The Concentrated feeding system adopts Siemens S7 series PLC, and the CPU uses a high-performance 315-2DP processor to ensure the stability and speed of the control system. Including the main control station, the main control station is composed of a S7-300 PLC. The main station and each remote I/O station adopt PROFIBUS communication network to ensure reliable, timely and high-speed communication of the control system. At the same time, the main control station is also connected with the process monitoring computer, receiving the instructions and management information of the process monitoring level, and transmitting the real-time operation data of the field device upward. The control station is directly connected with various devices on site for monitoring and control, among which, the control station completes the collection and control output of self-locking, start, stop and other signals of equipment such as spiral Electronic scale in the warehouse, as well as the adjustment of various materials in the warehouse. The I/O station completes the collection and control output of self-locking, starting and stopping signals of equipment such as spiral scale and impeller Feeder, as well as the adjustment of various materials in ash storage tank.

The feeding system mainly realizes the following functions:

(1) Centralized automatic and on-site manual batching.

(2) Start the device in a centralized manner.

(3) Fault interlock shutdown.

(4) ingredient measurement.

(5) Two-way interlock between dust removal tank and mixing machine.

The control station is the key to the high quality, high efficiency and stable operation of the entire production line.

The system consists of five parts:

1. Control part: The upper computer adopts Advantech P4 industrial control microcomputer, PLC communication module and switching input and output module, as well as manual-automatic control switch, manual control button and indicator light are all installed in the integrated control cabinet for easy operation.

2. Software part: customized according to the basic requirements of the Weighing system and the actual needs of users.

3, weighing part: using high-precision weighing module, combined with weighing control instrument production.

4, the execution part: using pneumatic valve control, screw frequency conversion for feeding, discharging control.

5, feeding part: screw feeding is responsible for feeding.

Action flow

1. The weighing bin device is equipped with a weighing sensor and connected to the industrial computer by rs232. The system is designed to manually check the zero of each weighing bin when it is shut down, which can monitor whether the zero position of the weighing bin is normal. Automatic zero check during continuous batching operation can correct the zero position change of weighing bin and ensure the measurement accuracy.

2. After the operator clicks the battering operation process, the PLC controls the pneumatic valve and screw of the first kind of raw material feeding, and the raw material is slowly added to the weighing bin. The computer monitors the signal transmitted by the weighing module under the weighing bin in real time, and compares it with the target value set by the formula. * The pneumatic valve and screw of raw material feeding are closed, and the total weight of the weighing bin and the added raw material is measured after stability, and this value is used as the zero position before the second raw material feeding.

3, then start the feeding process of the second raw material, so repeated to the second, third,... Until the sixth raw material is fed.

4, the feeding process ends and meets all the pre-set feeding conditions, and the feeding process begins. Discharge pneumatic valve, the mixture under the action of gravity natural outflow. The system monitors the signal transmitted from the weighing module under the weighing bin in real time. When the total weight of the weighing bin is detected to return to the initial zero, the discharge valve closes and the discharge process ends.

5. The operator can set the order of opening each feed in advance.

6, the system can record the tank number in operation, the actual feeding amount of each raw material, the deviation from the formula set target value, the feeding start and stop time and the feeding time, as well as the feeding start and stop time and the feeding time and other operating data.

7, through the upper computer application program, you can query and print the original data and statistical reports of the system operation.