84results about How to "Optimize dwell time" patented technology

A microgranular bait for the fry of Epinephelus is prepared from crude protein, crude fat, phosphatide, ash, n-3HUFA, DHA/EPA, DHA, and EPA according to a certain proportion through enzymolyzing by proteinase, further adding antioxidizing agent, filtering, and spray drying. Its advantages are rich nutrients, and low settling speed.

The invention discloses an edge precision control method of a large aperture optical element being processed through air bag polishing, and relates to a method for controlling edge precision in an air bag polishing element processing process, belonging to the field of optical processing. With the adoption of the edge precision control method, the problems that in the existing optical element processing process, in order to overcome 'edge effect', the risk of damaging main face precision is high, the cost is high, and the efficiency is low are solved. The method comprises the following steps: acquiring an edge area removing function of materials corresponding to the element to be processed; establishing an edge area removing function library of the element to be processed; calculating the width of an edge area of the element to be processed according to gap m of a polishing path and compression amount fi of a polishing air bag; extracting the corresponding removing function; setting residence time tn of the edge area removing function; carrying out error contour predication calculation on the edge area of the element to be processed, so as to acquire surface-shape error of the edge area of the element to be processed; estimating the surface-shape error; and acquiring a residence time value of the removing function responding to the edge position of the element to be processed, so as to generate a polishing file ,and executing a polishing process. The edge precision control method provided by the invention can be widely applied in the edge precision control processing process of large aperture opt elements.

The invention discloses a continuous casting tundish for improving cleanliness of molten steel and belongs to the field of ferrous metallurgy technology. The continuous casting tundish comprises a tundish, porous bricks, an overflow groove, a slag blocking wall and a dam. The continuous casting tundish for improving cleanliness of molten steel provided by the invention makes full use of the double effects of argon foam stirring and cleaning, is safe, practical, simple and convenient, can obviously improve the separation effect of impurities and gases in the molten steel and improve the cleanliness of the molten steel and the quality of billet steel and the like.

The invention provides a structural design scheme for a mini type engine combustion chamber flame barrel with air inlet flow guiding blades. The air inlet flow guiding blades are arranged at the position, close to the front end of the flame barrel, of a flame barrel shell, so that airflow entering the flame barrel through a main combustion hole has the component of velocity in the axial direction,the radial direction and the circumferential direction, a backflow area can be formed by the rotation airflow in the flame barrel, the airflow structure in the flame barrel is effectively improved, the airflow speed is reduced, and the combustion stability of a mini type engine combustion chamber is improved; and due to existence of the backflow area, the airflow turbulivity is improved, fuel oiland fresh air mixing is more sufficient, combustion is safer, and the combustion efficiency is greatly improved.

The invention provides compounds of Formula I:

wherein Azabicyclo is

These compounds may be in the form of pharmaceutical salts or compositions, may be in pure enantiomeric form or racemic mixtures, and are useful in pharmaceuticals in which α7 is known to be involved.

The invention relates to a drug composition conducive to improvement of memory and adjunctive treatment of senile dementia. The drug composition provided by the invention is characterized by being prepared from ginseng, ginkgo leaves, grape seeds, purple perilla seed oil and egg yolk lecithin, and synergistic effects of the components are utilized to prepare oral preparations such as hard capsules, soft capsules, tablets, granules, powder and pills. The drug composition provided by the invention can be applied to a Chinese patent drug or health-care food, and has an effect of being conducive to improvement of memory and adjunctive treatment of senile dementia.

The invention discloses a module combined-typed photocatalyst contamination processing system, which mainly arranges a plurality of photocatalytic carrier structure parts in a shell in the serial way or parallel way or serial and parallel way to constitute the photocatalyst contamination processing system. The contamination processing system can be combined in serial and/or parallel way by selecting and using independent processing modules with suitable quantity according to the design scale of the contamination processing system. The invention simplifies and facilitates the design of the photocatalyst contamination processing system which is the same convenient as the module combination. The contamination processing system with modularization design not only can increase the processing ability of the processing system to the contamination according to the requirement, but also can improve the circulation path of the contamination processing by simple modularization combination, and improve the stopping time of the contamination fluid in the processing system, namely the contacting reaction time with the photocatalyst carrier, thus obtaining more effective contamination processing system.

Methods and apparatuses for implementing magnetic field to assist PECVD to locally or globally coat the internal surface of the work piece are presented. Several permanent magnet assembly designs have been presented to provide efficient and effective magnetic field inside the work piece, which acts partially as the working chamber. The magnet assembly generates magnetic flux inside the working chamber, which increases the efficiency of PECVD process, enable PECVD process under higher gas pressure and to improve the uniformity, deposition rate, better adhesion and reduce the process temperature.

The present invention relates to an overfired air (OFA) nozzle for coal powder boiler or furnace; said overfire air (OFA) nozzle can be used for injecting overfined air (OFA) from side wall so as to increase stationary time of burner layer. Said invention can use several OFA nozzles, and said OFA nozzles can be vertically and horizontally alternatively arranged, so that in the proper time and position the overfired air can be effectively inputted into the burner flame so as to effectively reduce formation of fuel NOx. Said invention also provides the OFA structure for single-wall type or opposed-wall type boiler and furnace.

