9 results about "Total recovery" patented technology

The application discloses a method for improving recovery rate of extremely fine-grained gold ore by multi-process cooperation and belongs to the field of gold leaching by a wet method.According to different occurrence states of the extremely fine-grained gold ore, the application sequentially carries out phased and targeted recovery in the order of flotation, magnetic separation, alkali leaching pretreatment and cyanide leaching, or sequentially carries out phased and targeted recovery in the order of alkali leaching pretreatment, cyanide leaching, cyanide breaking, flotation and magnetic separation.Through the multi-process cooperative process, the application realizes phased and accurate recovery of gold in different occurrence states in the extremely fine-grained gold ore, significantly improves the total recovery rate of gold, and has the advantages of mild process, controllable cost and good environmental protection, thereby providing a new technical scheme for efficient recovery of extremely fine-grained refractory gold ore and having a wide industrial application prospect.

The invention discloses a doubly-fed fan frequency control method giving consideration to power grid safety and unit capacity, and belongs to the technical field of new energy grid connection and power system control. According to the method, a frequency control process is divided into a frequency support stage and a rotating speed recovery stage. In the frequency support stage, support power is calculated based on the real-time rotating speed and the frequency change rate, and frequency drop is suppressed; in the rotating speed recovery stage, in order to solve the problems of secondary frequency drop and unit stall, the minimum power grid safety recovery time deduced based on a system swing equation and the unit self-adaptive recovery time based on the rotor kinetic energy state are introduced. And integrating the two time constraints to dynamically calculate the optimal total recovery time, and updating the power reference value in a rolling manner. The method can adaptively adjust the power withdrawal speed according to the real-time frequency change rate margin of the power grid and the current kinetic energy level of the unit, guarantees the safe operation of the unit, and prevents the secondary frequency drop of the power grid caused by too fast recovery.

The invention discloses a method for improving the recovery rate of ultra-micro-fine particle disseminated gold ore through multi-process cooperation, and belongs to the field of wet gold leaching. According to different occurrence states of the ultra-fine particle gold ore, staged and targeted recovery is sequentially carried out according to flotation, magnetic separation, alkaline leaching pretreatment and cyanidation leaching. Or sequentially performing staged and targeted recovery according to alkaline leaching pretreatment, cyanidation leaching, cyanide breaking, flotation and magnetic separation. According to the method, by means of a multi-process collaborative process, staged accurate recovery of gold in different occurrence states in the ultra-fine particle gold ore is achieved, the total recovery rate of gold is remarkably increased, the process is mild, the cost is controllable, the environmental protection property is good, a new technical scheme is provided for efficient recovery of the ultra-fine particle gold ore difficult to treat, and the method has wide industrial application prospects.

The invention provides a station comprehensive anti-seismic toughness index evaluation method, which comprises the following steps: determining the probability of each damage state of a component, determining the recovery time, the repair cost and the function loss of the component in each damage state according to a consequence function, and carrying out weighted summation to obtain expected recovery time, expected repair cost and expected function loss; integrating the expected recovery time, the expected repair cost and the expected function loss of all the components to obtain total recovery time, total repair cost and total function loss; a structure function curve is determined according to the repair strategy and the function loss, and then robustness, rapidity, lifting performance and optimization performance are determined; an average function factor is determined according to robustness, rapidity, lifting performance and optimization performance, a recovery time factor is determined according to recovery time and station construction time, and an economic loss factor is determined according to repair cost and station construction cost; and combining the average function factor, the recovery time factor and the economic loss factor to obtain a comprehensive anti-seismic toughness index of the station, and carrying out toughness rating.

