Weighing dosing system can be used for material or chemical reaction in a metering equipment, strict control of the reaction temperature, pressure, stirring and material concentration and other important parameters, so that the whole reaction process is more reasonable and adequate. Can be used to meet the reaction process of weighing ingredients, heating evaporation, cooling and low speed mixing weighing equipment. Reaction equipment used to complete sulfonation, nitration, hydrogenation, alkylation, polymerization, condensation and many other processes of organic dyes and intermediates.
020-34563445The automatic Batching system adopts cutting-edge electronic technology, control technology, modern control theory, and absorbs the advantages of various automatic batching so far. It is a small batching system that integrates the functions of intelligent instrument, multi-function loop controller, sequence controller and programmable controller. With advanced control strategy, graphical operation interface and online real-time configuration tools, it realizes real-time monitoring, recording, operation, management and the integration of continuous control, logic control and sequence control of industrial processes. It is a new type of computer automatic batching system that realizes complex and diverse industrial automation ideas in various industries, especially suitable for enterprise batching and technical transformation of control equipment.
The dosing is divided into dry material and wet material two parts, dry material dosing control part is mainly the given control and automatic adjustment of the mixture, the amount of dosing is proportional to the molding speed, and its ratio remains unchanged. The feeding control of powder is completed by screw ram, impeller Feeder, screw conveyor, bucket elevator and metering screw scale. After the feeding system is started, the PLC starts and stops and adjusts the speed of each motor according to the process requirements, and sets the feeding amount through the man-machine interface. The analog output module of the PLC outputs the given signal of 4~20mA to the metering spiral scale, which controls the feeding speed according to the given signal, and the spiral scale transmits the instantaneous and cumulative amount of the feeding back to the PLC. Through communication, they are displayed in the man-machine interface and the host computer, so that operators and managers can respectively monitor online and adjust the feed amount in time according to the process requirements. The feed control of additives, starch and coagulant is basically the same, and the feed control is composed of speed regulating screw conveyor, stirring motor, impeller feeder, bucket elevator and so on. The control mode is basically the same with the powder, but the PLC analog output module output 4~20mA given signal directly to the speed control screw conveyor, according to the formula set by the man-machine interface PLC automatically adjust the screw conveyor feeding speed. The above proportioned powder enters the screw conveyor and the mixed screw conveyor respectively, and finally enters the vertical mixer and slurry mixing through the conveyor, and enters the next forming process after full mixing.
A cascade control loop is adopted in the feeding system to ensure the adjustment of the steam intake to meet the requirement of dissolved oxygen concentration and eliminate the influence of pressure fluctuation in time. If the concentration of dissolved oxygen is adjusted by adjusting the speed of the mixer, the fluctuation of the pressure in the reactor has an effect on the concentration of dissolved oxygen. When the concentration of dissolved oxygen is controlled by adjusting the air flow through the reactor, the pressure of the reactor is considered to be constant if there is automatic control. Just control the concentration of dissolved oxygen by adjusting the amount of air supplied. The practice of adjusting the speed of the reactor and the amount of air supplied simultaneously.
