42 results about "Assimilative capacity" patented technology

The invention discloses a sintered metal fiber filtering material comprising at least two sintered metal fiber felt layers, wherein the pore size of each sintered metal fiber felt layer is decreased layer by layer along the fluid inflowing direction. A preparation method of the sintered metal fiber filtering material includes the steps of shearing into short fibers; feeding the short fibers into a feeding device of a clothing felt machine to produce a soft metal fiber felt by utilizing an airflow depositing principle, and then compacting; overlying two to four metal fiber felt layers with different unit felt weights and filtering precisions according to the filtering precision from small to large so as to form a composite metal fiber felt, then placing the composite metal fiber felt into a vacuum sintering furnace for sintering, and cooling after sintering, wherein a sintering isolation material is arranged between the two adjacent composite metal fiber felts; and finally, flattening the metal fiber felts which are sintered into one body and pressing the metal fiber felts to have certain thickness. The obtained sintered metal fiber filtering material with a multi-layer structure has the characteristics of high filtering precision, strong assimilative capacity and high flux.

The invention provides a method for calculating the assimilative capacity of a water functional area in a freeze-up period, and aims at providing a method for calculating the assimilative capacity of the water functional area suitable for the cold region river freeze-up period. The method is characterized by including the steps of establishing a one-dimensional water quality model of the assimilative capacity of the water functional area and the like. The method has significance in analyzing and regulating the water environment risk of the cold region freeze-up period.

The invention discloses a composite nuclear track membrane and a preparation method thereof. The composite nuclear track membrane comprises a polyester nuclear track membrane or a polycarbonate nuclear track membrane, wherein a porous cellulose acetate membrane is composited on one surface of the polyester nuclear track membrane or the polycarbonate nuclear track membrane so as to form the composite nuclear track membrane of which the thickness is 67-160 microns, the aperture of the polyester nuclear track membrane or the polycarbonate nuclear track membrane is 1-10 microns, the pore density of the polyester nuclear track membrane or the polycarbonate nuclear track membrane is 2*10<5>/cm<2>-2*10<7>/cm<2>, and the thickness of the polyester nuclear track membrane or the polycarbonate nuclear track membrane is 7-25 microns. The composite nuclear track membrane has the advantage that the surface hydrophilicity is good, the mechanical strength is high, the membrane thickness is moderate, the automatic operation can be realized easily, the flux of the filtering liquid is high, and the assimilative capacity is strong; the composite membrane is an integer, is not layered and is suitable for fabricating roll type filter cores; the porous cellulose acetate membrane composited on the nuclear track membrane is taken as a pre-filtering layer or a support layer of the nuclear track membrane, so that the problems about mechanical strength and thickness of the membrane are solved, and meanwhile, the a pre-filtering problem of the membrane is solved.

The invention relates to an assimilative capacity calculating method based on binary water circulation. The assimilative capacity calculation method includes steps of 1, determining overproof pollutant types of a watercourse; 2, determining water quality target according to the water function area where the watercourse is; 3, determining upstream coming water flow and quality of the water function area so as to determine boundary conditions of pollutant balance of the watercourse; 4, determining comprehensive degradation coefficient of water quality of the watercourse; 5, determining the design flow of the water function area according to the nature-society binary water circulation flow balance of the watercourse; 6, selecting an assimilative capacity calculation model and calculating assimilative capacity of the water function area according to the water quality target, the upstream coming water flow and quality, the comprehensive degradation coefficient of the water quality and the design flow. The assimilative capacity calculating method can calculate how many pollutants are contained in one river while the water quality of the watercourse can be still kept healthy, and accuracy of calculation results is improved.

