30results about How to "Low filtration accuracy" patented technology

The invention provides an extraction method of lincomycin. The extraction method mainly comprises the following steps: adjusting acidity of fermentation liquor, filtering by using a ceramic ultrafiltration membrane, then adjusting alkalinity, then filtering by using a ceramic ultrafiltration membrane again, then carrying out primary sec-octyl alcohol extraction and hydrochloric acid back-extraction, adjusting alkalinity of the primary back extraction liquor and then filtering by using a ceramic ultrafiltration membrane again; carrying out secondary sec-octyl alcohol extraction and hydrochloric acid back-extraction and adding acetone to the secondary back extraction liquor to carry out evaporative crystallization. According to the extraction method provided by the invention, the yield of the lincomycin is high, the color grade of the lincomycin can be improved, and the B component content in the lincomycin is reduced. According to the extraction method of the lincomycin, the feed liquid quality of other extraction technologies can be improved by a membrane treatment process, the integral extraction efficiency is further improved, the residual volume of sec-octyl in raffinate in the extraction procedure is reduced, the product quality is improved, and meanwhile, the COD (Chemical Oxygen Demand) in produced wastewater is reduced. The extraction method has certain economic benefit and environmental benefit.

The invention relates to a garden water circulation using system. The garden water circulation using system comprises a water collecting tank and multiple water discharging channels, and further comprises a sub-collecting tank. The sub-collecting tank comprises a tank body buried in the underground. The tank body is internally provided with a separating plate. The upper part of the tank body is provided with an opening, and the edge of the opening is provided with a cover plate. The middle of the cover plate is provided with a through hole. The middle of the separating plate is provided with awater inlet hole. A connecting rod is installed in a filtering area. The upper end of the connecting rod is provided with a sealing plate, and the lower end of the connecting rod is provided with a reverse cone-shaped stopper. The lower end of the connecting rod is sheathed with an annular floating cylinder. A filter screen is further installed in the filtering area. The upper end of the filter screen is fixedly connected with the surface of the circumferential side of the floating cylinder, and the lower end is fixedly connected with separating plate. A height of the upper surface of the cover plate is aligned to the bottom of the water discharging channels in a covering state. While the side surface of the reverse cone-shaped stopper contacts with the inner wall of the water inlet hole,the sealing plate is positioned in the through hole and a gap exists between the sealing plate and the through hole. Safety is good, water circulation utilization is more convenient through distributed water storage, a pressure of the water discharging channels is reduced, so a volume of the water discharging channels can be reduced, and overflowing probability of the water discharging channels is reduced.

The invention relates to the field of Fischer-Tropsch synthesis wax filtration, and discloses a solid-liquid separation method for Fischer-Tropsch synthetic wax. The method comprises the steps of: (1)feeding raw material wax obtained by Fischer-Tropsch synthesis into a filter, and carrying out solid-liquid separation to obtain qualified wax with an iron content of not more than 10ppm; and (2) when the pressure difference between the inlet pressure and the outlet pressure of the filter reaches 0.6MPa or above, stopping feeding of the raw material wax, and conducting slag removal on the filter.The slag removal process comprises the steps of (2-1) emptying the raw material wax in the filter; (2-2) introducing inert gas into the emptied filter for back flushing; and (2-3) introducing the qualified wax into the filter for washing. The steps (1) and (2) are repeated, and the content of iron in the raw material wax is 10-1000ppm. The method is low in operation cost and good in filtering effect.

The invention provides an ultraviolet embossing manufacturing method for a cancer cell detection chip of a micro-through-hole array, which belongs to the field of micro-nano processing. The method adopts the technology of ultraviolet imprinting to manufacture a micro-through-hole array on a polymer film material. The idea of ​​this method is to plate a metal masking layer on the protruding part of the transparent stamp as a light-shielding film, and to block the light during UV imprinting so that it cannot be cured, while the rest of the mold is cured into a hole wall structure, and the residual glue is cleaned after demolding The obtained through-hole film layer is the detection chip. The chip can filter out normal cells and block the larger cancer cells, and then further use the existing mature pathological analysis methods to identify cancer cells and their types. The method can manufacture cancer cell detection chips in batches and at low cost, and provides an effective means for early cancer detection.

