summarize

Ammonia dozing device is used to automatically adjust the PH value of the boiler feed water, so that the PH value of the boiler feed water is kept within a certain range and the operation is in the best state, so as to prevent the acid and alkali corrosion of the boiler and other thermal equipment due to the imbalance of the PH value of the feed water, so that the thermal system works in the best state, saving energy by 30~50%. The amount of ammonia can be saved by 20~300% to extend the service life of thermal equipment and ensure the long-term stable and safe operation of thermal equipment.

◎ Working principle

The device is composed of a control system and a dosing system. The control system is composed of an industrial acidity meter, a regulator, a frequency converter and a control circuit. The dosing system is composed of a dosing pump and a drug group

Agreed. After the sample water is cooled by the cooler, the temperature is between 20 and 35℃. The PH value of the tested sample water is detected by the pH meter. On the one hand, it is displayed in a digital way, and on the other hand, it is converted into a standard signal of 4 to 20mA and output to the MPS programmable controller. According to the comparison results, the logical calculation is carried out according to a certain algorithm, and the corresponding 4~20mA current control frequency converter is output to change the speed of the motor of the dosing pump. The change of the speed of the motor of the dosing pump meets the requirements of controlling the quantity of the dosing pump, so that the parameters of the controlled object run in the best state.

The system has a protection function: when the liquid level of the medicine tank is low, a low level contact signal is sent to the MPS, and the MPS will not start the dosing pump; when the pressure of the dosing pipeline is high, a high pressure signal contact is sent to the MPS, and the MPS will stop the dosing system.

◎ Special point

1, the PH meter is a single-chip intelligent instrument, the electric electrode is integrated, reflecting the acidity accurately.

2, the controller is MPS programmable controller, with the characteristics of flexibility and stability.

3, the user can choose whether to use the inverter according to the type of dosing pump they use.