The invention discloses a monitoring and alarming device for water quality pollution control. The monitoring and alarming device comprises a ship body; the ship body is provided with a propeller; themiddle of the bottom of the ship body is provided with a water quality detector; one side of the water quality detector is provided with a sensor; the upper part of the ship body is provided with a sewage treatment tank; the top of the sewage treatment tank is provided with an alarm; one side of the alarm is provided with a treater on the sewage treatment tank; and one side of the sewage treatmenttank is provided with a water inlet pipe. The water quality assimilative capacity is compared with a water quality pollutant concentration; when water body pollution is within a water body treatmentcapacity range, the water body pollution is not treated, so that the working efficiency is increased; when the water quality pollutant concentration is higher than the water quality assimilative capacity, sewage is treated, meanwhile, the water quality pollution level is induced and measured by a turbidity sensor and a PH sensor, a water body in a region where the pollution level is high is firstly treated to avoid the diffusion of a pollution source, so that the sewage treatment effect is further improved.

The invention discloses an automatic backwash filter for a ballast water management system. The automatic backwash filter consists of a cleaning motor, a transmission component, a filter component, a lower cylinder component, an upper cylinder component and a differential pressure instrument, wherein the filter component consists of four filter cartridges; filter tips are uniformly distributed on a sewage discharge shaft; the upper end of the sewage discharge shaft is closed, and the lower end of the sewage discharge shaft is provided with an opening; the transmission component consists of a driving wheel train, a limiting mechanism, a fixed plate and four driven wheel trains; threads are formed in a bearing sleeve through hole and are in threaded connection with a screw shaft; a hollow shaft is provided with a key groove and is connected with the screw shaft through a key; threads are formed on the circumferential surface of the screw shaft, and a key groove with a through end is also formed in the circumferential surface of the screw shaft; a water inlet, a drain outlet, a sewage collecting chamber and four sewage discharge bend pipes are arranged on the lower cylinder component. The automatic backwash filter disclosed by the invention has the characteristics of large filtering area, strong assimilative capacity, small pressure loss, small floor area, small amount of backwash water, good installation and maintenance performance and the like, and can greatly meet actual requirements for ship installation.

The invention discloses a filter paper with high filtration efficiency. The filter paper comprises the following raw materials by weight: 50 to 60 parts of hemp pulp, 45 to 50 parts of wood pulp, 20 to 25 parts of a polystyrene fiber, 3 to 5 parts of sodium carboxymethylcellulose, 3 to 4 parts of nanometer carbon dust, 1 to 2 parts of potash feldspar powder, 1 to 2 parts of alum powder, 1 to 2 parts of 4,4'-methyl diphenylene diisocyanate, 2 to 3 parts of diethylenetriamine, 2 to 3 parts of micro polyamide wax powder, 0.8 to 1 part of bis(dioctyloxypyrophosphato)ethylene titanate, 0.4 to 0.6 part of an anti-oxidant DSTP, 0.5 to 0.6 part of water and zinc borate, 2 to 3 parts of glycol, 6 to 7 parts of rosin, 15 to 20 parts of absolute ethyl alcohol, 3 to 4 parts of nanometer alumina, 0.8 to 1 part of polyoxyethylene octyl phenyl ether, 0.3 to 0.4 part of gamma-(2,3-epoxypropanolato)propyl trimethoxy silane and a proper amount of water. The filter paper produced in the invention has high filtration precision, high filtration efficiency, small air resistance and good assimilative capacity and is environment friendly; an impregnation liquid used in the invention overcomes the disadvantages of great brittleness, poor cohesiveness on the surface of fibers in the filter paper and the like of a filter paper adhesive film, exerts the effect of multistage filtration, compensates for the defect of large bore diameters of a part of bores among the fibers in the filter paper, improves uniformity of the bore diameters of bores among the fibers in the filter paper and enhances screening and filtering effects.

The invention discloses a polyamide filter material and a filter element for oil filtration. The filter material is made from a polyamide material and is of a hollow cylindrical structure prepared by mutually gluing and winding superfine fibers ejected by virtue of melt-blowing technical processing; the filter material is of a loose structure which is provided with filter holes different in pore diameters; the pore diameter distribution mode of the filter holes is as follows: the pore diameters are sequentially and gradually decreased from outside to inside along the cylindrical structure. By virtue of controlling the structural parameters of the filter material, filtration of oils such as fuel oil or lubricating oil is realized, the filter material has relatively high filtration precision, assimilative capacity and oil-water separation capability on the premise of ensuring oil resistance and alcohol corrosion resistance; the scheme breaks through the restriction that only hydrophobic materials can be selected as traditional filter materials so as to meet oil-water separation indexes; by virtue of fully using the characteristics such as high corrosion resistance and high reliability of the polyamide material in the oils, the filtration requirements of common oils are met.

