The process of the weighing Feeding machine mainly includes three links: feeding, conveying and exhaust. The feeding stage achieves the quantitative feeding of dust particles in the screw conveyor by controlling the opening and closing of the feeding valve. During the feeding process, the feeding valve opens, and the dust particles in the ash hopper of the dust collector enter the screw conveyor through the feeding pipe. The conveying process achieves the operation of conveying dust particles by controlling the opening and closing of the boosters and the conveying pipelines.

The weighing feeding machine mainly consists of a hopper scale and a batching and weighing screw. According to the pre-set feeding amount, the batching and weighing instrument and PLC start the batching and weighing screw to add powder or granules to their respective hopper scales at a certain feeding speed. After the weighing is completed, the materials are distributed on the aggregate screw and then put into the mixer for mixing. At the same time, the feeding machine, based on the pre-set feeding quantity and sequence, The weighing instrument and PLC start the batching and weighing screw to add the small materials A, B, C, and D(up to 4 types of small materials can be configured) into a hopper scale in sequence at a certain feeding speed. Then, through the mixing screw, the powder and granular materials are added into the screw machine simultaneously. The powder and granular materials are then put into the mixer for mixing. The next batching process should be carried out only after all the materials in the scale hopper have been emptied.

First, press the automatic sending button. The return air valve will open automatically. Then, the feed valve and the airtight valve will weigh automatically. After the feeding machine receives the signal of the feed valve opening position, the feeding screw starts and the bin pump begins to feed. Before the high material level signal of the silo pump appears, the screw will keep working until the silo pump reaches the high material level, and the operation panel will display the high material level status of the silo pump. When the material level of the silo pump is high, the screw stops, and the feed valve, tight air valve and return air valve close. After the signal of the feed valve and return air valve being closed reaches the system, the intake valve opens, and the silo pump takes in air. After a few seconds, the booster starts to work. When the pressure of the silo pump drops to the set value (low pressure), after a few seconds, the silo pump stops sending, the intake valve closes, the booster closes, and after a delay, the return air valve opens After another delay of 4 minutes, the system will not enter a transmission cycle. If the stop button is pressed during the sending and waiting process, the system will not enter the next sending cycle. When the emergency stop button is pressed during the sending and waiting process, the system will immediately stop sending or discharging materials.