5 results about "Micropore filtration" patented technology

This invention provides an air supply and dust removal device for high-temperature corrosion prevention and control in coal-fired power plant boilers, comprising a cyclone separator and a microporous filter. The cyclone separator includes a separation shell, an air inlet, an exhaust outlet, and a first ash discharge outlet. The separation shell has a cylindrical separation chamber, and the air inlet, exhaust outlet, and first ash discharge outlet are respectively connected to the separation chamber. The air inlet is located at the upper part of the separation shell and is tangent to the outer wall of the separation shell. The exhaust outlet is located at the top of the separation shell, and the first ash discharge outlet is located at the bottom of the separation shell. The microporous filter includes a filter shell and a microporous filter element. The filter shell has an air inlet and an exhaust outlet, with the air inlet connected to the exhaust outlet. The microporous filter element is disposed inside the filter shell. The cyclone separator performs primary dust removal of large particles in the secondary air, and the microporous filter performs secondary dust removal of small particles in the secondary air, thereby achieving the removal of both large and small particles of dust in the secondary air.

This invention relates to the preparation and application of carbon dot-functionalized lanthanide metal-organic framework materials for the detection of permanganate ions in water: S1, selecting raw materials: europium nitrate, trimesic acid, and grapefruit peel; S2, dissolving trimesic acid in anhydrous ethanol and stirring; S3, adding europium nitrate solution to the solution obtained in S2 and stirring; S4, allowing to stand, centrifuging to collect the white precipitate, washing and drying to obtain a white lanthanide metal-organic framework material; S5, drying and crushing grapefruit peel, adding deionized water, and transferring to a high-pressure reactor for reaction; S6, centrifuging the solution obtained in S5, taking the supernatant and filtering it through a microporous membrane; S7, dialysis purification of the solution obtained in S6 to obtain a pale yellow carbon dot solution; S8, mixing the carbon dot solution obtained in S7 with the lanthanide metal-organic framework material in S4 to obtain a carbon dot-functionalized lanthanide metal-organic framework material; S9, using the material obtained in S8 for the detection of permanganate ions in water.

The present application relates to the technical field of microporous filtration membrane, and particularly relates to a production control system of a microporous filtration membrane based on polytetrafluoroethylene, which comprises an acquisition module, an adjustment module, a correction module, an updating module and an early warning module. The present application actively compensates for the unevenness of the base band by adjusting the draw ratio, pre-corrects the calendering deviation before longitudinal extension, further introduces the quality deviation degree to correct the transverse stretching heating power, and reversely optimizes the power correction coefficient and the mixing ratio through the threshold comparison and stability analysis of the adjustment index and the correction index, so as to realize the closed-loop setting of the front-end formula parameters from the performance of the rear section, and trigger the hierarchical early warning based on the double-exponential deviation degree, thereby effectively overcoming the problems that the microporous structure uniformity of the finished filter membrane is poor, the air permeability performance fluctuates greatly and the yield of large-scale production is difficult to guarantee due to the open-loop decoupling of the process parameters and the lack of feedforward adaptive adjustment.

The utility model relates to filter core technical field, and disclose a kind of convenient to replace microporous high-efficiency filter core, including microporous filter core and filter core shell, the left and right two side surfaces of filter core shell are connected with the connecting shell of screw thread, microporous filter core is installed in the inside of filter core shell, microporous filter core includes support frame, connecting frame, limit component and threaded rod, support frame is installed in the bottom of limit component, connecting frame is fixedly connected in the inner wall surface of support frame, threaded rod is fixedly connected in the top end surface of connecting frame.The convenient to replace microporous high-efficiency filter core, by being provided with metal crosspiece, microporous filter core body and locking bolt, locking bolt can lock and fix between metal crosspiece and microporous filter core body, convenient to separate microporous filter core body from filter frame, can protect the safety of microporous filter core body, without spending a lot of time to repair microporous filter core body, the disassembly of microporous filter core body is more convenient.

This invention relates to the field of chemical purification technology, specifically to a method for improving the purity of hydrogen peroxide. The method includes sequentially subjecting an industrial-grade hydrogen peroxide solution to low-temperature pre-filtration, low-metal precipitation activated carbon fiber organic impurity capture, bifunctional confined trapping membrane contact adsorption purification, ceramic nanofiltration, and terminal microporous filtration; the surface of the bifunctional confined trapping membrane is immobilized with N-methyl-D-glucosamine groups and 1-aminoethylidene diphosphonic acid. This method can simultaneously reduce the content of organic impurities, metal ions, borosilicate impurities, and particulate matter in hydrogen peroxide, and reduce the risk of material leaching and hydrogen peroxide decomposition, making it suitable for the preparation of high-purity hydrogen peroxide.