41results about How to "Change ingredients" patented technology

The invention belongs to the technical field of composite materials, and particularly relates to an Mo / Ni / Co / P / C composite material as well as a preparation method and an application thereof. The material is prepared with the following method: in a three-electrode system, a carbon-based substrate taken as a working electrode, a platinum net taken as an auxiliary electrode and Ag / AgCl taken as a reference electrode are connected with an electrochemical workstation, potentiostatic deposition is conducted in a mixed solution of nickel sulfate with concentration of 30-70 g / L, sodium hypophosphitewith concentration of 20-40 g / L, nickel chloride with concentration of 10-20 g / L, boric acid with concentration of 30-35 g / L, cobalt chloride with concentration of 30-50 g / L and sodium molybdate withconcentration of 40-50 g / L, magnetic stirring is conducted throughout the deposition process, initial potential set on the working electrode during electroplating is (-1.5)V-(-1)V, electroplating timeis 5-30 min, electroplating temperature is set to be 25-35 DEG C, a power supply is turned off finally, and the Mo / Ni / Co / P / C composite material is prepared. The Mo / Ni / Co / P / C composite material is taken as a cathode material of a microbial electrolytic cell to treat coking wastewater and produce hydrogen synchronously, waste is changed into treasure, and a new idea and a new perspective are provided for impending coking wastewater treatment.

The invention provides a lever type hovering characteristic test simulating device and method of a Mars unmanned aerial vehicle rotor wing system, and relates to the field of hovering characteristic test of unmanned aerial vehicle rotor wing systems. The lever type hovering characteristic test simulating device aims to solve the problems that an existing hovering characteristic test device can only be used for evaluating the hovering performance of an Earth unmanned aerial vehicle rotor wing system, simulation of the Mars environment cannot be achieved, the applicability is poor, and the measuring errors are large. A hovering experiment device is located on the inner bottom face of a Mars atmosphere environment simulating device, and the Mars atmosphere environment simulating device is used for simulating a low-vacuum carbon dioxide gas environment. A base serves as the fulcrum of a balancing plate, a rotor wing of the rotor wing system is mounted reversely, so that the lifting force direction goes downwards vertically, a torque sensor is used for measuring a torque generated in the rotating process of the rotor wing of the rotor wing system, a weight is placed in a weight disk soas to balance the weights of the two ends of the balancing plate, thus the balancing plate can be in a balanced state, and a force cell is used for measuring the lifting force generated in the rotating process of the rotor wing of the rotor wing system. The lever type hovering characteristic test simulating device is used for testing the hovering characteristic of the Mars unmanned aerial vehiclerotor wing system.

The invention belongs to the field of 4D printing and manufacturing, and specifically discloses a 4D printing method and product of a functionally gradient copper-based shape memory alloy intelligent component. The method includes: dividing the three-dimensional model of the intelligent component according to the required deformation amount and function in the application, setting the printing parameters of the large deformation recovery area, small deformation recovery area and bearing area, and using copper The base memory alloy powder is used as the raw material, and the large deformation recovery area, the small deformation recovery area and the bearing area are respectively 4D printed to obtain functionally gradient copper-based shape memory alloy intelligent components composed of different phases. The product of the present invention is obtained by the above-mentioned 4D printing method. The present invention controls the forming process parameters and printing materials of different regions to realize the continuous change of composition, structure and superelasticity, so that each region can adapt to the required deformation and function of intelligent components in application.

The invention discloses a method for preparing a high-flux polyvinylidene fluoride hollow fiber membrane. The method comprises the following steps of: mixing polyvinylidene fluoride, a gaseous pore-forming agent, a hydrophilic modifier, additives and organic solvents and making a membrane-making solution; allowing an internal gelling medium and the membrane-making solution to pass through spinning nozzles on dry / wet spinning equipment at the same time, injecting into an external gelling medium, and performing phase-splitting treatment to make a primary membrane; and performing special chemical treatment on the primary membrane with a chemical treatment liquid to obtain a high-flux polyvinylidene fluoride hollow fiber membrane. The invention is characterized in that the membrane is reinforced with the pores by chemical reactions between the internal gelling medium, external gelling medium and chemical treatment liquid and the gaseous pore-forming agent; and the polyvinylidene fluoride hollow fiber membrane has a high flux, a high strength, a high entrapment rate and good hydrophilicity.

The invention relates to a low NOx hybrid combustion system and method for preheating semi-coke by high-temperature flue gas of a power station boiler. According to the hybrid combustion system and method, a preheating pipeline and a cyclone preheating separator are adopted, the semi-coke is directly preheated through the high-temperature flue gas, so that the temperature of the semi-coke sprayedinto a hearth is remarkably improved; meanwhile, a stable ignition region for combustion of bituminous coal is arranged at the lower part of the hearth, so that ignition and flame stabilization of combustion of ultra-low volatile semi-coke fuel are facilitated, and the large proportion (larger than or equal to 45%) blending combustion of the semi-coke fuel of the power station boiler is achieved;a preheating product with the relatively strong reducibility is produced while the semi-coke is preheated, the preheating product is directly sprayed into the middle part of the hearth through a combustor, a NOx reduction zone is formed on the upper part of a preheating semi-coke combustion zone, so that emission of NOx is greatly reduced, and low NOx combustion of ultra-low volatile carbon-basedfuel is effectively realized; and air or pure oxygen over fire air is injected into the upper part of a combustion region of the hearth so that the fuel can be completely combusted, and the carbon content of the fly ash and the NOx emission can be effectively reduced.