225results about How to "Reduce filtration efficiency" patented technology

Electret filter media comprising a nonwoven web of thermoplastic nonconductive microfibers having trapped charge, said charge provided by (1) subjecting the nonwoven web to a corona treatment, followed by (2) impingement of jets of water or a stream of water droplets on the web at a pressure sufficient to provide the web with filtration enhancing electret charge and (3) drying the web. This electret filter media may be used in a respiratory mask to provide extraordinarily good filtration properties.

The invention relates to the technical field of demulsifier production, in particular to a filter with a particulate matter separation function for oil field demulsifier production. The technical problems that separated particle impurities are inconvenient to discharge out of a filtering device, normal use of the filtering device is reduced, and the filtering efficiency of a demulsifier is reduced are solved. According to the technical scheme, the filter with the particulate matter separation function for oil field demulsifier production comprises a supporting shell, a feeding mechanism, a vibration filtering mechanism and the like, the inner side face of the bottom of the supporting shell is provided with a protrusion, the feeding mechanism is arranged above the supporting shell, and the vibration filtering mechanism is arranged on the upper portion of the inner side face of the supporting shell. By designing the feeding mechanism, non-uniform discharging of an oil field demulsifier caused by different pressures of the oil field demulsifier to the bottom of the material containing shell is avoided, by designing the vibration filtering mechanism, the filtering efficiency of the sieve plate is improved, and meanwhile, the situation that too many impurity particles are accumulated, and filtering holes in the sieve plate are blocked is avoided.

A method and apparatus for filtering gas (58) with a moving granular filter bed (48) involves moving a mass of particulate filter material (48) downwardly through a filter compartment (35); tangentially introducing gas into the compartment (54) to move in a cyclonic path downwardly around the moving filter material (48); diverting the cyclonic path (58) to a vertical path (62) to cause the gas to directly interface with the particulate filter material (48); thence causing the gas to move upwardly through the filter material (48) through a screened partition (24, 32) into a static upper compartment (22) of a filter compartment for exodus (56) of the gas which has passed through the particulate filter material (48).

The invention discloses a cutting fluid recovering device for machining. The cutting fluid recovering device comprises a bracket, wherein a second collecting box, a separating cabin and an absorbing cabin are successively fixed on the bracket; the second collecting box is connected with the bottom of one side of the separating cabin through a guide slot; the middle part on the other side of the separating cabin is connected with the top end of the absorbing cabin through a guide pipe; a filtering box and a third collecting box are successively connected with the bottom of the absorbing cabin through a liquid draining pipe; a filtering plate is fixed on the upper part in the separating cabin; a rotating shaft of a motor extends into the separating cabin and is fixed with a grating plate; anabsorbing column is arranged in the absorbing cabin; a wire is arranged in an interlayer; the bottom of the absorbing cabin is in threaded connection with the top of a first collecting box. Accordingto the invention, the filtering plate, the grating plate, the absorbing column and the filtering box are adopted for treating the cutting fluid in turn, so that the impurities in the cutting fluid can be effectively removed, the device has a self-cleaning function, the recycling efficiency of the cutting fluid is guaranteed and the maintenance frequency is reduced.

The invention discloses an antibiosis and haze prevention mask which comprises a surface layer and a lining, and an antibiosis and haze prevention functional layer is arranged between the surface layer and the lining. The functional layer is composed of a first fiber layer, a silver-loaded short fiber non-woven fabric layer, a silver-loaded filament filter layer, an efficient filter layer and a second fiber layer from outside to inside; the first fiber layer and the second fiber layer are each composed of linen cloth or cotton and linen cloth or all cotton cloth or blended cloth; the silver-loaded short fiber non-woven fabric layer is composed of polypropylene fiber or terylene non-woven fabric, and a layer of nano-silver is arranged on the surface of the non-woven fabric; the silver-loaded filament filter layer is composed of multiple filaments, the filaments are hollow polyester filaments, the line diameter of the filaments is 20-30 micrometers, and nano-silver is impregnated in a hollow inner cavity of each filament; the efficient filter layer is composed of polypropylene ultra-thin fiber, and the surface of the polypropylene ultra-thin fiber is coated with teflon. The antibiosis and haze prevention mask has the advantages of being resistant to bacteria, and capable of preventing haze and being used repeatedly.

