4results about How to "Achieve efficient recycling" patented technology

This invention provides a cultivation substrate, its preparation method, and its application, belonging to the field of tailings utilization technology. The cultivation substrate, by weight, comprises: 1-7 parts of an algae-bacterial symbiosis, 1-12 parts of modified illite tailings, and 1-22 parts of sheep manure; the algae-bacterial symbiosis includes *Chlorella vulgaris* and *Streptomyces flavus*. The cultivation substrate provided by this invention meets the requirements of standard NY / 2118-2012 for vegetable seedling substrates, improving soil physicochemical properties while also promoting plant growth and enhancing plant stress resistance. The cultivation substrate provided by this invention has advantages such as environmental friendliness and sustainable utilization, aligning with the development trend of modern agriculture, and providing a new direction for the resource utilization of illite tailings; it also achieves efficient recycling of mine tailings and agricultural waste, providing an innovative path for green agricultural development and resource utilization.

The utility model provides a circulating water return water waste heat recovery system which is characterized in that a compression type heat pump unit is arranged between a circulating water field and a municipal heat supply network water supply pipeline, heat of waste heat water in circulating water is transferred to return water in the municipal heat supply network water supply pipeline through the compression type heat pump unit, and heat supply network water supply is heated. And the waste heat water after heat recovery returns to the circulating water field. According to the system, the compression heat pump technology is adopted, efficient recycling of circulating water waste heat is achieved, and the waste heat recycling amount meets the regional heating requirement; the running number of fans of the circulating water field can be reduced, the electric quantity is saved, the heat dissipation and evaporation capacity of circulating water is reduced, the real-time water supplementing amount is reduced, and fresh water consumption is reduced; direct emission of waste heat is reduced, and thermal pollution is reduced.

This invention relates to an integrated renewable fuel cell system, comprising: a URFC stack for electrolyzing water to generate hydrogen and oxygen in electrolysis mode and consuming hydrogen and oxygen to generate electricity in fuel cell mode; a gas management module including a hydrogen supply circuit, an oxygen supply circuit, and three purge gas circuits, respectively connected to the URFC stack, for providing hydrogen, oxygen, and purge gas for power generation; a water management module including a low-pressure water tank, a high-pressure water tank, a makeup water tank, and a gas-liquid separator, for providing cooling water, electrolyzed water, and their recycling; a sensing module including a pressure sensor, a flow sensor, and a temperature sensor, for acquiring system operating parameters in real time; and a circuit control module for receiving data from the sensing module and executing the linkage control of power supply and valves according to preset logic. Compared with the prior art, this invention improves the system's operational stability and the utilization rate of reactant gas and electrolyzed water by dynamically adjusting valve opening and closing and system pressure and temperature. This invention's system has advantages such as high automation, long service life, and strong environmental adaptability, and is suitable for multiple fields such as aerospace energy storage, smart grids, and high-efficiency energy conversion.

This invention relates to a method for regenerating waste lithium iron phosphate cathode materials and lithium-ion batteries, belonging to the field of electronic waste resource utilization technology. The method for regenerating waste lithium iron phosphate cathode materials includes the following steps: adding waste lithium iron phosphate cathode materials to a medium-strong acid solution for acid leaching and dissolution, followed by filtration to obtain a transparent solution; reflux heating the transparent solution, followed by filtration to obtain an iron-phosphorus product and a lithium-containing solution; treating the lithium-containing solution to obtain a lithium salt product; mixing the iron-phosphorus product, the lithium salt product, and a carbon source, followed by calcination under an inert atmosphere to obtain a LiFePO4 / C composite material. This invention solves the problems of complex processing, high energy consumption, serious secondary pollution, high impurity content in products, and low quality of recycled products in existing waste lithium iron phosphate battery treatment technologies. Furthermore, the recycled cathode electrode material obtained by this invention can meet battery-grade standards again.