779results about How to "Improve purification rate" patented technology

The invention provides a method for separation of placenta-derived mesenchymal stem cells, and for amplification and culture in vitro. After decidual tissue cells on the side of a placenta matrix are adopted and collected, primary culture cells are amplified by adhering to wall; the placenta-derived mesenchymal stem cells are purified by adopting positive and negative immunological sorting and combination method to get CD34<->CD105<+> cells which are secondarily amplified and cultured in a serum-free culture system in vitro. By adopting the method provided by the invention, just few primary culture cells (1X10<5> cells) are needed every time to produce a good sorting result; and the purification rate of the placenta-derived mesenchymal stem cells is further improved. Not only the culture system used has significant advantage of amplification over placenta-derived mesenchymal stem cells, but also the amplified cells have multiplex differentiation potential. The method can be applied for purification of placenta-derived mesenchymal stem cells and amplification and culture in vitro.

A process for treating the offensive smell in petrochemical sewage treating plant and cleaning the low-concentration waste organic gas features use of immobilized microbial membrane as filler and 1-3 stages of microbial treatment. It includes such steps as wet dusting for pre-treating, microbial treating and post-treating by absorbent.

In an exhaust-gas after-treatment device (10,10A) having an oxygen storage capacitor substance which releases oxygen when the exhaust-gas is rich in air-fuel ratio and storages oxygen and heats up by itself when the exhaust-gas is lean in air-fuel ratio, the air-fuel ratio for the exhaust-gas flowing into the exhaust-gas after-treatment device (10,10A) is regulated so as to alternately come into a rich condition (R) and a lean condition (L) when the temperature (Tg) of the exhaust-gas is not higher than a given temperature (Tc) and when the exhaust-gas after-treatment device (10,10A) is not in the condition of being regenerated. Thus, when an exhaust-gas after-treatment device (10,10A) having a deNOx catalyst and a DPF is not in the condition of the regeneration of deNOx catalyst, DPF regeneration, or the like, the temperature of the exhaust-gas after-treatment device (10,10A) is raised by utilizing the self-heating function of the oxygen storage capacitor substance during oxygen absorption. As a result, the purification rate for NOx and PM at the time when the temperature of the exhaust-gas is low is improved.

The invention discloses a preparation method of agarose immune magnetic microspheres and applications thereof, and relates to a preparation method of microspheres and applications thereof, which solves the technical problems that an existing purified monoclonal antibody is complex in process, is low in yield, and is high in cost, and coupling agents are hypertoxic. The preparation method comprises the following steps of: 1. preparing a ferric oleate precurser; 2. preparing a magnetic fluid; 3. preparing an oil phase and a water phase; 4. preparing agarose magnetic microspheres; 5. preparing activated and crosslinked agarose magnetic microspheres; 6. preparing agarose magnetic microspheres joined with spacer arms; and 7. preparing agarose immune magnetic microspheres. The agarose immune magnetic microspheres provided by the invention are used for purifying genetic engineering recombination trastuzumab monoclonal antibodies. The agarose immune magnetic microspheres prepared by the invention are used for the field of separating and purifying the monoclonal antibodies.

The invention discloses a controlling method of an air purifier and a controlling device thereof. The controlling method comprises the following steps of: acquiring environmental parameters and air parameters of to-be-purified environment; acquiring the first clean air delivery rate and the second clean air delivery rate according to the environmental parameters and the air parameters, wherein the first clean air delivery rate is the particulate matter clean air delivery rate while the second clean air delivery rate is the gaseous pollutant clean air delivery rate; controlling particulate matters in the to-be-purified environment of the air purifier according to the first clean air delivery rate. The controlling method can solve the problem of inaccurate control and weak purification effect because the clean air delivery rate is adjusted according to shifts in the present air purifier, such that the air purifier can be precisely controlled in purification and the purification rate is also improved.