The invention relates to a water-soluble cutting fluid recovery treatment method which comprises the following steps: S1, collecting a cutting fluid; S2, removing oil stain of the cutting fluid, namely pouring off and removing sundries such as oil stain floating on the liquid level of the cutting fluid in the step S1; S3, pouring the cutting fluid; S4, filtering the cutting fluid; and S5, recovering the cutting fluid. Corresponding treatment operation of operation procedures of steps S1-S5 of the water-soluble cutting fluid recovery treatment method is completed through cooperation of a stirring bucket, a stirring motor, a stirring rod, blades, an adsorption mechanism, a sealing plate, a filtering net and a recovery bucket. By adopting the method, problems that in conventional operation that a cutting fluid is filtered, the cutting fluid is filtered in a multistage filtration mode generally, the cutting fluid is fed through filter paper of different models to achieve the purpose of removing sundries, but the filter paper can be blocked or scratched by the sundries in the cutting fluid, the cutting fluid is poor in filtration effect, and the filter paper needs to be artificially shaken frequently, can be solved.

The invention discloses a factory building welding exhaust gas purification apparatus. The apparatus comprises a welding fume purifier, a welding fume purifying device is arranged in the welding fumepurifier, a cleaning device is arranged in the welding fume purifying device, a vacuum gas suction and recovery device is arranged below the welding fume purifying device, a universal telescopic gas suction tube device is arranged above the vacuum gas suction and recovery device, a cleaning device is arranged below the side surface of the welding fume purifier, a rotatable connecting short rod isarranged in the universal telescopic gas suction tube, the connecting short rod swings to drive the universal telescopic gas suction tube to move to purify fume, and the gas suction using a gas suction pump makes the universal telescopic gas suction tube return into the welding fume purifier to make the apparatus conveniently used by a user. The apparatus has the advantages of simple structure andstrong practicability.

Provided is an electrically charged filter which has a high initial filtering efficiency and is not liable to decline in filtering efficiency, by including a liquid-charged nonwoven fabric layer that is charged by application of force via a polar liquid, and a tribo-electrically charged nonwoven fabric layer that is charged by friction between fiber components of a plurality of types.

Provided is a suction type filtering-condensing apparatus which does not reduce filtering efficiency and can guarantee filtering performance. The apparatus comprises a filtering-condensing bath (12) for housing treated fluid including filtering-condensing objects, and a plurality of filter plates (14) arranged in the filtering-condensing bath (12) and extending vertically along the filtering-condensing bath (12). Each of the filter plates (14) includes a support plate (50) vertically rugged in its surface and formed into a net shape, and a bag-shaped filter cloth (18) for housing the support plate (50), so that a filter chamber (76) is formed by the inner face of the filter cloth (18) and the support plate (50), and so that a vertically extending main passage for the filtrate is formed between the inner face of the filter cloth (18) and the recess of the support plate (50). Further comprised are a suction means (16) for sucking the filter cloth (18) through the filtering-condensing bath (12), a filter cloth bulging means (20) for bulging the filter cloth (18) through the filtering-condensing bath (12), and a filtrate discharging pipe (38) communicating at its one end with the filter chamber (76). The suction type filtering-condensing apparatus is characterized in that the transverse length of the filter cloth (18) is set larger than the transverse length of the support plate (50), and in that a temporary auxiliary passage (99) for the filtrate is formed, at the time of filtration and condensation of the filtering-condensing objects in the filtering-condensing bath(12)undera predetermined negative pressure according to the suction means (16), to communicate with the filter chamber (76) and to extend vertically of the filter chamber (76).

The present invention relates to a method for producing fermentation product from various carbon sources containing glycerol using Corynebacteria. More particularly, the present invention relates to a method for producing fermentation product from carbon sources containing glycerol or a part of glycerol with high yield and high productivity, by fermenting Corynebacteria introduced with the foreign gene glpDFK facilitating the use of glycerol and accumulating industrially useful amino acids in the culture medium.