33results about How to "Improve filtration stability" patented technology

The invention discloses a non-woven fabric surface heavy nitrogen coupling gelatin adsorbing material and a preparation method thereof. The method comprises the following steps of: grafting an unsaturated monomer with carboxy to the surface of a macromolecule non-woven fabric base material by using an ultraviolet induction technique so as to introduce the carboxy; furthermore introducing aromatic amine through catalytic condensation of aroma diamine and carboxy; subsequently, converting the aromatic amine into diazo salt; coupling and immobilizing the gelatin on the surface of the non-woven fabric through diazo coupling reaction; and finally, soaking in hot water and eliminating the uncoupled gelatin so as to prepare the non-woven fabric surface diazo coupling gelatin absorbing material. The absorbing material is good in hydrophilicity, namely, the water absorption rate is greater than 292.3%; the solid load and the absorption rate of the gelatin can be adjusted in a large range, the absorbing material has high absorption capability for tannin; and when the tannin concentration is 200-400mg/L, the balance absorption capacity is within 16.8-53.2mg/g, and the absorption balance can be achieved within 3 hours.

The invention belongs to the technical field of glutamic acid fermentation, and discloses a glutamic acid fermentation method and a monosodium glutamate production method. Corn steep liquor is concentrated and is subjected to enzymolysis at proper temperature, pH value and time; and activated carbon is added for adsorption decoloration, and a decolorizing liquid is used for glutamic acid fermentation to provide a nitrogen source and inorganic phosphorus so as to replace the nitrogen source and phosphate in an original culture medium. The baume degree of the concentrated corn steep liquor is 20-25. The hydrolase comprises phytic acid complex enzyme and protease. The corn steep liquor is subjected to enzymolysis, so that the content of available free phosphorus and amino acid is increased, inorganic phosphorus and part of protein hydrolysate in glutamic acid fermentation ingredients are completely replaced, the resource utilization rate is increased, the production cost is reduced, dipotassium phosphate is saved by 9.09 kg/ton in unit glutamic acid, and 1.5 kg/ton defoaming agent is saved. Resin decoloration replaces decoloration of granular activated carbon in the original process,the light transmittance of a neutralization solution can be improved to 93%-98%, and 75% of washing sewage can be reduced compared with the original process.

The invention provides a biological enzyme that catalyzes the synthesis of glutathione and its preparation and extraction method. The biological enzyme is the amino acid sequence shown in SEQ ID NO: 2; the biological enzyme is derived from a genetically engineered strain constructed by in vitro recombination The nucleotide sequence is shown in SEQ ID NO: 1; the preparation method of the biological enzyme that catalyzes glutathione synthesis comprises the steps of: constructing a genetically engineered strain of glutathione biosynthetic enzyme, The nucleotide sequence is recombined into the expression vector by enzyme cutting, and then transferred into the host cell. The enzyme obtained by the invention has high catalytic efficiency, low production cost, environmental protection, high economic value and market competitiveness.

The invention provides a water-saving device for secondary utilization of water resources and a use method of the water-saving device, and provides the following scheme aiming at the problems that an existing water-saving device for secondary utilization of the water resources is inconvenient for rapid and stable filtration, automatic detection of water quality, automatic and intelligent dosing and rapid mixing treatment. The water-saving device for secondary utilization of water resources comprises a treatment box and a filter box, the filter box is fixedly mounted at the top of the treatment box, the same automatic dosing treatment mechanism is arranged on the filter box and the treatment box, and a centrifugal quick filtration mechanism and a vibration coarse filtration mechanism matched with the centrifugal quick filtration mechanism are arranged on the filter box. The device is convenient for automatically detecting the water quality and automatically and intelligently adding a treatment agent, is convenient for automatically and intelligently controlling, treating and discharging, is convenient for realizing vibration rough filtration, centrifugal rotation fine filtration dehydration and stirring mixing through single driving, and improves the filtration treatment efficiency, the filtration stability and the water-agent mixing uniformity. The purposes of rapid and stable filtration and rapid mixing treatment and recovery are achieved, and automation is high.

The invention discloses a long-time reusable mask and a preparation method thereof. The long-time reusable mask comprises a mask body and hanging belts arranged on the two sides of the mask body, andthe mask body comprises a pure cotton cloth surface layer, an isolation non-woven fabric layer, a nano bionic fiber membrane layer, an isolation non-woven fabric layer and a pure cotton cloth skin layer which are sequentially arranged from outside to inside. The long-time reusable mask can be stored for a long time, repeatedly disinfected and used, and effectively obstructs bacteria and viruses.