The invention discloses a waste gas treatment air purification device which comprises a unit case, a waste gas inlet pipe, and an air inlet pipe; the invention is characterized in that a water tank is disposed at the bottom inside the unit case; a photolytic light source, a filler layer, a spraying layer, and an active carbon layer are orderly mounted above the water tank; the waste gas inlet pipe and the air inlet pipe extend into the water tank at one side of the unit case. With a water-attack deduster principle, the invention allows organic waste gas to dissolve into water through high-speed air flow, performs cracking by using high-energy high-ozone ultraviolet light beams, performs air purification with the synergic photolysis of the fillers and spraying, and finally reaches the national discharge standard; the invention is simple in operation, convenient for maintenance, and integrated in structure, greatly reduces production cost, and realizes thorough purification of toxic and harmful gas.

The invention relates to an automatic and intelligent-adjusting consumable-free air purifier. A consumable-free automatic and intelligent-adjusting air purifier device is absent at present. The automatic and intelligent-adjusting consumable-free air purifier comprises a catalyst packing net, an air detecting sensor module, a screen module and a fan module. The automatic and intelligent-adjusting consumable-free air purifier is characterized by further comprising an electrostatic dust removal device and a top cover, wherein the electrostatic dust removal device comprises an electrostatic dust removal device control module and a plurality of vertical metal plates; the screen module comprises a display screen and an Android control system circuit board; the Android control system circuit board is used for analyzing and processing data detected by the air detecting sensor module, and converting current air pollutant data into an air quality index; and the electrostatic dust removal device control module is used for controlling voltage of the electrostatic dust removal device and regulating dust removal efficiency; the fan drive module is controlled to regulate air quantity of the fan and regulate purifying treatment amount, so that a purifying rate is increased when ambient air quality is relatively poor and the purifying rate is reduced when the ambient air quality is relatively good. The automatic and intelligent-adjusting consumable-free air purifier is free of consumables.

A gas purifying apparatus oxidatively decomposes and discharges impurities such as flammable hydrocarbons (C_mH_2n) contained in gas generated from a toner by fixing an image. An image forming apparatus having a gas purifying apparatus, and a method of purifying gas of the image forming apparatus are also provided. The gas purifying apparatus comprises a fan unit for ventilating air, a heating unit for heating the air ventilated by the fan unit, a catalytic unit for facilitating oxidative decomposition of impurities contained in the air, and an ozone generation unit located upstream of the heating unit and the catalytic unit in the air flow direction. By providing the ozone generation unit for facilitating the oxidative decomposition reaction by the catalytic unit for impurities contained in gas generated by fixing an image, the gas purifying rate can be improved and by minimizing the reaction area of catalyst oxidizing impurities, and reducing the manufacturing costs.

A replaceable hollow fiber membrane filter device comprising an upper cap, a lower cap, and a cartridge. The cartridge has multiple hollow fiber membrane bundles inside, and an upper and a lower membrane tube covers which are used to fix two ends of hollow fiber membrane bundles. The bottom of each hollow fiber membrane bundle has a lower membrane lagging; the top of each hollow fiber membrane bundle has an upper membrane lagging which extends outward to make a flow way; on the lower membrane tube cover there has multiple slots which conjugate with the fringe of the lower membrane lagging, and on the upper membrane tube cover there has multiple sockets which conjugate with the fringe of the upper membrane lagging, and both are seal-connected by a disassembling structure. The upper end and the lower end of each hollow fiber membrane bundle respectively goes through the upper and the lower membrane lagging, and is mounted inside the upper and the lower membrane tube cover, and seal-connected by disassembling structure. Therefore, the present invention may provide a method of replacement or cleaning single hollow fiber membrane bundle instead of replacing whole filter device, so the cost is down.

The invention relates to an integrated submersible photoelectromagnetism river and lake water purifying method and a device thereof. In the method, a sewage inhalation device, a gas-water mixer and a purifier which are successively connected are arranged at the bottom of a stream, a lake, an artificial lake, a fountain or a scenery fish pond. A water outlet of the purifier is arranged at a position near the water surface of the river and lake water; sewage water to be purified is inhaled by the sewage water inhalation device and is sprawled into the gas-water mixer in a jet flow way and at high speed after being magnetized strongly by a magnetizer; the sewage water in a gas mixing chamber of the gas-water mixer is forced to be mixed with ozone in the gas mixing chamber to compose a gas-liquid mixed flow; the mixed fluid is injected into the purifier; the high speed jet is utilized to involve and inhale sewage water near a water inlet of the purifier into the purifier; a photoelectric combined catalytic oxidation treatment is carried out on the sewage water mixed with the ozone in the purifier; then, outlet water forms a level circulating water flow on the periphery of the water outlet of the purifier to realize gradient exchange purification of the whole river and lake water. The integrated submersible photoelectromagnetism river and lake water purifying method and the device thereof have the advantages of less land occupation, little investment and operating cost and good purifying effect.

