205results about How to "Reduce the likelihood of clogging" patented technology

This invention relates to waste-water treatment process by using batch-type aerobic granular sludge membrane reactor. The procedures are: influent of domestic sewage being fed-in, aeration, intermittent drainage, settlement, drainage and reflux. This invention method makes the sludge in the reactor being of granulated. The whole system proceeds, periodically, aerobic, anaerobic and facultative aerobic condition treatment; so, it can remove carbon-containing organic pollutants, and also nitrogen and phosphorus nutritive elements and the like. This inventive method is used for treatment of urban domestic sewage, with COD removal rate being up to more than 95%, the ammonia-nitrogen being kept less than 1mg / L, total nitrogen and total phosphorus removal rate being more than 90% and 45% respectively. This invention method reduces, obviously, membrane contamination, lowers the speed of reducing rate of membrane-flux by 50%. And the membrane-flux can be recovered to original condition just by hydraulic washing. The inventive method can produce excellent economic benefit and environmental benefit.

A gas restrictor particularly useful for application in gas bearings as used, for example, in free-piston Stirling cycle machinery. Porous strip material (52) together with a backing plate (60) and orifice (32) is used to provide the restriction to the flow of gas into an annular gap (22) between a piston (16) and a cylinder (12).

The invention discloses a CART-based decision-making tree construction method in cognitive computation. The method comprises the following steps: initializing a root node of a decision-making tree and a characteristic attribute set corresponding to the root node according to establishment rules of the decision-making tree; carrying out sorting of data in a training set; judging whether all sample data in a node is of the same type or not; calculating the optimum characteristic attributes and the suboptimum characteristic attributes of the node to be split; judging whether the node satisfies the selected optimum splitting attributes and splitting conditions of an interruption mechanism or not; if the node satisfies the selected optimum splitting attributes and the splitting conditions of the interruption mechanism, carrying out splitting through the optimum splitting attributes, then iteratively replacing a current node with the node split through the characteristic attributes, and adding two new leaf nodes respectively from a left branch and a right branch, so as to achieve automatic splitting of the decision-making tree; and if the node does not satisfy the selected optimum splitting attributes or the splitting conditions of the interruption mechanism, waiting for data stream inputs, carrying out sample updating, and continuing to calculate node splitting. The method provided by the invention has the advantages that the accuracy of data stream processing is further improved, so that the possibility of system blocking is reduced.

A projectile-loading assembly (1) for an air-powered gun is configured to load projectiles (3) in a barrel (4) and includes a magazine module (10) and a slider module (20). The magazine module (10) includes a projectile chamber (11), a rail tube (14) located over the projectile chamber (11) to be aligned with the barrel (4), and a projectile-loading block (15) sheathed the rail tube (14). The slider module (20) slides with respect to the barrel (4) and includes: a spring (21) for pushing the projectile-loading block (15) to depart from the barrel (4), and an elastic piece (22) for pushing the projectile-loading block (15) to approach the barrel (4). The elastic piece (22) pushes the projectile-loading block (15) to slide toward the barrel (4) when the slider module (20) slides forwards, thereby pushing one projectile (3) into the barrel (4) while closing the projectile chamber (11).

A discharge system for an agricultural harvester provides an air curtain that shields straw, chaff and other crop residue from the wind. The system includes a blower adapted for mounting to an agricultural harvester and having an intake side and a discharge side and a plenum fluidly connected to the discharge side of the blower. The plenum is arranged and disposed to distribute air exiting the discharge side of the blower to form an air curtain according to a predetermined profile at a location adjacent discharge that exits a rear door of the agricultural harvester as a windrow.

The invention discloses a pneumatic typethermal blockage dredging filter screen based on waste gas and dust purification, and belongs to the technical field of waste gas purification. According to thescheme, when a first filter screen is blocked, the air pressure on the left side of the first filter screen can be gradually increased, so that part of waste gas is promoted to fully react with reductive iron powder, and therefore, the temperature of a memory alloy spring increases, metal blockage dredging fiber ropes are pushed to move rightward to break granular materials accumulated on the left side of the first filter screen; when the waste gas enters an air impact balloon, a pneumatic rotating plate can be promoted to rotate, so that a built-in air bag ball is driven to rotate; along with the rotation of the built-in air bag ball, ferric ferrous oxide obtained after reacting reductive iron powder and oxygen is adsorbed, the reaction between oxygen in the waste gas and the reductive iron powder can be promoted by means of swing of thepneumatic rotating plate, so that the heat production efficiency is improved; and after the temperature is reduced, the memory alloy spring is promoted to recover to the low-temperature phase state thereof, so that the metal blockage dredging fiber ropes are dragged to reset.

