Practical application of inverter in high pressure blower
The thermal power plant reduced the energy consumption of the equipment, improved the production efficiency, and achieved considerable social and economic benefits. The original operation mode of the blower is step-down start and power frequency operation. The air volume is also adjusted by adjusting the damper.
The disadvantages of this control method are large power waste, large fuel waste, poor real-time adjustment, large noise, and high labor intensity. With the large-scale adjustment of the power generation load, the air volume of the blower is often in a kind of due to changes in the boiler load. A large amount of energy is wasted on the baffle in the inefficient state.
With the rapid development of high-voltage frequency conversion technology in recent years, frequency conversion of boiler drums and induced draft fans has been widely used.
Through market research, we have introduced the PowerSmartTM series of high-voltage inverters. This device uses advanced power electronics GBT and multi-level topology circuits and PwM modulation strategies, and is controlled by a high-speed digital signal processor DSP.
Before the transformation, the blower current was about 30A, and the fan baffle opening was between 6070. After the transformation, the blower current was reduced to 20A, which was reduced by 13, and the baffle opening was 100%. The operating conditions are based on continuous operation for 24 hours, and the annual operating time is calculated on the basis of 300 days.The annual energy saving when the frequency conversion speed regulation is P = 1.732 × 6 × 10 × 0.95 × 24 × 300710812kWh is 0.48 yuan per kilowatt Electricity calculations can save electricity costs about 341190 per year
Other effects of applying high-voltage variable-frequency speed-regulating systems: Improved process. After the inverter is put in, the dust removal fan can adjust the air volume very smoothly and stably, and the operating personnel can freely adjust and control the operation parameters of the dust removal fan, which improves the efficiency.
Extend the life of motors and fans. Generally, the dust removal fan is a centrifugal fan, which has a long startup time and a large startup current (about 68 times the rated current), which has a large visual impact on the motor and the fan, which seriously affects its service life.
After using variable frequency speed control, soft starting and soft braking can be achieved, which has almost no impact on the motor, which can greatly extend the service life of the machine.Reduce the wear of the machine and the fan impeller. After installing the variable frequency speed control, the fan often works at Running at a lower speed of 150 rpm than the original fixed speed, therefore, greatly reducing the wear of the fan impeller and reducing
Fan vibration, prolong the overhaul period of the fan, save maintenance costs and time, and facilitate the realization of the system. In addition to the automation system, the air volume of the system needs to be changed according to the requirements of the process. Linear problems are often caused by excessive damage to the actuator and changes.
Due to the current non-linear problem, the adjustment process is lost, and the automatic system element is working. However, the speed must be adjusted to maintain the linear high precision range of 0.1-0.01Z, which creates superior conditions for the automation of the first-generation system.
I was brought to South by a blower to raise the production efficiency, and the economic and social benefits are considerable. In the future, we will further strengthen the technical transformation and build our plant into a high-tech, high-efficiency modern power plant.