2results about How to "Reduce discharge pressure" patented technology

This utility model discloses a system for the treatment and recycling of domestic sewage in courtyards, relating to the field of environmental protection technology. It includes a three-compartment septic tank, a leachate tank, a multi-stage composite packing infiltration system, a water storage tank, a water distribution tank, and a rhizosphere water distribution system, connected in sequence. The multi-stage composite packing infiltration system comprises multiple layers of composite packing material and a surface planting layer. Each composite packing layer is composed of multiple modular structures. Each modular structure includes a box, with handle holes on its side walls. The distance between the handle hole and the top of the box is less than the thickness of the boss. Adjacent boxes on the same layer are fixedly connected by plugs. The thickness of the plugs is greater than the thickness of one handle hole but less than the thickness of two handle holes. The leachate tank is located on the ground. The modular structure of this utility model, through the handle hole and plug design, ensures horizontal connection stability. By adding a leachate tank, the discharge pressure of the sewage pump is reduced, ensuring the normal operation of the sewage pump.

This invention provides an aluminum-based nickel-free medium-temperature sealing agent for anodizing, its preparation method, and an aluminum-based anodizing sealing method, belonging to the technical field of sealing agents. By weight, the aluminum-based nickel-free medium-temperature sealing agent provided by this invention comprises the following components: 60-120 parts of lithium salt sealing agent, 2-10 parts of zirconium salt film-forming accelerator, 3-20 parts of titanium salt film-forming accelerator, 10-40 parts of small molecule organic carboxylate, 0.5-5 parts of nonionic surfactant, and 800-1200 parts of water. Using the aluminum-based nickel-free medium-temperature sealing agent provided by this invention, the appearance retention effect of the workpiece can be improved while meeting the nickel-free environmental protection requirements.