A preparation equipment and a process for a nylon salt solution. The preparation equipment includes a suspension preparation device, a first salt formation reactor and a second salt formation reactor. The suspension preparation device includes a feeding unit, a continuous feeding unit, a high-shear pump and a mixing reactor, the high-shear pump and the mixing reactor are cyclically connected with and in communication with each other through two connecting pipelines; the second salt formation reactor includes a second diamine feed pipe, a third diamine feed pipe, a circulation pipeline of the second salt formation reactor and an online near-infrared monitoring equipment located on the circulation pipeline of the second salt formation reactor.

A baby formula dispensing device is configured to automatically dispense water and powdered baby formula into a bottle and implement various accuracy checks to ensure the prepared mixture is accurate and safe for the baby. A user may input or select a pre-set option for the dispensing device to output a certain amount of formula and water to create the mixture in the bottle. The dispenser device may be filled with formula and water into independent reservoirs or otherwise receive the formula and water. The dispenser automatically measures and dispenses the correct amount of water and formula and dispenses into a bottle. Various sensors are utilized within the dispensing device to ensure the correct amount of formula and water is actually dispensed. Sensors may be placed on the water and formula dispensing circuits and on the scale on which the bottle sits, to perform multiple checks of the bottle's preparation.

A method for operating a mixing apparatus of a manufacturing plant comprises supplying multiple powdered products to the mixing apparatus. An inlet mass flow rate of the multiple powdered products into the mixing apparatus and a weight of the multiple powdered products in the mixing apparatus are measured. The multiple powdered products in the mixing apparatus are mixed to form a mixed product. The weight of the multiple powdered products in the mixing apparatus and an outlet mass flow rate of the mixed product from the mixing apparatus are predicted based on the measured inlet mass flow of the multiple powdered products. The predicted outlet mass flow rate of the mixed product from the mixing apparatus is corrected based on the measured weight of the multiple powdered products in the mixing apparatus. The mixed product is processed into final products.