65results about How to "Efficient filtering effect" patented technology

The invention discloses a finite impulse response (FIR) filter, which consists of a filtering coefficient buffer, a to-be-filtered data buffer, a multiplier, an accumulator, an accumulating register and a comparator, wherein the filtering coefficient buffer is used for buffering coefficients which are used in the filter; the to-be-filtered data buffer is used for buffering data to be filtered; the multiplier is used for computing a product of a single filter coefficient multiplied by BS data to be filtered; the accumulator is used for computing a sum of the output of the multiplier and the output of the accumulating register; the accumulating register is used for storing a result of the accumulator; and the output of the comparator is used for indicating whether the current output of the accumulator is filtering output. By adoption of the FIR filter, high efficiency of parallel computation can be realized.

The invention discloses an indoor positioning method based on adaptive non-trace Kalman filtering. The indoor positioning method comprises the steps that router signals received at the sampling pointare collected according to the indoor environment and combined into a fingerprint storage database, a router signal sequence is collected in real time, the sequence and a fingerprint in the database are matched, and the approximate position is estimated to be obtained; acceleration, angular acceleration and magnetic field strength data are obtained through a sensor, and the step length and direction during travelling are obtained through a step length detection algorithm and a course calculation algorithm in a track calculation algorithm correspondingly; and system equation and measurement equation models suitable for a non-trace Kalman filtering algorithm are constructed through estimated position information and step length and direction information, adaptive noise scaling factors are designed according to a deviation of an observed value and a posterior estimation value, the variance of process noise at the current moment is corrected, and finally the position is estimated through iteration updating. According to the indoor positioning method, excellent performance of filtering under the conditions of unknown models and pedestrian state variability can be achieved, and long-termand stable positioning accuracy is guaranteed.

The invention discloses a negative pressure filtering system based on a PLC automatic control system and a filtering method thereof. The negative pressure filtering system comprises a filter pressingbox, and a primary filtering box and a settling box, which are fixedly connected with the top of the filter pressing box. The front surface of the primary filtering box is fixedly connected with a control panel. The invention relates to the technical field of filtering devices. The effect of continuously pumping and discharging sewage primarily filtered by the primary filtering box can be realized; an electric push rod is used for providing driving force; relative to the use of a pump, pressure is applied more stably, the pumping and discharging speed is also convenient to adjust; an efficientfilter effect is maintained, a filter cone is arranged and matched with a filter membrane on the side face to carry out fine filtration of sewage obtained after primary filtration, the filtering quality can be effectively guaranteed, meanwhile, filter residues can be concentrated in the middle, a purified water discharging pipe can be directly opened to discharge waste residues, when the waste residues need to be discharged, the filter cone does not need to be detached and taken out for cleaning, cleaning is easier and more convenient, and the maintenance time is greatly saved.

The invention discloses a making method of hemp root bast filter paper for an anti-fog and anti-haze mask. The making method comprises the steps that hemp root bast is sequentially subjected to cutting, steaming, bleaching, defibering, pulping, papermaking, squeezing and drying. The thick and hard hemp root bast is made into the hemp root bast filter paper with large thickness, high quantitation, large hole diameter and high porosity, and reutilization of waste textiles is achieved. The filter efficiency of the made hemp root bast filter paper on NaCl aerosol particles with the size of 0.26 micrometer, the density of 15.6 mg/m<3> and the concentration of 2% reaches up to 99.94%-100%, and therefore the hemp root bast filter paper has the high air particle filter efficiency, can be applied to the anti-fog and anti-haze mask and has an efficient filter effect and a wide market application prospect.

The invention relates to the technical field of sewage pump stations, and discloses an anti-silting sewage pump station. The anti-silting sewage pump station is characterized in that a crushing assembly is fixedly mounted on the upper surface of a water collecting tank and above a crushing cavity, a cleaning assembly is arranged on the rear surface of the water collecting tank, a sewage draining opening is formed in the front surface of the water collecting tank, and a gate is slidably mounted on the front surface of the sewage draining opening. Two sides of the gate are slidably mounted in afixing base, a deodorization assembly is embedded in the upper surface of the water collecting tank, by arranging the assembly, impurities in sewage entering the crushing cavity from a water inlet canbe crushed, and the blocking phenomenon can be effectively avoided. By arranging the cleaning assembly, a first filter screen and a second filter screen can be effectively prevented from being blocked, and the service life of the first filter screen and the second filter screen can be prolonged. By arranging the deodorization assembly, odor can be deodorized, and influence of direct emission of the odor on the environment is avoided.