The invention relates to the field of natural product extraction, and particularly discloses a high-recovery-rate preparation method of theanine, which comprises the following steps: diluting a raw material solution containing theanine, and then carrying out alkalinity adjustment and membrane filtration to obtain a pretreatment solution; loading the pretreatment liquid to molecular surface imprinting modified cation exchange resin for specific adsorption; carrying out selective elution by adopting a first eluent and a second eluent consisting of sodium chloride and ammonia water with different concentrations, and collecting an eluent rich in theanine; and finally, sequentially carrying out nanofiltration membrane concentration and spray drying to obtain a theanine product. Through a synergistic process of raw material pretreatment, specific adsorption, gradient elution and green refining, theanine is extracted from complex raw materials such as the tea polyphenol waste liquid with high selectivity and high recovery rate, the product purity can reach 96.5% or above, the total recovery rate is stabilized at 94% or above, and the process is continuous, environmentally friendly and suitable for large-scale production.

The invention discloses a flexible interconnected power distribution network island recovery method and a related device. The method comprises the following steps: establishing a load recovery model taking the maximum total recovery load capacity as a target function; setting constraint conditions based on the operation characteristics of the energy storage type intelligent soft switch; setting a node recovery sequence according to the importance level of the load, wherein the node recovery sequence is as follows: first-level load nodes are recovered preferentially; and based on the constraint condition, solving the load recovery model by using an improved intelligent optimization algorithm according to the node recovery sequence to obtain an optimal power supply recovery strategy. According to the method, the operation characteristics of the energy storage type intelligent soft switch are fully considered, and the node recovery sequence based on the load importance is determined, so that the feasibility of island operation of the flexible interconnected power distribution network based on the energy storage type intelligent soft switch is guaranteed. And the improved intelligent algorithm is used for solving the power supply recovery scheme, so that the power supply recovery capability of the power distribution network is broken through, and meanwhile, the node recovery sequence based on the load importance is also ensured.

The invention provides a flight delay recovery method and device, computer equipment and a storage medium, and belongs to the technical field of aviation, and the method comprises the steps: obtaining operation data after flight delay; taking minimization of the total recovery cost, the total delay time and the flight cancellation rate as optimization objectives, and constructing a multi-objective collaborative recovery mathematical model; generating an initial scheme for cancelling all the influenced flights based on the model, and constructing a to-be-recovered flight sequence in a descending order according to the flight cancelling cost; performing iterative recovery according to the to-be-recovered flight sequence, and in each iteration, sequentially performing available time slot search and flight exchange based on an optimization target based on the operation moment of the current to-be-recovered flight so as to gradually optimize the recovery scheme; and outputting the adjusted operation data of each flight as a final recovery scheme under the condition that iteration of all the to-be-recovered flights is completed. Therefore, the scheduling efficiency can be effectively improved, and the cost, the efficiency and the service quality can be balanced more comprehensively.

The application discloses a wind farm rotating speed recovery optimal scheduling method based on peak RoCoF occupancy, and belongs to the technical field of new energy grid connection and power system control. The application proposes to take the peak RoCoF occupancy as an optimization target of wind farm multi-unit recovery scheduling, discloses and utilizes the equal occupancy optimality principle, gives a closed expression of the optimal starting time, and further constructs a Pareto frontier curve of total recovery time-peak occupancy. The method can quickly obtain a field-level optimal scheduling scheme under the given total recovery time constraint through dichotomy, so that the optimal peak occupancy is only determined by the most stringent single machine and is irrelevant to the number N of units. The application significantly improves the safety margin of a high-penetration wind farm in a frequency event recovery stage, and provides a quantitative decision basis of recovery time vs. safety margin for a power grid operator.

According to the chemical liquid management analysis method and device, the storage medium and the computer equipment, when the analysis instruction is received, the target time period is determined through the received analysis instruction, the operation data of the liquid recovery system is obtained, the analysis range can be accurately positioned, and comprehensive data can be collected. And analyzing the long-term and short-term characteristics of the operation data in the target time period, and determining the use trend of the liquid, so that accurate mastering and prospective prediction of the use condition of the liquid can be realized. And then determining the total recovery amount and the recovery duration of the operation data in the target time period, calculating the recovery speed, and further refining the management indexes. Finally, a liquid management analysis report in the target time period is generated, the liquid management analysis report can effectively integrate and analyze data, the chemical liquid use and recovery process is optimized, and powerful support is provided for management decision making.