The invention relates to filter paper and a preparation method thereof. The filter paper disclosed by the invention is composed of the following raw materials by weight: 90-100 parts of bamboo pulp, 12-15 parts of cellulose acetate, 10-12 parts of mineral wool fibers, 3-4 parts of stearic acid, 2-3 parts of nano silica, 2-3 parts of dolomite powder, 5-6 parts of microwax powder, 1-2 parts of sodium dibutylnaphthalene sulfonate, 1-3 parts of glycerol triacetate, 2-3 parts of oxidized polyethylene wax, 0.8-1 part of dimethyl isooctyl thioglycolate tin, 0.6-1 part of aminopropyl triethoxysilane, 0.1-0.2 part of alumina powder, PAE3-5 parts of a wet strength agent, 6-10 parts of rosin, 15-20 parts of absolute ethyl alcohol, 1-2 parts of lauryl alcohol polyoxyethylene and a proper amount of water. The filter paper produced by the method has high filtration precision, high filtration efficiency, low air resistance, strong assimilative capacity and environmental protection. An impregnation liquid not only overcomes disadvantages of large fragility of filter paper coating, poor cohesive property to fiber surfaces in the filter paper and the like but also plays a multi-filtration effect, thereby making up the defects that partial holes among the filter fibers are relatively large in size, increasing uniformity of the hole size among the filter fibers and enhancing a filtering effect.

The invention discloses polypropylene profiled fiber for dust removing and filtering. The polypropylene profiled fiber is prepared from polypropylene resin, nanometer ceramic powder, nanometer graphene, a silane coupling agent, stearic acid and acetone, the preparation processes of the polypropylene profiled fiber for dust removing and filtering comprise raw material weighing, preparation of modified nanometer ceramic powder, preparation of a mixed material of the stearic acid and the modified nanometer ceramic powder and preparation of the polypropylene profiled fiber. Different profile spinnerets extrude profiled polypropylene fiber yarns out, the section of the fiber is trilobal shape, C-shaped, round and hollow, cruciform, 'mi'-shaped or triangular, the yarns are smooth and round, thesection profile degree of the fiber is 35%-55%, the length of the fiber is 58-100 mm, the fiber fineness is 5.2-13 dtex, the filtering efficiency of the polypropylene profiled fiber is high, the impurity containing and assimilative capacity is high and is 2-3 times that of an ordinary filtering fiber product, the yield strength of the fiber is improved by 3-5 MPa, the elongation at break is improved by 16-25%, and the elasticity modulus is increased by 150-200 MPa.

The invention discloses a filter element structure and a processing method thereof. The filter element structure comprises two cylindrical or conical filter cartridge frameworks which are arranged together in a sleeved mode and are provided with opened upper ends and closed bottom ends, wherein the bottom ends of the cartridge frameworks are planer or protruding spherical surfaces, a nuclear hole film is clamped between the two filter cartridge frameworks and forms a bag-shaped structure close similar to a filter cartridge framework structure, and the upper ends of the two filter cartridge frameworks are connected together. The processing method of the filter element structure comprises the steps that the nuclear hole film is put on the upper end face of the filter cartridge framework having the larger inner diameter, the filter cartridge framework having the smaller inner diameter extends into the lower end of the inner cavity from the upper end of the filter cartridge framework having the larger inner diameter, and meanwhile the nuclear hole film is pressed into the lower ends of the two filter cartridge frameworks. The upper ends of the two filter cartridge frameworks are sealed and welded together. The filter element structure is integral and is convenient to replace and more convenient to use, a processing and assembling process is simple, the manufacturing cost is low, the assimilative capacity is strong, the filtering efficiency is high, and the replacement frequency is reduced.