The invention belongs to the technical field of protective masks, and particularly relates to a new coronavirus protective C-shaped mask. A main body of the protective C-shaped mask is of a three-layer structure and sequentially comprises a polypropylene spun-bonded nonwoven fabric, a double-layer superfine denier electret melt-blown fiber nonwoven fabric and a polypropylene spun-bonded nonwoven fabric from outside to inside; and the C-shaped mask structure is composed of a left mask and a right mask, the edges of the left mask and the right mask are respectively provided with two arc-shaped edges, one of the arc-shaped edges is in abutted to form an arc-shaped middle joint, the edge of the upper portion of the left mask body and the edge of the upper portion of the right mask body are provided with a splayed inclined edge, the portion, close to the inner side of the nose bridge, of the splayed inclined edge is provided with a nose ridge line, and therefore the two wings of the nose bridge can completely cover the nose and the mouth of a wearer when the mask is worn, and no gap is generated between the two wings of the nose bridge. The protective C-shaped mask has an efficient newcoronavirus filtering effect and can reach the NIOSH (National Institute for Occupational Safety and Health in USA) N95 and N99 standards.

The invention discloses a kitchen garbage crushing device. The kitchen garbage crushing device comprises a box. The top wall of the box is provided with a feed cavity with an upward opening. The leftsidewall of the feed cavity is provided with a gripper. A connecting rod extending backwards is rotatably mounted on the front and rear walls of a rotating groove. The connecting rod is fixedly connected with a partition plate in the rotating groove. The partition plate is connected with the bottom wall of the rotating groove through a supporting spring. A filter cavity communicating with the feedcavity is arranged on the lower side of the feed cavity. A crushing cavity with a beveled bottom wall is arranged on the lower side of the filter cavity. The crushing cavity communicates with the filter cavity through a transition cavity. The bottom wall of the crushing cavity is provided with a drainage outlet extending downwards to penetrate through the box, and a filter screen is arranged at the drainage outlet. The left sidewall of the crushing cavity is connected with a discharge cavity penetrating through the box.

The invention discloses concrete mixing plant waste water recycling equipment based on efficient resource utilization, and relates to the technical field of concrete waste water treatment. The equipment aims at the problems that waste water generated by an existing concrete mixing plant is treated through a circulating pool, the circulating pool is large in building stie and low in waste water treatment efficiency, clean water is used for flushing every time the mixing plant is flushed, and consumption of water resources can be increased. According to the following scheme, the equipment comprises a barrel, and the bottom of the barrel is fixedly connected with a double-shaft motor; and an output shaft at the bottom of the double-shaft motor is fixedly connected with a sealing mechanism, the sealing mechanism is sleeved with a guide cover fixedly connected with the barrel, and the bottom of the sealing mechanism is fixedly sleeved with a cam. According to the concrete mixing plant wastewater recycling equipment, multiple procedures of stirring, sealing, water input and filtering can be achieved through one motor, multiple purposes are achieved through one machine, and the practicality of the device is improved; and the whole equipment is high in integration degree, the occupied area of the building site is small, the utilization of the waste water is improved, and the consumption of the water resources is reduced.

The invention discloses a capillary eddy heat exchanger and belongs to the field of ground source heat pump devices. The capillary eddy heat exchanger is characterized by comprising a main case, a cooling-medium circulation line is arranged in the main case, a water inlet and a water outlet are respectively arranged in side walls of two ends of the main case, and the water inlet is located above the water outlet; the cooling-medium circulation line comprises an inlet pipe and an outlet pipe, a plurality of branch pipes with two ends communicated with the inlet pipe and the outlet pipe are arranged in parallel, and the branch pipes are spirally wound the inlet pipe or the outlet pipe from the periphery; the water inflowing direction of the water inlet forms a 0-45-degree included angle with the main case; water-inflowing rotation direction is opposite to the flowing direction of a cooling medium, and water circulation is opposite to circulation flowing direction of the cooling medium, and with over-entering and down-out water flow, more sufficient heat exchange is achieved. Besides, the capillary eddy heat exchanger is provided with a guiding device, a supporting device and a protecting device, hermetic heat exchanging space enclosed by upper and lower separating sealing rubber gaskets and the inner wall of the main case enables the capillary eddy heat exchanger to be more compact in structure, practical, safe and convenient and long in service life.

