Mixer configuration and operation overview
Mixing machinery is widely used in the production processes of chemical, pharmaceutical, food, aquaculture, plastics, and other industries. Mixing machinery is designed according to the requirements of the use of working conditions to consider a certain margin, and the mixer in the actual use of the process, then It is not necessary to work at the maximum speed. There is a lot of time to work in the non-full load state; the traditional mixers usually do not adjust or use mechanical speed; the mechanical speed regulation will increase the loss of the mixer and at the same time make the mixer work In the fluctuating state, the mixer equipment also works in the "big horse-drawn car" state, which is not economical.
The relationship between the power and speed (frequency) of the motor of the pump equipment in the frequency conversion speed regulation mode can be known: the energy-saving effect of the speed control method of the inverter is very high, which is better than any of the previous speed adjustment methods and can pass Energy saving recovers investment in a shorter period of time. Because the load of the pump is similar to that of the liquid mixer, by installing the frequency conversion speed-regulating energy-saving device on the mixer device, many problems existing in the use of the traditional mixer can be solved once and for all, and the investment can be recovered through frequency conversion and energy saving.
Mixer frequency conversion scheme
According to the characteristics of the mixer configuration and operating torque, it is usually installed on the mixer with a set of frequency converter (selection ratio of the motor power amplifier); save the original frequency system of the mixer, and the frequency conversion system with the mixer They can be switched to use each other, and interlocked between the power frequency and the frequency conversion. In the process of actual work, according to the characteristics of the stirring material and the time for adding other chemical substances, the program running function of the inverter can be used. Up to seven stages of automatic program operation modes with different speeds and different times can be set. Reduce the labor intensity of workers and improve production efficiency. Utilize the communication function of the frequency converter, cooperate with IPC and configuration software,etc., also can realize and carry on the networking control with the main control room, facilitate the automatic control of the supervisory staff. In order to ensure the reliability of the system, it is recommended to increase the frequency-frequency soft-start bypass device on the frequency conversion system, and to order the work/inverter integrated cabinet.
KeChuang source inverter features
1. Applicable to high inertia, high precision, high potential position and other high-end places, the main loop design adopts positive and negative busbar superposition and SCR contactless optimization technology, more suitable for humid, dust and other harsh occasions.
2. Built-in torque compensation for superior starting torque and performance
3. Open loop low speed high rated torque output, speed control up to 100:1
4. Advanced motor auto-tuning work motor work in the best condition
5. Built-in slip compensation function to run efficiently
6. Built-in RS-485 communication interface
7 Built-in PID regulator
8. Can set the energy-saving operation mode
9. Various parameters online monitoring function and online adjustment function
Converter transformation control principle
Start/stop and speed control can be performed on the console to connect the frequency and current signals back to the console of the control room for monitoring.
Mixer transformation of the advantages of frequency control device
1. Mixer frequency conversion energy-saving device for open-loop regulation;
2. Soft start / soft stop mode can reduce the starting impulse current;
3. Inverter with intelligent protection, automatic shutdown when fault occurs;
4. Different speeds can be used according to different processes;
5. Energy saving through frequency conversion speed regulation: As the motor of the agitator operates in the variable frequency speed control mode, its power and its rotation speed are similar to those of the pump, that is, its operating power is proportional to the third power of the rotation speed (frequency), and the viscosity is high. This proportion will decline (usually between the second and third powers). Therefore, when using the inverter mode to adjust the speed, a very considerable saving rate will be obtained.
System performance after retrofit
(1) Using inverter control to achieve maximum energy savings under conditions that meet the requirements of use.
(2) Reduced vibration and noise and wear due to deceleration and soft-start, extended equipment maintenance cycle and service life, improved MTBF (equal fault maintenance time) value of equipment, and reduced impact on the grid and improved System reliability.
(3) The system has various protection measures, which greatly improve the system's operating rate and safety and reliability.
(4) The frequency conversion speed control system and the power frequency control system can be set to interlock with each other without affecting the operation of the original system. In the case of inspection, maintenance or failure of the variable frequency speed control closed loop control system, the original power frequency control system can still be normal. run.
Parameter Description: Set related parameters of the mixer system, please refer to the pump settings.