4 results about "Residual mass" patented technology

The present application relates to the technical field of control system, and especially relates to a vacuum medium frequency furnace operation regulation and control method and system for gas atomization powder production. The method comprises the following steps: acquiring the furnace body inclination angle, the actual residual mass of the metal liquid in the crucible and the actual flow rate of the crucible in the gas atomization pouring process of the vacuum medium frequency furnace in real time; determining the crucible erosion index at the current time; determining the fluid sensitivity factor at the current time; determining the dynamic scaling coefficient for adjusting the fuzzy PID controller output gain at the current time; and performing the operation regulation and control of the vacuum medium frequency furnace based on the improved fuzzy PID controller. By constructing the crucible erosion index and the fluid sensitivity factor, the present application dynamically optimizes the fuzzy PID control gain, matches the crucible state change in real time, solves the problem of poor adaptability of the fixed rule, improves the regulation and control precision and stability of the vacuum medium frequency furnace, and ensures the stable operation of the gas atomization powder production process.

The invention discloses a lithium battery pole piece coating drying evaporation capacity on-line estimation method and device, and the method comprises the steps: obtaining the solvent mass ratio of a pole piece at an inlet of a drying oven, the total solvent residual mass ratio at an outlet of the drying oven and the surface density of the outlet, and calculating the total evaporation solvent mass of a pole piece region per unit length; humidity collection is carried out through temperature and humidity sensors arranged at an air inlet and an air outlet of each section of drying oven, and the air inlet absolute humidity and the air outlet absolute humidity corresponding to each section of drying oven are obtained; on the basis of a mass conservation equation, an optimization problem is constructed according to the air inlet absolute humidity, the air outlet absolute humidity and the change rate of the air outlet absolute humidity along with time, the optimization problem is solved through a particle swarm optimization algorithm, and the unit time evaporation capacity of each drying oven is obtained; calculating according to the unit time evaporation capacity and the retention time of the pole piece in the single-section drying oven to obtain the solvent evaporation component of the pole piece in each section of drying oven, and the sum of the solvent evaporation components of each section of drying oven is equal to the total mass of the evaporation solvent.

The present application provides a method and system for quantitatively evaluating the fluidity of coal water slurry. The method is to add the coal water slurry into a container with a discharge port and a discharge switch at the bottom, measure the initial mass m1 and the residual mass m2 after the coal water slurry is discharged from the discharge port of the container bottom within the discharge time t, and calculate the fluidity evaluation parameter τ of the coal water slurry according to the following formula (1); wherein the formula (1) is: k is a coefficient; the discharge time t is the time interval counted from the start of the discharge of the coal water slurry to the end when the mass change △m of the coal water slurry is less than 0.1g within 10s. The system includes a platform, a weighing timer, a container support, a container, a discharge switch, a collector and a controller. The method and system of the present application can quantitatively evaluate the fluidity of the coal water slurry.

The application discloses an online estimation method and device for evaporation quantity of lithium battery pole piece coating and drying, which comprises the following steps: obtaining the solvent mass ratio of the pole piece at the entrance of the oven, the total solvent residual mass ratio at the outlet of the oven and the outlet area density, and calculating the total evaporation solvent mass of the pole piece area per unit length; collecting humidity through the temperature and humidity sensors arranged at the air inlet and air outlet of each oven to obtain the absolute humidity of the air inlet and the absolute humidity of the air outlet corresponding to each oven; based on the mass conservation equation, the optimization problem is constructed according to the absolute humidity of the air inlet, the absolute humidity of the air outlet and the change rate of the absolute humidity of the air outlet with time, and the particle swarm optimization algorithm is used to solve the optimization problem to obtain the evaporation quantity per unit time of each oven; the evaporation quantity per unit time and the residence time of the pole piece in the single oven are calculated to obtain the solvent evaporation component of the pole piece in each oven, and the sum of the solvent evaporation components of each oven is equal to the total evaporation solvent mass.