3results about How to "Maintain separation performance" patented technology

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.

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.