The invention discloses a dendritic electrostatic spinning/electret composite nanofiber membrane filter material. The material is composed of the following raw materials of, by weight, 75 to 90 parts of polythioetherimide, 7 to 13 parts of silicon monoxide, 10 to 16 parts of powdered activated carbon, 2 to 3 parts of a 3-aminopropyltriethoxysilane coupling agent, 0.8 to 2 parts of glacial acetic acid, a proper amount of deionized water, 4 to 7 parts of metatitanic acid, a proper amount of a 0.6 mol/L AgNO3 solution, a proper amount of N-methyl pyrrolidone, 0.5 to 2 parts of dibutyl phthalate and 1 to 3 parts of tetra-n-propylammonium chloride. Silicon nanowires containing alpha-quartz are prepared, the electrostatic spinning/electret composite fiber filter material is prepared through the electrostatic spinning technique and has the excellent electric charge storage performance, and the filter efficiency of the filter material is greatly improved. In addition, nano-silver is added, nano-titanium dioxide is loaded, the antibacterial endurance property of the filter material is improved, and the long-time high-efficiency filter effect is achieved.

The invention discloses a special deep-bed filter for squeezing of edible oil. The special deep-bed filter is prepared by using natural quartz mine as a raw material and carrying out processing like fragmentation, washing and fine screening and has the advantages of no impurity, crush resistance, wear resistance, high mechanical strength, stable chemical performance, strong pollutant intercepting capability, high benefits, a long service cycle and reusability. The filter is of a multi-edge spherical shape and purely white and has the characteristics of high mechanical strength, strong pollutant intercepting capability, good acid resistance, etc. A cylindrical container is filled with a quartz sand filter material; a lower cone is arrangd below and connected with a barrel so as to facilitate collection of filtered edible oil; a bearing annular plate is arranged at the lower part in the container to restrict space filling by the quartz sand filter material; a filter cartridge is arranged to increase a filtering area and guarantee large filtering flow; a quick-opening bolt is arranged above the barrel and connected with an ellipsoidal head; and an oil inlet pipe and a squeezed oil pipe are arranged on the ellipsoidal head. Edible oil is subjected to pollutant interception and impurity adsorption by the quartz sand filter material, so the effect of high efficiency filtering is achieved.

The invention discloses a gelatin/polyetherimide compound electret fiber filtration material prepared through electrostatic spinning. The gelatin/polyetherimide compound electret fiber filtration material is prepared from, by weight, 65-80 parts of polyetherimide, 10-18 parts of gelatin, 6-11 parts of silicon oxide, 9-16 parts of powdery activated carbon, 1-3 parts of 3-aminopropyl triethoxy silane coupling agent, 0.8-2 parts of glacial acetic acid, a proper amount of ionized water, 3-6 parts of metatitanic acid, 0.6 mol/L AgNO3 solution, a proper amount of N-methylpyrrolidone and 0.8-2 parts of acetic acid. Alpha-quartz-containing silicon nanowires are prepared by adopting the material, the gelatin/polyetherimide compound electret fiber filtration material is prepared through an electrostatic spinning technology and has excellent charge storage stability, and the filtering efficiency of the filtration material is greatly improved. In addition, nano silver is added and nano titanium dioxide is loaded to improve the antimicrobial persistence performance of the filtration material and to achieve a long-term and efficient filtration effect.

The invention discloses an effective and low-resistance mask. The mask comprises a mask body and an elastic band connected with the mask body, wherein the mask body comprises a concave supporting frame, a filtering layer, supporting layers and a sealing ring, wherein the filtering layer and one supporting layer are arranged on the side, where the outer surface of the supporting frame is arranged; the other supporting layer and the sealing ring are arranged on the side, where the inner surface of the supporting frame is arranged; a plurality of small holes are formed in the supporting layers; a first filtering layer in the filtering layer and a first supporting layer in the supporting layers are arranged on the side, where the outer surface of the supporting frame is arranged; the supporting frame, the first supporting layer and the first filtering layer are sequentially attached to one another; a second supporting layer in the supporting layers is arranged on the side, where the outer surface of the first filtering layer is arranged; the second supporting layer is attached to the first filtering layer. By the mask with the structure, the resistance during breathing of a user is reduced while relatively high efficiency of filtration is guaranteed.

The invention relates to the field of wet type polishing machines, in particular to a wet type polishing machine with a water liquid filtering function and a using method of the wet type polishing machine. The wet type polishing machine comprises a base, a first support is fixed to the base, a filtering cylinder is fixed to the upper end of the first support, the upper end of the filtering cylinder communicates with a waste water discharging port of the wet type polishing machine through a liquid feeding pipe, the lower portion of the filtering cylinder is connected with a liquid discharging pipe, a filtering screen plate is arranged in the filtering cylinder, a scraping mechanism used for cleaning the filtering screen plate in real time is arranged on the outer side wall of the filteringcylinder, the scraping mechanism is in transmission connection with the filtering screen plate, a vibrating compaction mechanism is arranged on one side of the exterior of the filtering cylinder, a discharging mechanism used for discharging dust is arranged on the base, and the vibrating compaction mechanism is in transmission connection with the discharging mechanism. According to the wet type polishing machine with the water liquid filtering function and the using method of the wet type polishing machine, the filtering screen plate is cleaned in real time through the scraping mechanism, theefficient filtering effect of the filtering screen plate is kept all the time, the water recycling efficiency is improved, and the working efficiency is improved.