The invention discloses a supercharged atomization dust fall type electrostatic dust collection device, comprising a device body which is mainly composed of a dust fall area, a supercharged depression area, a drying area, an electrostatic adsorption area, a smoke inlet, an exhaust outlet and a slurry outlet, wherein a rotating shaft is vertically arranged in the device body; the rotating shaft is positioned in the atomization dust fall area and provided with external threads on the surface; a moving component is arranged on the rotating shaft in a sleeved manner; the moving component is fixedly connected with a sliding plate; a water tank is arranged at the bottom in the atomization depression area; a piston plate is arranged in the water tank; a lead screw is vertically arranged in the atomization dust fall area; a through hole is formed in the sliding plate; internal threads are formed in the through hole; the lead screw is in threaded connection with the through hole; the lead screw is in threaded connection with the piston plate; a rotating disk is arranged in the electrostatic adsorption area; the rotating disk is fixedly connected with the rotating shaft; a slide rail is arranged on the rotating disk; and the inner part of the slide rail is in slip connection with an electrostatic plate. The device has a good dedusting effect on smoke, long retention time and dead angle-free electrostatic adsorption.

A process for the preparation of a polyolefin in at least two slurry loop reactors including a first loop reactor connected in series with a second loop reactor includes introducing olefin reactants, diluents and polymerization catalyst into the first loop reactor while circulating. The process includes polymerizing the olefin reactants to produce a polyolefin slurry, withdrawing the polyolefin slurry from the first loop reactor, and introducing withdrawn articles into the second loop reactor by means of settling legs. Each settling leg has an inlet connected to the first loop reactor and an outlet connected to the second loop reactor by means of a transfer line. At least one settling leg is continuously open allowing continuous transfer of solid olefin polymer particles from the first to the second loop reactor. The process includes controlling the continuous transfer of solid olefin polymer particles by the at least one continuously open settling leg.

The invention discloses a chloroquine spray and a preparation method thereof. The spray consists of a powder and a solution, wherein the powder contains chloroquine or a chloroquine derivative, a carrier macromolecular material and a sweetening agent, and the solution is a salt solution containing borneol and/ or menthol. The spray containing a chloroquine medicament is developed for the first time, has small toxic and side effects, can be directly used for antibacterial and antiviral protection of the oral and nasopharynx, can be used for clearing the nose and cleaning the pharynx and throat,and has the original clinical treatment application. Meanwhile, the method utilizes the carrier macromolecular material to wrap the chloroquine, prolongs the retention time of the chloroquine spray in the oral mucosa or the nasal mucosa to achieve the effect of slow release and long-acting, and can obviously improve the bacteriostatic disinfection effect of the chloroquine by being supplemented with menthol, borneol and ethanol. The chloroquine spray is mild and non-irritating, has good taste and convenient use, and can provide normal care for healthy people and more effective prevention andtreatment measures for infected or latent people in the aspects of virus protection such as novel coronavirus and the like.

The invention discloses an enclosed-type photo-catalytic-carrier structure and the pollutant disposal system. The structure includes a plurality of photo-catalytic-carrier sheets and ultraviolet sources, wherein, all sheets are photo-catalytic-carrier porosint sheets, with a plurality of sheets are arranged and combined around the ultraviolet source; photo-catalysts are carried on the surface of each sheet; clearances for pollutant fluid to flow are left between each sheet and are enclosed or partly-enclosed. While the pollutant fluid flows through the carrier structure, the pollutant fluid flows from the corresponding clearance after resorting in cavities, so that the circulation path and the residence time of the pollutant fluid are changed. As the photo-catalysts on the carriers can be fully contacted, the contacting probability between the pollutant fluid and photo-catalytic carriers is increased, so that the pollutant disposal capacity is enhanced and the purification efficiency of carrier structure or the pollutant system formed by carrier structures to the pollutant fluid is greatly improved.

The invention discloses an efficient purifying method for exhausted tail gases from firing of gangue baked bricks in a portable tunnel kiln. The efficient purifying method comprises the following process steps of stacking raw materials: stacking green gangue bricks and limestone in an annular kiln bottom between annular tracks of the portable tunnel kiln; roasting the green gangue bricks and the limestone in the kiln to desulfurize: roasting the green gangue bricks and the limestone in an arc kiln body according to a certain temperature raising procedure, and performing primary desulfurization by high-temperature roasting; performing wet flue gas desulfurization: feeding the calcined limestone into a desulfurizing liquid adjusting pool, and adjusting the basic strength in the adjusting pool; introducing tail gases in the kiln body into a desulfurizing tower, sprinkling the desulfurizing liquid in the desulfurizing liquid adjusting pool into the desulfurizing tower, and performing secondary desulfurization by a chemical reaction generated in the desulfurizing tower. According to the efficient purifying method disclosed the invention, by the adoption of a combined desulfurization method of desulfurization by roasting in the kiln and the wet flue gas desulfurization, the problems of desulfurization and purification of the tail gases in the portable tunnel kiln are successfully solved; meanwhile, energy sources can be saved, and the purification cost is reduced.

The invention relates to a method for preparing butyraldehyde from propylene and synthesis gas, and mainly solves the problems that a second reactor has low conversion rate and capacity and a catalyst has short life cycle and high production cost in the prior art. The method comprises the following steps of: a) allowing material flow I containing propylene, synthesis gas and a catalyst to enter a first reactor I, and reacting to obtain vapor phase material flow II on the tower top and liquid phase material flow III on the tower bottom; b) allowing the material flow III to enter a middle separation unit 3, separating to obtain material flow IV containing propylene and butyraldehyde, material flow V containing a catalyst and butyraldehyde, a crude butyraldehyde product material flow VI, and allowing the material flow VI to enter a subsequent process; and c) allowing the material flow II, the material flow IV, the material flow V and make-up synthesis gas to enter a second reactor, and reacting to obtain material flow VII containing butyraldehyde and tail gas 5. The method better solves the problems and can be applied to industrial production of preparing butyraldehyde from propylene and synthesis gas.