The invention relates to a stainless steel high-pressure filter. The stainless steel high-pressure filter comprises an upper shell, a lower shell, a lead screw, a first filter element, a second filter element, an upper end cover and a lower end cover, wherein the upper shell and the lower shell are connected through an external thread and an internal thread; a first ventilation opening and a second ventilation opening are formed in two sides of the end part of the upper shell respectively; a partition is used for isolating the first ventilation opening from the second ventilation opening; the interior of the lower shell is provided with a cavity; the lead screw is arranged on the upper shell; the top end of the lead screw is fixed on the inner wall of the upper shell; the upper end cover is arranged in the middle of the lead screw; the tail end of the lead screw is fixed on the lower end cover; and the first filter element and the second filter element are arranged between the upper end cover and the lower end cover. The stainless steel high-pressure filter is simple in structure, compact in design and convenient to use, the upper shell and the lower shell are tightly connected, the high pressure resistance effect is good, the filter is applicable to purification of compressed air in the cavity, air in the cavity is filtered for the two times through the first filter element and the second filter element, the filtering effect is better, and the assimilative capacity is higher.

The invention provides a single-material gradient filter element. The filter element comprises at least two filter layers which have the same density and are formed by hot-melting and winding of polypropylene fiber yarns; and polypropylene fiber yarns of the filter layers from outside to inside have different thicknesses, and polypropylene fiber yarns of the outer layer are thicker than those of the inner layer. According to the single-material gradient filter element, gradient filtration of the filter element can be realized by changing thickness of the polypropylene fiber yarns of different filter layers. According to the gradient filtration realized by the manner, the density of each filter layer is the same, namely the compact degree of each layer is the same, so that the filter element has relative good strength and strong tensile strength, and has a relatively long service life since the filter element cannot be easily extruded and deformed in the filtering process. Furthermore, due to relatively high strength, a frame structure does not need to be added inside the filter element for supporting, so that the filtration flux and assimilative capacity can be ensured, and materials can be saved.

The invention discloses a pre-warning method for assimilative capacity of reservoirs based on a least squares method. The method comprises the following steps: (1) selecting a plurality of water quality monitoring points in a reservoir; (2) monitoring the water quality of high, middle and low water layers of the monitoring points; (3) calculating reservoir water quality parameters; (4) calculatingthe water quality parameters in the next 12 hours by utilizing least squares curve fitting based on historical reservoir water quality parameters; (5) prompting when a pre-warning value in a predicted period of time appears. According to the method provided by the invention, the function fitting is carried out after optimizing the monitoring data, and the reservoir water quality parameters in thenext 12 hours are predicted so as to provide assistant decision for the management staff.

The invention discloses a two-stage multi-channel water filtering device which comprises a channel selection device, a rough filtering unit, a fine filtering unit and a housing, wherein the rough filtering unit and the fine filtering unit are serially arranged in the housing; the channel selection device penetrates the interior of the fine filtering unit and are fixedly connected with the fine filtering unit and the rough filtering unit respectively; the fine filtering unit comprises a plurality of fine filtering plates; the fine filtering plates locally cling to each other and are coaxially and serially arranged; the channel selection device comprises a central barrel and a plunger; the central barrel and the plunger form a plug valve structure; the plunger is a cylindrical valve core in which a plurality of channels are formed; different channels are selected for filtering by rotating the plunger. According to the two-stage multi-channel water filtering device, the filtering precision is improved and the overall volume and the weight of the filtering device are reduced; the working states of the multiple layers of filtering plates of the plug valve structure can be switched, so that the areas of the filtering units are enlarged, the assimilative capacity is increased, and the service life of the filtering device is prolonged; the filtering device is compact in structure and convenient to operate.

The invention discloses an oil product circulating purification device based on a polyamide melt-blown filter element. The oil product circulating purification device comprises an oil storage device, a hydraulic pump and a filter which are connected through pipelines; an oil product needing to be filtered is pumped into the filter from the oil storage device to be filtered by the hydraulic pump through the pipeline and then flows back into the oil storage device; the filter filters the oil product by adopting the polyamide melt-blown filter element, the filter element comprises an upper end cover, a lower end cover and a polyamide filter material, the polyamide filter material is obtained by treating a polyamide material through a melt-blowing technology, and superfine fibers blown out through the technology are mutually bonded and wound to form a hollow barrel-shaped structure; the filter material is of a loose structure, and filter holes of the different hole diameters are formed; the hole diameter size of the filter holes is distributed in the mode that the hole diameter size is sequentially and gradually decreased from the outer layer to the inner layer of the barrel-shaped structure. The oil product circulating purification device has the higher filter precision, assimilative capacity and oil-water separation capacity, has the advantages of resisting oil product corrosion, being high in reliability and the like and meets the filter requirement of the common oil products.