Belonging to the technical field of treatment of contaminated oil, the invention discloses oil extraction filtration equipment and a filtration method. The equipment includes a main tank body, the inside of the main tank body is sequentially provided with an air-water mixer, a conical primary filter, overflow settlers, a floc interceptor, a coalescing separator, a water collecting tank and an oilcollecting tank from the bottom up. The water collecting tank is communicated with a water outlet pipe, the oil collecting tank is communicated with an oil outlet pipe, and an air outlet pipe is disposed above the main tank body. The equipment provided by the invention combines flocculation, air flotation, oxidation, suspension layer filtration, coalescence and filtration into a whole, is equippedwith a floc interception layer, a standby filter and a plurality of overflow settlers, has the characteristics of high treatment efficiency, fast formation of filter layer, strong adaptability, and flexible and stable operation, and is suitable for treatment of various sewage containing suspended matters, is especially suitable for suspension filtration of high salinity and high density oily sewage hardly adaptable by existing similar technologies, also has the advantages of low energy consumption, small land occupation and investment, and low operating cost, thus being suitable for popularization and use.

The invention relates to the field of industrial wastewater purification equipment, in particular to a filtering device for industrial wastewater purification and a using method thereof. The filtering device comprises a base, wherein a filtering mechanism used for filtering flocculate in wastewater is arranged on the base, a sewage disposal mechanism is arranged on the base, is used for sucking and discharging the flocculate filtered on the filtering mechanism, and is in transmission connection with the filtering mechanism, an air pumping mechanism is arranged on the sewage disposal mechanism, and is used for cleaning and dredging the filtering mechanism in an air blowing mode, and the sewage disposal mechanism is in transmission connection with the air pumping mechanism. According to the filtering device for industrial wastewater purification and the use method thereof, the sewage disposal mechanism drives the filtering mechanism to filter wastewater subjected to flocculation treatment, so that efficient filtration of the wastewater is maintained, the wastewater treatment efficiency and effect are improved, shutdown is not needed, continuous work of the whole device is achieved, the wastewater treatment efficiency is improved, and the cleaning difficulty and the labor intensity of the flocculate are reduced.

The invention discloses full-automatic multifunctional multipurpose energy-saving and environment-friendly water purification equipment which comprises a water storage tank and a water cleaning tank,the water storage tank is arranged on one side of the water cleaning tank, a water pump is fixedly connected to the top of the water storage tank, and a purification device is arranged on one side ofthe water pump. According to the invention, water is conveyed to the purification device for filtration and purification; the purified clearwater is introduced into the water cleaning tank to be stored for later use, thereby reducing water purification waiting time, a water body is activated, and refined filtration is performed for multiple times; magnetic impurities are adsorbed at a magnetic box, particle impurities, germs, viruses, different colors, peculiar smells, heavy metals, invisible impurities and harmful substances are removed step by step in a refined mode after passing through a medical stone filter layer, a granular activated carbon filter layer, a compressed activated carbon filter layer, a hollow fiber ultrafiltration layer and a rear activated carbon filter layer, so thatthe taste of water is improved, the release rate of water is controlled during water filtration, impact on the filter element material and the purification filter layer is reduced, the service life ofthe filter element material and the purification filter layer is prolonged, and the filtration and purification effect is improved.

The invention discloses a method of treating highly scaling oil and gas field produced water with microorganisms assisted by modified clay. The method includes the steps that after the highly scaling oil and gas field produced water and modified clay of certain concentration are premixed for certain time in a mixing pond, under the adsorption action of polysaccharides substances and protein on the surface of the modified clay, scale substances such as calcium sulfate and calcium carbonate in the highly scaling produced water are deposited on the surface of the modified clay; the produced water in the mixing pond is guided into a microbial reaction pond, and the sewage is treated through the degradation effect of organic substances in the water; the produced water from the microbial reaction pond is filtered and reinjected to an oil reservoir. The method effectively promotes deposition of scale on the surfaces of modified clay particles, then deposition of the scale on the microorganism surface is reduced, stable operation of the process of treating the highly scaling oil recovery sewage through the microbiological method is ensured, efficient degradation of the oil recovery sewage by the microorganisms is promoted, and technical support and feasible programs are provided to remove highly scaling oil recovery sewage scale and eliminate influence on the efficiency of treating the highly scaling oil recovery sewage through the microbiological method due to deposition on the surfaces of the microorganisms.