The invention discloses a preparation method of a porous film. The preparation method comprises the following steps: (1) acquiring a porous support body; (2) preparing a thick size containing raw material powder, a binder, a dispersant and a pore forming agent; (3) loading the size onto the porous support body, and drying to make a film billet; (4) sintering the film billet to make a porous film precursor; (5) removing the pore forming agent from the precursor to obtain a porous film with the thickness of 5-3,000 [mu]m, the average aperture of 0.05-100 [mu]m and the porosity of 40-90%. The preparation method has the following advantages: firstly, no chemical reaction occurs between the pore forming agent and the raw material powder, so that the ingredients of the porous film cannot be damaged; secondly, the pore forming agent is excellent in thermal stability and always occupies a certain space (place) in the sintering process; after sintering, the pore forming agent is removed, holes or pores are generated in situ; therefore, the whole technological process is simple, the hole structure of the porous film is easy to control, and the porosity is remarkably improved.

The invention discloses a wound filter element and application thereof. The wound filter element comprises a porous aggregate and a rough yarn wound on the porous aggregate, wherein the rough yarn contains polyphenylene sulfide fibre, has a coefficient of twist of 180-280, has excellent bulkiness and better filtering property, and can not be excessively drafted during the winding. The wound filter element disclosed by the invention has the characteristics of small pressure loss, high filtering accuracy, and excellent steaming resistance and chemical properties, and can be applied to the field of filtration of various kinds of high-temperature liquids.

The invention relates to a filter device, in particular for fluids such as hydraulic oil, lubricating media, processing, surface or sea water, having at least one filter element (3) that has at least one effective filter surface (23), which is suitable for removing contaminants from a media flow crossing the filter surface, wherein an effective filter surface is designed as a flexible filter sock (23) that can be pulled onto a support body (13) of the filter element (3). The invention is characterized in that the filter sock (23), while enlarging the effective filter surface thereof, is designed to be longer in the axial direction of the filter element (3) such that the effective filter surface lies in folds upon pulling the filter sock (23) over the support body (13).

The invention relates to a garden water recycling system, which includes a collection tank and a plurality of drainage ditches; it also includes a sub-collection tank; the sub-collection tank includes a tank body buried in the ground, and a partition is arranged in the tank body; the upper part of the tank body is open, and the edge of the opening is provided with a Cover plate; the middle part of the cover plate is provided with a through hole; the middle part of the partition is provided with a water inlet hole; An annular buoy; a filter screen is also provided in the filter area; the upper end of the filter screen is fixedly connected to the peripheral surface of the buoy, and the lower end is fixedly connected to the partition; the height of the upper surface of the cover plate is flush with the bottom of the drainage ditch when it is closed; When the side surface of the tapered plug is attached to the inner wall of the water inlet hole, the sealing plate is located in the through hole and there is a gap with the through hole; the safety is good, and the distributed water storage makes water recycling more convenient, reduces the pressure of the drainage ditch, and makes the drainage ditch Volume can be reduced while reducing the chance of gutter overflow.

The invention discloses an oil gas purification device used in a deep-sea confined space, which comprises a condensation nucleation generating device, an oil and gas suction device, an oil gas condensing device, a centrifugal separation device, an oil collection tank and a filtering and purification device. The condensation nucleation generating device includes a first Water pipe, first heater, atomizer, air compressor and dryer; oil and gas suction device includes oil and gas inlet pipe, second heater and fan; oil and gas condensing device includes second water inlet pipe, shell and tube condenser and outlet water pipe; the oil collection tank is arranged under the housing; the centrifugal separation device includes a driving motor and a centrifugal impeller; the inlet of the filtering and purifying device is connected to the outlet on the side wall of the housing, and the outlets of the filtering and purifying device are respectively connected to Air pipe and air compressor inlet. The invention can improve the oil and gas purification efficiency, better improve the air quality in the deep-sea confined space, save energy, reduce noise, increase the service life of the system, and reduce the use cost of the system.

The invention discloses a porous film which comprises a filtering layer and a porous support, wherein the filtering layer is composed of dendritic metal substance powder and / or metal substance oxide powder. A preparation method for the porous film comprises the following steps: 1) acquiring the raw material powder and the porous support, wherein the raw material powder is the dendritic metal substance powder and / or the metal substance oxide powder; 2) preparing slurry; 3) loading the slurry on the surface of the porous support, drying and preparing into a film blank; 4) sintering the film blank and cooling, thereby acquiring the porous film. Firstly, the dendritic metal substance powder is stacked and formed into the pores of the porous film, the complex hole-forming process is avoided and the porosity is high and is easy to control; the filtering layer composed of the dendritic metal substance powder and / or the metal substance oxide powder is stable in physico-chemical property, long in service life and free from mutual reaction; the complex phase-forming process is avoided; the component of the porous film is easy to control.