4results about How to "Realize energy cascade utilization" patented technology

The invention discloses a trichlorosilane deep rectification composite impurity removal process, and belongs to the technical field of polycrystalline silicon production raw material purification. According to the process, deep purification of crude trichlorosilane is achieved through the steps of pre-protection and primary adsorption, directional rectification enrichment of methyl dichlorosilane narrow fractions, concentration, mixing with silicon tetrachloride, catalytic reaction rectification conversion, differential pressure thermal coupling rectification purification, double-tank parallel deep purification, tail gas treatment and the like. According to the method, the impurity methyl dichlorosilane difficult to remove is precisely separated through side extraction, the impurity methyl dichlorosilane is converted into a component easy to separate through a catalytic reaction, and the boron and phosphorus impurities are deeply removed in combination with differential pressure thermal coupling energy saving and double-tank alternate adsorption. The process can efficiently remove moisture, metals and key impurities boron and phosphorus, obviously improves the purity of the trichlorosilane product, realizes gradient utilization of energy and hydrogen circulation, and has the advantages of high purity, low energy consumption and continuous production.

This utility model discloses a device for recovering and utilizing waste heat from the overhead steam of a low-temperature methanol washing and regeneration tower, belonging to the field of energy-saving technology. The device includes a primary heat exchanger, a secondary heat exchanger, a primary flash tank, and a secondary flash tank, wherein the primary flash tank is installed on the primary heat exchanger, and the secondary flash tank is installed on the secondary heat exchanger. This utility model replaces the traditional steam heating method with heat pump distillation, utilizing the latent heat of the overhead steam and the compressor's electrical energy to power the low-temperature methanol tower, thus achieving a change in heating method, significantly reducing steam and cooling water consumption, and achieving the goal of energy saving and efficiency improvement.

The invention provides a multi-energy complementary operation method for a micro-grid containing solid electric heat storage and hydrogen energy storage combined heat and power. The method comprises the following steps: firstly, constructing a micro-grid multi-energy coupling system containing solid electric heat storage and hydrogen energy storage combined heat and power; secondly, a solid heat accumulator thermal stress loss and carbon transaction mechanism is introduced, a multi-time-scale collaborative optimization model comprising a day-ahead economic dispatching layer and an intra-day real-time correction layer is constructed, a cascade thermal power balance constraint based on a temperature alignment principle is established, and a temperature alignment judgment coefficient is introduced to prevent heat countercurrent; and finally, solving the collaborative optimization model by adopting an improved whale algorithm which introduces a dynamic lens imaging reverse learning and Cauchy variation dual disturbance mechanism to obtain an optimal power distribution strategy and an operation state of each unit of the system. Based on the solid electric heat storage and hydrogen energy combined heat and power cooperative technology, deep coupling and gradient utilization of electricity-heat-hydrogen multi-energy flow are achieved, the operation economical efficiency of the system is improved, and the adaptability of the system to wind and light fluctuation is enhanced.

This application belongs to the field of waste lithium-ion battery recycling technology, specifically relating to a method for treating waste ternary lithium battery black powder based on pre-fixed fluoride treatment, including the following steps: S1, obtaining waste ternary lithium battery black powder and a fluoride-fixing agent as raw materials, wherein the fluoride-fixing agent consists of quicklime, sodium carbonate, and fly ash; adding the raw materials to water for stirring, a first reaction, and filtration to obtain a first solid residue; S2, calcining and cooling the first solid residue to obtain a second solid residue; S3, adding the second solid residue to water and introducing carbon dioxide for a second reaction, and filtration to obtain a lithium-containing solution and a fluorine-containing solid. This application achieves dual fluorine locking and efficient lithium recovery through the synergistic fluoride fixation of quicklime-sodium carbonate-fly ash and low-temperature calcination.