The invention discloses a built-in filtering device of an aquarium. The device comprises a box, and the box is sequentially divided into an activated carbon filtering area, an ultrafiltration membrane filtering area and an aeration area by arranging partition boards in the box. The partition boards are provided with openings communicated with adjacent functional areas. An activated carbon filtering layer is arranged in the activated carbon filtering area, a water inlet communicated with the outside is formed in the top of the activated carbon filtering area, an ultrafiltration membrane filtering device is arranged in the ultrafiltration membrane filtering area, an aeration pipe is disposed in the aeration area, and a water outlet communicated with the outside is formed in the right side of the lower portion of the aeration area. The efficient filtering effect can be achieved by arranging the activated carbon filtering layer and the ultrafiltration membrane filtering device, suspended solids can be filtered away, and odor and harmful matter in water can be removed. By means of modular assemblies, later maintenance cost can be reduced, and the maintenance effect is obvious. By arranging the aeration pipe, large-scale aeration work can be conducted, and oxygen dissolved in water can be efficiently increased.

The invention discloses a novel exhaust hood. The novel exhaust hood comprises an exhaust hood body and an oil collecting box, wherein a grease filtering device and an oil fume purification device are arranged in the exhaust hood body, the grease filtering device is fixed above the oil collecting box, the oil fume purification device is fixed at an exhaust port of the exhaust hood body, and the grease filtering device is arranged below the oil fume purification device; a draught fan area is formed at the upper part of the exhaust hood body, and a draught fan is arranged in the draught fan area; an air channel is formed in the middle of the exhaust hood body; a smoke suction hood is arranged at the lower part of the exhaust hood body; a control area is formed on the smoke suction hood; a smoke suction board is arranged in the smoke suction hood and communicated with the air channel; an opening is formed in an exhaust hood case, and filter elements at the opening can slide to the outside of the exhaust hood case through the opening; the filter elements comprise a plurality of long-strip-shaped filter elements and wave-shaped filter elements, and the long-strip-shaped filter elements and the wave-shaped filter elements are arranged at intervals. The novel exhaust hood is simple in structure and has the advantages of high greasy dirt resistance, convenience in cleaning and the like.

The invention relates to a process and equipment for treating a deep waste gas with light ions, the process comprises the following steps: collecting the waste gas, washing with water, performing photolysis, catalyzing, detecting and performing high altitude discharge, the equipment includes a waste gas collecting device, a water washing device, a photocatalytic oxidation device, a detection device and an emission control device; the waste gas collecting device includes a fan and a gas sending tube, the outlet of the water washing device is connected with the inlet of the photocatalytic oxidation device, the outlet of the photocatalytic oxidation device is connected with a discharge pipe, the detecting device is installed at the outlet of the photocatalytic oxidation device, the water washing device comprises an atomization area, a washing area, a dehydration zone and a demisting zone, the atomization area is provided with a plurality of groups of atomization spray nozzles, a three-way control valve is arranged on the discharge pipe, the detection device is a gas indexing detector, the output signal of the detection device is connected with the input end of the emission control device, and the output signal of the emission control device is connected with a three-way control valve power supply control circuit. The process and the equipment have the advantages of good waste gas treatment effect and high emission environmental protection performance, and are suitable for the waste gas treatment of button manufacturing enterprises.

The invention discloses a vinyl polysiloxane-containing electrostatic spinning and electret composite fiber filter material. The material is prepared from 30-45 parts of polyetherimide, 45-55 parts of vinyl polysiloxane, 6-10 parts of silicon monoxide, 8-15 parts of powdered activated carbon, 1-2 parts of 3-aminopropyltriethoxysilane coupling reagent, 0.8-2 parts of glacial acetic acid, a proper amount of deionized water, 2-6 parts of metatitanic acid, a proper amount of 0.6 mol/L of AgNO3 solution, a proper amount of N-methyl pyrrolidone, 0.5-1 part of sodium chloride and 15-30 parts of methylbenzene. Alpha-quartz-containing silicon nanowires are prepared, and the electrostatic spinning and electret composite fiber filter material is prepared by the electrostatic spinning technology; the filter material has the advantages of being small in aperture, high in poriness, low in air friction and the like, has excellent charge storage stability performance, and improves the filter efficiency of the filter material; the antibacterial durability of the filter material is improved and a long-term efficient filtration effect is achieved.