The invention belongs to the technical field of silicon dioxide aerogel thermal insulation materials, and particularly relates to a preparation method of a silicon dioxide aerogel thermal insulation filler. The preparation method comprises the following steps: dissolving an inorganic foaming agent in water, adding silicon dioxide aerogel, and uniformly stirring and mixing to obtain nonporous silicon dioxide aerogel; melting paraffin at 50-70 DEG C, uniformly grinding the paraffin and calcium chloride, spraying the obtained mixture on the surface of the prepared nonporous silicon dioxide aerogel, adding the sprayed nonporous silicon dioxide aerogel into water, stirring, and adding an inorganic dispersing agent to completely disperse the silicon dioxide aerogel of which the surface is coatedwith the paraffin in the water to obtain a dispersion system; and adding sodium carbonate into the dispersion system, stirring until calcium chloride in the paraffin coated on the surface of the silicon dioxide aerogel and sodium carbonate form a calcium carbonate coating layer, centrifugally filtering, and drying at 60-80 DEG C for 15-24 hours to obtain the silicon dioxide aerogel thermal insulation filler.

The invention provides a nozzle needle tip calibration method and a low-temperature printing platform based on a 3D printer. The nozzle needle tip calibration method includes the following steps thatS01, a quick positioning stage is carried out, specifically, a controller drives a nozzle needle tip to be close to a position sensor at a speed V2, so that the needle tip drives the calibration planeof the position sensor to generate a retraction displacement L2, and the controller calculates the initial calibration height H of the calibration plane between the needle tip and the position sensoraccording to the retraction displacement L2; S02, a stage which returns to secondary calibration height is carried out, specifically, the controller drives the nozzle needle tip to move an L2+L3 distance in the opposite direction at a speed V3, wherein H is more than L3, and L3 is more than 0; and S03, a low-speed calibration stage is carried out, specifically, the controller drives the needle tip to move toward the calibration plane at a speed V4, so that the needle tip drives the calibration plane of the position sensor to generate a retraction displacement L4, and the calibration process is completed. Through the nozzle needle tip calibration method and the low-temperature printing platform based on the 3D printer, more rapid and efficient nozzle needle tip calibration can be achieved.

The invention relates to a riverbed cleaning method, in particular to a sand pumping method for riverbed sediment of a heavily silt-carrying river reservoir, and belongs to the field of water conservancy. The IPC number is E02B 3 / 02 and E02D 17 / 16. According to the sand pumping method, a mud sucking device comprising a plurality of reamers and a plurality of spraying guns is adopted for sediment crushing and stirring, so that deposited mud keeps suspended to form a high-concentration muddy water field; meanwhile, auxiliary facilities such as a filtering grid and a protective cover for isolating muddy water are arranged, so that an enough number of muddy water suction operation areas with the relatively stable concentration are formed more effectively, the reservoir desilting efficiency is greatly improved, great social benefits and economic benefits are achieved, and the reservoir sand pumping method is significant.

The invention utilizes a layered manufacturing process to produce an article (2) having at least one small-width fluid conduction vent (6) produced during the layered manufacturing process. Such small-width fluid conduction vents (6) may have any desirable cross-sectional shape, orientation, and curvature. The invention also includes articles (2) containing at least one small-width fluid conduction vent (6) wherein the article (2) and the small-width vent or vents (6) are simultaneously produced by a layered manufacturing process.

A drug delivery device for delivering a drug to a preselected treatment site, includes a rupturable film capsule enclosing a quantity of the drug to be delivered; an array of micro-needles formed with passageways therethrough carried by the device; a covering layer overlying the capsule and forming a fluid-tight seal with the perimeter of the micro-needle array such that when the device is located with the micro-needles facing the treatment site, the application of pressure to the device causes the micro-needles to penetrate the treatment site and the capsule film to rupture to deliver the drug via the passageways to the treatment site; and an open mesh layer adjacent to the array of micro-needles effective, upon rupture of the capsule film, to uniformly distribute the drug to the micro-needles and also to reduce the possibility of clogging of the passageways.