The invention relates to a method for extracting paclitaxel from taxus chinensis branches and leaves, and the method comprises the following steps of: (1) soaking 1000 kg of pulverized taxus chinensis branches and leaves by using 5 m<3> of methanol, and filtering; (2) decoloring filter liquor; (3) decompressing and concentrating a decolored solution, and extracting; (4) degreasing and dewaxing extract liquor, crystallizing, depositing, filtering, and drying to obtain a primary product; (5) removing impurities contained in the primary product in a silicagel column, carrying out gradient elution, collecting paclitaxel-containing elution flows, and decompressing and concentrating to obtain a crude product; (6) stirring the crude product into silica gel, packing, carrying out gradient elution, collecting the paclitaxel-containing elution flows, and decompressing and concentrating to obtain a semi-finished product; (7) dissolving the semi-finished product, adding petroleum ether, standing, filtering, and drying to obtain a semi-finished product with the content more than or equal to 30%; (8) removing the impurities contained in the semi-finished product obtained from the step (7) in a silicagel column, carrying out gradient elution, collecting the paclitaxel-containing elution flows, and decompressing and concentrating to obtain a semi-finished product with the content more than or equal to 95%; and (9) dissolving the semi-finished product obtained from the step (8), filtering, adding normal hexane, standing, carrying out suction filtration; and drying to obtain a finished product with the content more than or equal to 99%.

A quantity of a purifying agent that is added into an exhaust gas, reacts with a specific component in the exhaust gas, and purifies the exhaust gas is controlled. A controller is configured so as to be provided with a program to carry out either increment control for increasing the quantity of urea water sequentially or decrement control for decreasing the quantity of the urea water sequentially while monitoring, in NOx in the exhaust gas, the quantity not purified through the reaction with NH₃ (the discharged NOx quantity); and switch the quantity control from the currently adopted increment or decrement control to the other increment or decrement control in response to whether the feature of the change of the discharged NOx quantity comes to a predetermined feature.

The catalyst in regular structure includes carrier in regular structure and active component coating distributed in the inner surface and/or outer surface of the carrier, with the thickness of the active component coating being in gradient distribution along pore canal axis of the carrier. Using the catalyst in regular structure can reduce the olefin content in FCC gasoline effectively from 43.6 wt% to 17.2 wt%, and convert 50.2 % of the converted olefin into propylene and ethylene. When the catalyst is used as the automobile tail gas catalyst, it can lower the ignition temperature of the tail gas by 30deg.c and raise the tail gas purifying rate up to 95 %.

The invention provides a high voltage generating apparatus which comprise high voltage generating rods, high voltage generating needles, a high voltage generating rod installing plate, a framework and a cellular separator plate. The high voltage generating rod installing plate is provided with a plurality of air through holes, one end of one high voltage generating rod is fixed on the front of the high voltage generating rod installing plate, the other end of the high voltage generating rod is in fixed connection with one high voltage generating needle, and the high voltage generating rod and the high voltage generating needle fixed by the high voltage generating rod are coaxial; the cellular separator plate is opposite to the front of the high voltage generating rod installing plate and comprises partition plates with an cellular opening, the framework in fixed connection with the cellular separator plate is covered over the cellular separator plate and is in fixed connection with the high voltage generating rod installing plate through insulating parts, and each high voltage generating rod and a corresponding high voltage generating needle fixed by the high voltage generating rod are located at a corresponding cellular opening on the cellular separator plate; the high voltage generating rod installing plate, the cellular separator plate, the high voltage generating rods and the high voltage generating needles are all made of a metal material. The high voltage generating apparatus provided in the invention enables fine-particle pollutants in the air to be eliminated through high voltage.

