8results about How to "Improve anti-pollution performance" patented technology

This invention relates to a method for preparing electronic-grade hydrofluoric acid. The invention utilizes a microchannel reactor for the fluorine oxidation reaction, significantly reducing fluorine consumption and safety hazards during production. Furthermore, the microchannel reactor enhances the gas-liquid two-phase mass transfer during the oxidation reaction, further improving impurity removal and product quality. The addition of multi-effect distillation to the distillation process not only enables secondary heat utilization but also saves on the use of high-temperature heating media at the bottom of the column, effectively reducing energy consumption. In the modified liquid, DMF serves as the solvent, cobalt nitrate provides cobalt ions, and vinylguanidine provides guanidine functional groups and amino groups. Ammonia and propanethiol are used as plasma gases to introduce amino and thiol groups onto the membrane surface. These groups help improve membrane selectivity, effectively separating metal and non-metal ions, as well as acidic impurities in the raw materials.

The application discloses a method for preparing an antibacterial nanofiltration membrane by using amikacin as a water-phase monomer, and belongs to the technical field of composite nanofiltration membrane preparation. The method uses amikacin as a water-phase monomer and adopts an interfacial polymerization method to prepare an antibacterial nanofiltration membrane (polyamide nanofiltration membrane). The method has the advantages of simple operation, mild reaction conditions and relatively low raw material cost. In addition, the prepared polyamide composite nanofiltration membrane has higher selective permeation performance and good antibacterial performance. The nanofiltration membrane flux can be as high as 20 L / (m 2 ·h·bar), and the tetracycline rejection rate can be as high as 99.3%. In addition, the application can also provide a reference for the preparation of other antibacterial interfacial polymerization separation membranes.

The application relates to an antibacterial and antifouling reverse osmosis membrane and a preparation method thereof, and comprises the following steps: (1) uniformly dissolving a multiacyl chloride group organic compound in an organic solvent, then adding cyclodextrin, and carrying out ultrasonic treatment to obtain a cyclodextrin-organic acyl chloride inclusion compound solution; dispersing antibacterial nanoparticles in water, then adding an amino silane coupling agent, and stirring and dispersing to obtain a functionalized antibacterial nanoparticle suspension with amino groups on the surface; (2) uniformly coating the cyclodextrin-organic acyl chloride inclusion compound solution to one surface of a prefabricated reverse osmosis membrane, removing the excess solution on the surface after standing, and then coating the functionalized antibacterial nanoparticle suspension with amino groups on the surface on the surface with the cyclodextrin-organic acyl chloride inclusion compound, removing the excess solution on the surface after standing, and carrying out thermal drying to obtain the antibacterial and antifouling reverse osmosis membrane. The reverse osmosis membrane has excellent stability, small membrane sheet water flux attenuation, obviously improved antifouling capacity, and excellent antibacterial capacity.

The application discloses a gear box circulating cooling structure and cooling method for torque adjustment, relates to the field of gear box application, and comprises a base, the top of the base is provided with an input shaft, an output shaft, an intermediate shaft and a gear set, the outside of the input shaft, the output shaft and the intermediate shaft is provided with an oil injection assembly, the top of a middle cover is provided with an upper cover assembly, and the bottom of the upper cover assembly is provided with an oil sprinkling plate. The application sets two lubricating modes of lubricating oil sprinkling and lubricating oil spraying, can lubricate gears in different rotating speed stages, improves lubricating efficiency, when the gear box is cold started or driven at low speed, the oil sprinkling plate is used for oil sprinkling, when the rotating speed of the gear box increases, the centrifugal force of the oil injection assembly increases, the oil injection assembly is opened, and the lubricating oil is synchronously sprinkled and sprayed, and the sprayed lubricating oil is inclined, so that the lubricating oil can be better sprayed to the gear end face.

The application belongs to the field of membrane separation materials, and discloses a visible light catalytic self-cleaning oil-water separation membrane and a preparation method and application thereof, and comprises the following steps: 4-cyanopentanoic acid dithiobenzoate is used to prepare an alkyne functionalized RAFT reagent; the alkyne functionalized RAFT reagent is grafted on the polymerization chain of azidation polyether sulfone through a click chemistry reaction to obtain a RAFT reagent functionalized polyether sulfone polymer; based on the RAFT reagent functionalized polyether sulfone polymer, a PES / PES-CPPA membrane is prepared through a non-solvent induced phase separation method; a hydrophilic zwitterion PSBMA is modified on the surface of the PES / PES-CPPA membrane through a RAFT polymerization method to obtain a super-hydrophilic / underwater super-oleophobic membrane; Fe 3+ The super-hydrophilic / underwater super-oleophobic membrane is subjected to complex treatment to obtain the visible light catalytic self-cleaning oil-water separation membrane; and the application significantly improves the stability and effect of the membrane material in long-term use.

This invention belongs to the field of solenoid valve technology, specifically providing a two-position multi-way control valve. The two-position multi-way control valve includes a valve body and a valve core. The valve body includes a valve seat and a valve shell distributed along its axial direction. The valve seat includes a connecting seat, multiple connecting rings, and multiple connecting pipes with inlets and outlets. One end of the connecting seat is fixedly connected to the valve shell, and the other end is fixedly connected to a connecting ring. The multiple connecting rings and multiple connecting pipes are alternately distributed along the axial direction of the valve seat, and adjacent rings are fixedly connected. The connecting ring includes an inner convex ring located inside the connecting pipe. The valve core includes a moving iron core located within the valve shell and a valve stem located at least partially within the valve seat. The valve stem includes multiple outer convex rings, each corresponding to at least one inner convex ring. A sealing structure is provided on the outer convex rings so that during the movement of the valve core, the outer convex rings selectively seal against the corresponding inner convex ring through the sealing structure, thereby changing the communication state of the inlet and outlet.

This utility model relates to a contamination prevention kit for a pulp refiner, including an annular receiving plate for connecting to the rear end of the grinding chamber and an annular sealing seat for connecting to the front end of the bushing. The inner circumferential surface of the annular receiving plate is in contact with the outer circumferential surface of the annular sealing seat and can generate relative linear movement. The key technical point is that a retractable corrosion-resistant rubber sleeve is connected between the front end of the outer circumferential surface of the annular sealing seat and the front end of the outer circumferential surface of the annular receiving plate. Compared with the prior art, this utility model prevents the ground pulp from entering between the outer circumferential surface of the sealing seat and the inner circumferential surface of the receiving plate, avoiding contamination of their contact surfaces, thereby ensuring smooth operation of the pulp refiner and significantly improving the operational stability of the pulp refiner.

The utility model discloses a novel high -purity pressure gauge relates to pressure gauge design field, including the shell, the assembly and the protection unit of assembly and protection, its characterized in that, the lower side of shell is equipped with round hole, the shell is provided with axial connector, the axial connector is connected with outer connecting rod on, the shell upside is provided with the protection unit, and the assembly and the protection unit contain organic core fixed plate, C type pipe, sealing piece, movement, dial, zero setting watch needle and steel ball, one organic core fixed plate is arranged in the shell, the dial is connected with the dial through dial screw in the shell, the dial and organic core fixed plate directly are provided with a C type pipe, the C type pipe is welded with sealing piece on, and the corrosion resistance is stronger, and the precision improves, and the movement can be protected, and the pollution resistance improves, and the sealing property is high, does not influence the device performance.