6results about How to "Maintain separation performance" patented technology

The invention discloses an oil smoke separation device which comprises a supporting frame and at least two blocking pieces installed in the supporting frame, the blocking pieces are arranged in parallel at intervals and distributed in the first direction, the first direction is perpendicular to the gravity direction, the extending direction of each blocking piece is the same as the gravity direction, and a circulation channel is formed between every two adjacent blocking pieces. The projections of the two adjacent blocking pieces on the two sides of the circulation channel in the gravity direction are not overlapped or only partially overlapped, and the distance of the circulation channel in the gravity direction is larger than the distance of the circulation channel in the horizontal direction. The smoke exhaust performance and the oil-smoke separation performance are both guaranteed, the smoke exhaust performance and the oil-fat separation performance are better, smoke exhaust with larger air volume is achieved, the application range is wide, adaptability is high, and in addition, oil is not prone to remaining, and cleaning is easy.

The invention discloses a bacteriostatic reverse osmosis membrane as well as a preparation method and application thereof. The bacteriostatic reverse osmosis membrane disclosed by the invention comprises a non-woven fabric base layer, a porous support layer and a separation layer. The surface of the nascent state polyamide membrane is grafted and modified by tazobactam acid, so that the prepared reverse osmosis membrane has excellent antibacterial performance while keeping the original separation performance.

The invention discloses a dust collector, which relates to the field of dust collectors, comprises a main body structure, and is characterized in that a primary separation structure, a secondary separation structure and a dust collection cup which are coaxial and detachable are arranged on the main body structure, the dust collection cup sleeves the outer side of the primary separation structure, and a cyclone separation cavity is formed between the dust collection cup and the primary separation structure; the secondary separation structure is provided with an air inlet channel, an inlet of the air inlet channel is detachably connected with an air inlet pipe, the air inlet structure is provided with an air inlet channel communicated with the air inlet channel, and an outlet of the air inlet channel is tangent to the cyclone separation cavity, so that dirty air enters the air inlet channel through the air inlet pipe and is tangentially discharged into the cyclone separation cavity through the air inlet pipe; the cyclone dust collector is compact in structure, uniform in airflow distribution, capable of avoiding bias flow, beneficial to quickly forming a stable cyclone flow field, improving dust separation efficiency, shortening an air inlet path, reducing airflow turning times and reducing wind resistance and energy loss, and the overall structure is convenient to disassemble, assemble, clean and maintain.

The present invention discloses a solid-liquid cyclone separator with a spiral groove drag reduction structure, which is provided with a cylindrical section, a conical section, an underflow pipe, an overflow pipe and a feed pipe, and is characterized in that: the inner wall surface of the cylinder of the cylindrical section is provided with a spiral bionic groove structure, the spiral groove is in a continuous placement mode and has a sawtooth shape, the continuous placement mode is composed of two sawtooth grooves, and the size of the sawtooth groove is determined by a dimensionless parameter h + and + Compared with the traditional cyclone separator, the present invention can reduce the surface resistance of the inner wall of the cylindrical section to the maximum extent, maximize the energy utilization rate, and obtain a better cyclone separation effect.

This invention relates to a membrane material, specifically a polyamide nanofiltration membrane material. The invention employs a high-roughness ultrafiltration membrane, resulting in more adsorption sites on the membrane surface. Combined with alcohol-water treatment, the adsorption capacity of the membrane tip for titanium dioxide precursor alcohol solution is enhanced. The vertical placement of the support and a suitable settling time prevent the formation of continuous sheets of titanium dioxide precursor alcohol solution on the support surface, thus preventing hydrolysis to form dispersed titanium dioxide. This maintains the hydrophilicity of the support within a suitable range, thereby ensuring the separation performance of the polyamide membrane layer.

This invention discloses a method for preparing a highly antifouling polyvinylidene fluoride (PVDF) membrane, belonging to the field of membrane separation technology. First, a PVDF membrane is prepared. Then, a PDA coating is constructed on the surface of the PVDF membrane, and LDH nanomaterials are loaded onto it to obtain a ZnAl-LDHs / PDA@PVDF highly antifouling composite membrane. This invention addresses the problems of strong hydrophobicity and susceptibility to organic and biological fouling of traditional PVDF membranes. By introducing a PDA coating to hydrophilize the membrane surface, it solves the problems of low water flux and susceptibility to fouling in PVDF membranes. Further loading LDH nanomaterials onto the PDA-modified membrane utilizes the high specific surface area and hydrophilic properties of LDHs to overcome the difficulty of achieving long-term stable improvement in antifouling performance through single modification methods. This invention constructs a composite modification structure with synergistic effects of PDA and LDHs, enabling the modified materials to stably adhere to the PVDF membrane surface, significantly improving its antifouling performance and reusability while maintaining membrane separation performance.