The invention relates to the related technical field of petroleum, and discloses a petrochemical industry oil-water efficient separation device which comprises a separation tank body, a filter screen piece is installed in the separation tank body, an installation ring is installed in the separation tank body in a sliding mode, a sealing pressure plate is rotatably installed in the installation ring, and communication valves are arranged on the sealing pressure plate in an array mode. Stirring and rotating pieces are installed on the lower side of the sealing pressure applying plate in an array mode, a conical separating and filtering device is installed in the separating tank body, the conical separating and filtering device comprises a fixing ring groove, and a conical body is rotatably installed in the fixing ring groove; according to the high-efficiency oil-water separation device for the petrochemical industry, through setting of a high-efficiency separation function, oily wastewater is introduced into the separation tank body, the rotating motor is kept in a starting state, the rotating shaft and the transmission shaft are driven to rotate, and large-particle impurities in oil water are filtered out through the filter screen in the oil-containing wastewater introduction process.

The invention discloses an efficient dehydration device for coal bed gas ground gathering and transportation and a using method thereof.The efficient dehydration device comprises a filtering dehydration box with the top open and a first dehydration box with the top open, and the top of the filtering dehydration box is fixedly connected with a first cover plate; the top of the first dewatering box is fixedly connected with a second cover plate. The coal bed gas dehydration device can effectively perform dehydration operation on coal bed gas in a mode of matching heating dehydration with cooling dehydration, achieves the purpose of efficient dehydration, can improve liquefaction stability and reduce the phenomenon that adhesion dehydration cannot be continued due to the fact that more water drops adhere to the coal bed gas in a mode of automatically shaking water drops in the dehydration process, and improves the dehydration efficiency of the coal bed gas. According to the coal bed gas dewatering device, impurities in coal bed gas can be conveniently filtered before dewatering, the filter screen can be automatically knocked and vibrated during filtering, and the risk that the filter screen is blocked by static accumulation of the impurities due to static filtering is reduced.

The invention provides a method for preparing fermented tea, fermented tea prepared by using the method, and application of the fermented tea. The method comprises the following steps: (1) providing primary seeds of rasamsonia emersonii, wherein the primary seeds are a strain, which is not cultured by any tea culture medium, of the rasamsonia emersonii; (2) inoculating the primary seeds of the rasamsonia emersonii in a sterilized tea culture medium for culturing under the sterile conditions so as to provide secondary seeds of the rasamsonia emersonii; (3) enabling the secondary seeds of the rasamsonia emersonii to grow and be fermented under the sterile conditions for 15-25 days at 40-54 DEG C in a fermentation tea culture medium having a water content of 41-72wt% based on the dry weight of tea leaves so as to obtain the fermented tea. According to the method provided by the invention, fermentation is more stable and safer, and is short in fermentation cycle and full in material conversion.

The invention discloses a multifunctional filtering bag, which comprises a connecting base, wherein a first filter bag main body is arranged on the top of the connecting base; fixing rods arranged around the first filter bag main body at equal intervals are arranged at the outer side of the first filter bag main body; one end of the fixing rod is fixed with the connecting base; the other end of the fixing rod is fixed with a top cover positioned above the top of the first filter bag main body; a first cage frame is arranged at the inner side of the first filter bag main body; a third filter bag main body and a second filter bag main body are arranged at the inner side of the first cage frame. Through the matched use of the installed structures of the first filter bag main body, the third filter bag main body and the second filter bag main body; the filtering area and the thickness are greatly increased; the filtering quality is further improved; through the installed fixing rods, the connecting base and the top cover, the filtering stability is greatly enhanced; the falling of each component during the filtering can be avoided; the use is flexible.

A method for membrane filtration purification of suspended water, comprising filtering the suspended water under an external pressure through a porous hollow fiber membrane comprising a polyolefin, a copolymer of olefin and halogenated olefin, halogenated polyolefin or a mixture thereof and having an open area ratio in an outer surface of not less than 20% and a pore diameter in a minimum pore diameter layer of not smaller than 0.03 μm and not larger than 1 μm.

The invention discloses a dust removal device and method for oil and gas containing dust. The dust removal device comprises a multi-stage cyclone separation system and a filter type catalytic separation system. An air inlet of the multi-stage cyclone separation system is used for introducing the oil and gas containing the dust, and an air outlet of the multi-stage cyclone separation system is in communication with an air inlet of the filter type catalytic separation system. An air outlet of the filter type catalytic separation system is used for outputting clean oil and gas after dust removal.A filter material of the filter type catalytic separation system is an inorganic membrane filtration material. The multi-stage cyclone separation system comprises a plurality of cyclone separators which communicate in sequence. One or more stages of catalytic sieve plates is or are arranged in a cylinder body of each of the cyclone separators in the tangential direction of cyclone flow. The catalytic sieve plates are of porous plate structures, and the surfaces of the catalytic sieve plates are loaded with catalysts. The dust removal device and method can realize the fractional separation coupling synchronous catalysis of high-temperature and high-dust oil and gas, and can realize the conversion of oil and gas macromolecular volatiles to small molecules while removing particulate dust.