The reactor Weighing system takes the reactor as the control unit, and sets up the formula setting sector for different formula feeding and conveying in each reactor, which can flexibly cope with the needs of different formulas for different production batches.

The formulation, feeding and discharging of the automatic feeding system is fully computerized. In addition to the hopper, the scale part has dynamic weighing module, precision amplifier, analog/digital converter, microcomputer, monitor, printer and execution system. The touch screen control system can control several reaction tanks and agitators, and can control the time of dry mixing and wet mixing, and can formulate several to dozens of materials, and can simultaneously display the batching process and print the name of each material, quality, total mass, cycle time, formula, daily report, monthly report and so on. Computerized automatic batching production line has large storage capacity of formula, many varieties of batching, high speed, high accuracy, abundant software available, convenient program modification, and is a product with high degree of automation. Through weighing instrument or touch screen, the required weight of various materials is set, and then automatically conveyed to the Batching system by the winch in order for automatic weighing and flow control, so as to realize accurate measurement and batching.

The process steps of the reaction kettle weighing system decompose and control the flow as follows:

1. Raw material conveying

Before conveying raw materials, internal logic judgment is made to determine whether the raw materials can be conveyed or not, and all the following requirements should be met for conveying: the liquid level of raw material storage reactor A/B/C must be greater than the low liquid level value, and the temperature must be higher than 120℃; whether the conveying pumps P103A and P103B are in operation or not (both of them must be kept in a stopped state at the same time); the weighing reactor A/B should have at least one weighing unit with a weight of 0kg.

2. Selection of raw material storage reactor

For the selection of storage reactor, among the reactors meeting the conditions of raw material transportation, select the one with the highest liquid level. After the selection of raw material reactor is completed, the dosage selects the pneumatic valve of the corresponding pipeline, and the raw material pump delivers the weight of the quantitative range to the specified reactor.

3.Metering reactor selection

Metering kettle selection, under the condition of meeting the production requirements, select the weighing unit weight 0kg metering kettle, if both metering kettles are 0kg, the default selection of metering A kettle.

4. Trigger pneumatic valve start

In the PLC program internal selection of all the control kettle, pneumatic valve in the normally open state, pneumatic pump to the kettle delivery of liquid, through the measurement of kettle after the measurement kettle automatically read the weight of the quantitative range, reach the set specified weight of the pneumatic ball valve is automatically closed.

5. Raw material transfer pump start

After the dosage pneumatic valves are triggered to open one by one, the last pneumatic valve is opened in place of the rising edge signal, triggering the timer to start, timing 3S (can be set), start the raw material delivery system pump.

6. Raw material conveying dosage pump stop

In the process of conveying, metering reactor weighing module for weight measurement, when the weight measurement value reaches the weight of raw materials in the formula, stop the pump of raw material conveying system.

7. Close the dosing pneumatic valve

After the raw material conveying dosage pump stops, take the falling edge signal of the stop signal, trigger the timer to start, after timing 3S (can be set), according to the dosage pneumatic valve open in reverse order to close in turn.

8. Transportation of raw material reactor

Before conveying raw materials, internal logic judgment is made to determine whether the raw materials can be conveyed, and all the following requirements should be met: the liquid level of the raw material reactor must be greater than the low level value, and the temperature must be higher than 100 ℃; whether the pump P104 for conveying dosage is running (it must be kept in a stopped state).

9. Selection of raw material reactor and metering reactor

Recipe into the system, that is, the selected recipe number, metering reactor selection according to the raw material delivery when you choose to carry out the material number to start.

10.Individual add formula interface

In the target mixing kettle selected formula, dosing tank next to display the formula number; the other side of the display of all the formula name, in the process of dosing system feeding, the corresponding powder flashing, each kind of material dosing system is put into the end of the green, all put into the end of the display feeding is complete. When this kettle selects the formula again, the Dosage system resets and the data is overwritten. During the dosage process, this interface allows the operator to see at any time which step is being carried out in each kettle, in order to make the right emergency measures in case of emergency.

11. Rearrangement of Mixing Plant Conveyor to Target Mixing Tank Lines

May be in the busy time, the dosage system will be a certain time to receive several commands, at this time should be considered in the master station to do an interrupt, as well as the priority of the insertion of the command, which needs to be communicated with the weighing and dosage system to negotiate the integration.

12. Metering kettle to the production line, without any metering and level monitoring in the metering tank, keep the manual feeding.