The invention relates to the field of mechanical engineering, in particular to a vacuum pipeline device of an oil filter. The vacuum pipeline device is composed of an electromagnetic valve, an electromagnetic valve seat pipe, an elbow, a corrugated pipe lower flange, a corrugated pipe, a corrugated pipe upper flange, a valve, a straight pipe and a pipe flange. The vacuum pipeline device is characterized in that the electromagnetic valve is positioned at the upper end of the electromagnetic valve seat pipe and connected with the elbow, the corrugated pipe is connected with both the corrugated pipe lower flange and the corrugated pipe upper flange, the corrugated pipe lower flange is connected with the elbow, the corrugated pipe upper flange is connected with the valve, and the upper end of the valve is connected with the straight pipe which is connected with the pipe flange. The vacuum pipeline device has the advantages of long service life, high assimilative capacity, high corrosion resistance, high temperature resistance, large flow and convenience in operation, can well protect oil inside from being oxidized by air, guarantees quality of the oil, is safe and simple and improves production efficiency.

The invention discloses a two-stage integrated composite filter element oil circulation purification device, which comprises an oil tank, a hydraulic pump and a filter connected through a pipeline, and the hydraulic pump transfers the oil to be filtered from the oil tank through the pipeline. The middle suction filter is filtered and then returned to the oil storage device; the filter is filtered by a two-stage integrated composite filter element, the folded filter paper is sleeved on the outer ring of the inner protection tube, and the polyamide filter material is sleeved on the folded filter paper or the outer protection tube. For the outer ring of the tube, the polyamide filter material is made of polyamide material through the melt-blown process. The melt-blown superfine fibers are bonded and entwined to form a polyamide melt-blown non-woven fabric. The polyamide melt The spray non-woven fabric is a loose structure with filter holes arranged on it. The invention has higher filtration precision, dirt holding capacity and oil-water separation capacity, and has the characteristics of oil corrosion resistance, high reliability, etc., and meets the filtering requirements of common oil products.

The invention discloses a multi-stage filtering unit, a water purification filtering head and a wastewater purification system, and relates to the field of wastewater purification treatment. According to the invention, the multi-stage filtering unit comprises a low-density filtering polymer fiber layer, a low-density modified silica gel layer, a porous nanometer material layer, a high-density modified silica gel layer and a high-density filtering polymer fiber layer which are sequentially arranged in a water flow direction so as to effectively remove suspended solids and viscose particles in water to reduce the turbidity of the water; when the multi-stage filtering unit is used for filtering, each stage of filtering material automatically forms a sparse-first and dense-second state along the water flow direction, so that the quality of discharged water can be ensured under various operation conditions; and the water purification filtering head has the advantages of being simple in structure, high in assimilative capacity, long in service life, small in occupied space and the like, can carry a low-pressure lifting pump, ensures the high filtering speed and the high outlet water quality under the low pressure, and achieves repeated recycling of dust removal wastewater.

The invention discloses a biodialysis system which comprises a purification tank, wherein one or multiple water delivery units extend in the purification tank; each water delivery unit is provided with one or multiple water drainage devices which are communicated with the water delivery unit; each drainage device extends towards the top surface of the purification tank; and each water delivery unit is further connected with a water supply unit. According to the invention, pollutants in sewage or sludge can be subjected to physical/chemical/biological purification processes under the action of water, so that the water ecology can be restored, and the basic and important self-purification capacity and assimilative capacity of the water body can be restored and enhanced. Thus, the biodialysis system and the decontamination method have the advantages of energy saving, emission reduction, low carbon, sustainability and environment friendliness.