When deterioration of a NOx purifying device due to sulfur contamination is detected, a specific operating state flag FHL is set to "1," and, at intervals equal to or shorter than, for example, three seconds, the air-fuel ratio of an air-fuel mixture to be supplied to an engine is varied so that it is alternately leaner and richer than the stoichiometric air-fuel ratio. When the temperature TCAT of the NOx purifying device exceeds a deterioration recovery temperature STCAT2 while the air-fuel ratio variation control is being executed, the SOx removing flag FHLSOx is set to "1," and for a period equivalent to the deterioration recovery time TRSOx, the air-fuel ratio is maintained richer than the stoichiometric air-fuel ratio.

The invention discloses a preparation method for an SCR catalyst for purifying oxynitride in motor vehicle exhaust .The preparation method includes the steps of preparation of an SSZ-13 molecular sieve, preparation of a Cu-SSZ-13 catalyst and preparation of an integrated SCR catalyst .The preparation method is simple, production cost is lowered, SSZ-13 crystallization time is short, crystallization is relatively pure, HN3-SCR catalytic activity is high, and the purification rate of oxynitride in motor vehicle exhaust is high.

The invention relates to a domestic sewage treatment method, in particular to a method for realizing a terrace type composite vertical flow forest wetland on a hillside land and applying the forest wetland to rural domestic sewage treatment. The method is characterized by comprising the following steps that: a hilly hillside land is changed into a terrace; the terrace is constructed to be a terrace type composite vertical flow constructed wetland 3; plants and fillers of the terrace wetland 3 are the same as those of the conventional constructed wetland, but an upper level of the terrace wetland 3 is communicated with a lower level of the terrace wetland 3 through a forest surface flow wetland 4; and sewage is over-flown into the forest surface flow wetland 4 through downward flow wetland 31 and upward flow wetland 32 of the upper level of the terrace wetland 3, and enters the next level of the terrace wetland 3 for further treatment through the forest surface flow wetland 4. The invention has the advantages of high purification rate and adaptability, convenience of management, low cost, is easy to implement and is particularly suitable for rural domestic sewage treatment in hilly areas.

The invention discloses an electric mist precipitator for smoke purification. The electric mist precipitator for smoke purification comprises a shell, anode plate rows and cathode pipe rows, wherein the anode plate rows and the cathode pipe rows are arranged in the shell; in the flowing direction of smoke, the anode plate rows and the cathode pipe rows are arranged in an inclining manner; therefore, when smoke enters the shell, the contact areas between the smoke and the anode plate rows and between the smoke and the cathode pipe rows are large, the needed number of the anode plate rows and the cathode pipe rows is small while it is ensured that the electric mist precipitator has the higher smoke purification rate, and therefore the electric mist precipitator is more compact in structure and smaller in occupied space, and the mounting flexibility is improved; the electric mist precipitator is mainly applied to the top smoke purification process of a wet method desulfurizing tower; through the reasonable model selection, a wet method desulfurizing original mechanical mist precipitating device can be replaced, and the smoke dust removal and mist precipitating process after the wet method desulfurizing can be independently finished.

The invention relates to an automatic high-efficiency energy-saving purification system for industrial volatilizable organic pollutants, which is characterized in that: (1) both opposite side walls of an active carbon bed body of an adsorption bed are set into side walls with hollow structures, an active carbon clapboard is set into an active carbon clapboard with a hollow structure, the active carbon clapboard with the hollow structure is communicated with the side walls with the hollow structures, and the two side walls with the hollow structures are respectively provided with a hot air inlet and a hot air outlet; and (2) a catalytic combustion bed is connected with a plate-type heat exchanger, and the plate-type heat exchanger is connected with the hot air inlets on the side walls withthe hollow structures of the adsorption bed through an adsorption bed heating fan. The automatic high-efficiency energy-saving purification system for the for industrial volatilizable organic pollutants has a simple and reasonable structure, can effectively reduce energy consumption, improve the purifying rate, prolong the service life of a catalyst, shorten the desorption process time, improve the purifying efficiency and reduce the operating cost, and is safe and reliable.