design of the distributor allows to separate an upper outlet for heat carrier vapors and a lower outlet for liquid heat carrier from the annular space completely from the fluid supply of fluid heat carrier in the distributor chamber. A feed-in device allows the multi-component mixture to enter the tubular spaces from below. A device for liquid phase (from the multi-component mixture) discharge from the rectification column. A heating medium vessel may be connected to the annular space and steam condenser of the heat carrier medium. One or more additional lower rectification section/s (19) with the heat and mass exchange in its tubular space of the tubes being aligned with the tubes may be provided directly below the enriching section. A steaming section, wherein the tubes and may be equipped with turbulators. The rectification column permits to extract intermediate fractions of the separated mixture with the help of appropriate devices installed below the enriching section.

Drying methods of mancozeb closed cycle, the mancozeb was sent into the dryer, take heat and mass exchange with 140 degree C to 250 degree C nitrogen gas or carbon dioxide, separate in the cyclone separator and bag filter, dry goods was sent into cooler and unloaded after cooled to room temperature, the off-gas heat was recycled by recoverer, sent to the heater. Its installations comprises the dryer, cyclone separator, waste heat recoverer, the fan, spraying tower, heater and dry goods cooler, the air outlet was connected with the air inlet of the cyclone separator, its air outlet was connected with the hot end air inlet of the waste heat recoverer, the hot end air outlet was sequentially connected with spraying tower, demister and fan, the air outlet of the fan connects the cold end air inlet of the waste heat recoverer, the cold end air outlet of the waste heat recoverer connects the air inlet of dryer by the heater, the discharging mouth of cyclone separator links the dry goods cooler, which has discharge gate on it, the heater was set with heat medium inlet and outlet, the spraying tower was set with cooling water inlet and water outlet down, the bottom of the demister was also set with water outlet.

A liquid separator configured to separate liquid from a fluid stream. The separator includes a housing, a separation chamber disposed within the housing, a drain having a drain passageway for draining liquid from the separation chamber, an inlet chamber configured to receive the fluid stream, an inlet channel configured to communicate the fluid stream from the inlet chamber to the separation chamber, a swirler disposed within the inlet channel, and an outlet channel configured to communicate the fluid stream from a first outlet end positioned proximate the second inlet end, to a second outlet end remote from the separation chamber. Preferably, the separator also includes a separator mounting face proximate the inlet chamber, the mounting face configured for mounting the separator to a humidifier. The housing preferably includes a base and a cap which is removably mountable to the base.

The invention provides a method and a device for regenerating a liquid desiccant, which belongs to the field of air moisture adjustment. The device comprises an external heat source (1), a solution pump (2) and a pot-type container (3), wherein one end of the pot-type container (3) is provided with a regenerated air intake distributor (4) while the other end is connected with a draught fan (5); and a demisting component (6) and an atomizer (7) are arranged in the pot-type container (3). The method for regenerating the liquid desiccant comprises the following steps of: heating the liquid desiccant by the external heat source (1), and then delivering the heated liquid desiccant to the pot-type container (3) by the solution pump (2); atomizing the liquid desiccant by the atomizer (7) to form tiny fog drops; and performing heat and mass exchange on the fog drops and the air entering from the air intake distributor (4) to realize the regeneration of the liquid desiccant. The method and the device for regenerating the liquid desiccant significantly improve the regeneration effect, and the one-way solution process concentration change can be promoted by 1.5 to 3 percent; the heat utilization efficiency is high and reaches over 70 percent; and the device has a simple structure and is convenient to operate and maintain.

The invention relates to the technical field of engines, and discloses a mixing flame stabilizing device. The mixing flame stabilizing device comprises a lobe mixer, a cover plate and turbulent flow columns, wherein a gas collecting cavity is formed between the cover plate and the lobe mixer; the turbulent flow columns are arranged at the position of an outer culvert air flow outlet of the lobe mixer; inner cavities of the turbulent flow columns communicate with the gas collecting cavity; the side walls of the turbulent flow columns and the cover plate are provided with spraying holes a and spraying holes b correspondingly; combustible gas is subjected to secondary flow dividing through the spraying holes a and the spraying holes b and then enters a combustion chamber to be mixed with air,the spraying pressure of the combustible gas is increased, accordingly, the penetrating capacity of the combustible gas in the gaseous environment is improved, and accordingly efficient mixing of twoair flows is achieved; and the turbulent flow columns are arranged at the position of the outer culvert air flow outlet of the lobe mixer, a large-scale radial vortex can be formed on the downstreamportion of the turbulent flow columns, outer culvert air is forced to flow in the circumferential direction of the turbulent flow columns at an outlet of the mixer, the mixing distance of the outer culvert air and inner culvert combustible gas is shortened, the mass exchange rate of the air and the combustible gas at an inner culvert outlet of the mixer is increased, and the mixing effect is improved.

This invention relates to a washing liquid for waxberry, which comprises: NaCl 1-20 parts, citric acid 1-5 parts, plant flavones 1-5 parts, plant tannin 2-10 parts, propylene sodium 1-3 parts, and water 900-1000 parts. The washing liquid can remove dust and larva/eggs of drosophilas on waxberry surface, and can inhibit the growth of bacteria and fungi. The washing liquid can also reduce its mass exchange with waxberry, thus can retain the flavor, nutritious ingredients and quality of waxberry.