Coal mine production requires ventilation because humans cannot live without oxygen. In addition, people continue to produce toxic and harmful gases in the underground production process, such as: carbon monoxide, carbon dioxide, nitrogen dioxide, sulfur dioxide, hydrogen sulfide, methane, etc. If these gases are not eliminated, people cannot produce. Therefore, ventilation is a necessary condition to ensure safe production, and the ventilator, a key device, consumes a lot of power due to its high power and continuous operation. According to statistics, the power consumption of the main ventilator accounts for about 15% to 30% of the total power consumption of coal mines. Therefore, it is an inevitable requirement to implement the concept of energy saving and consumption reduction at this stage to transform the ventilation system of coal mine roadways.
At present, the adjustment method of the new AC variable frequency speed regulating fan electric control system is very flexible, and the reliability is high, and the energy saving effect is extremely obvious. Therefore, the frequency converter has become the first choice for the mine fan control system.
1. The performance is safe and reliable.
Use the electrical value of the ventilator to select the corresponding curve for acceleration, so as to achieve the best soft start effect. The required air volume and wind pressure of the coal mine roadway should be fully considered, the position of the fan blades should be adjusted, and the reasonable rotation speed and working point should be determined according to the characteristic performance of the fan curve, so as to determine the use rate of the frequency converter. According to relevant regulations, coal mine production enterprises organize underground anti-wind drills every year to ensure that the ventilator can take anti-wind operation in time in the event of a disaster in the coal mine, so as to ensure that the coal mine has sufficient anti-air volume underground.
The copper bars and substrates inside the frequency converter should be treated with nickel plating and three-proof coating respectively to strengthen the adaptability of the frequency converter to the external environment, so as to better function in the coal mine working environment and not be affected by external factors. Generally speaking, frequency conversion equipment can still work normally under voltage fluctuations, and can continue to work when the grid voltage drops to a certain level. Flashover, etc.), the frequency conversion device can still maintain the working state, instead of stopping the operation immediately, and the fan is also in the working state.
2. Energy saving.
Among the coal mine ventilator control system equipment, the frequency conversion control system has a higher cost performance. Due to the existence of harmonic high-order components, the damage to the motor due to the asynchronous electronic flow will also increase, and the power efficiency factor of the motor will vary in varying degrees, so the selection of the frequency converter becomes the key. In general, products with low harmonic and high-order component ratios are the first choice. When choosing a motor, products with low energy loss and high efficiency should be the main products. Try to protect the core from damage.
The frequency conversion equipment should be direct-supply equipment, and should be consistent with the power supply voltage, without the need for intermediate transformation links, effectively control the pollution of the power grid, and also help to suppress high-order harmonics, so that the voltage shows strong compatibility characteristics, and at the same time It will not interfere with other facilities and has a high power factor.
Coal mine production requires ventilation because humans cannot live without oxygen. In addition, people continue to produce toxic and harmful gases in the underground production process, such as: carbon monoxide, carbon dioxide, nitrogen dioxide, sulfur dioxide, hydrogen sulfide, methane, etc. If these gases are not eliminated, people cannot produce. Therefore, ventilation is a necessary condition to ensure safe production, and the ventilator, a key device, consumes a lot of power due to its high power and continuous operation. According to statistics, the power consumption of the main ventilator accounts for about 15% to 30% of the total power consumption of coal mines. Therefore, it is an inevitable requirement to implement the concept of energy saving and consumption reduction at this stage to transform the ventilation system of coal mine roadways.
At present, the adjustment method of the new AC variable frequency speed regulating fan electric control system is very flexible, and the reliability is high, and the energy saving effect is extremely obvious. Therefore, the frequency converter has become the first choice for the mine fan control system.
1. The performance is safe and reliable.
Use the electrical value of the ventilator to select the corresponding curve for acceleration, so as to achieve the best soft start effect. The required air volume and wind pressure of the coal mine roadway should be fully considered, the position of the fan blades should be adjusted, and the reasonable rotation speed and working point should be determined according to the characteristic performance of the fan curve, so as to determine the use rate of the frequency converter. According to relevant regulations, coal mine production enterprises organize underground anti-wind drills every year to ensure that the ventilator can take anti-wind operation in time in the event of a disaster in the coal mine, so as to ensure that the coal mine has sufficient anti-air volume underground.
The copper bars and substrates inside the frequency converter should be treated with nickel plating and three-proof coating respectively to strengthen the adaptability of the frequency converter to the external environment, so as to better function in the coal mine working environment and not be affected by external factors. Generally speaking, frequency conversion equipment can still work normally under voltage fluctuations, and can continue to work when the grid voltage drops to a certain level. Flashover, etc.), the frequency conversion device can still maintain the working state, instead of stopping the operation immediately, and the fan is also in the working state.
2. Energy saving.
Among the coal mine ventilator control system equipment, the frequency conversion control system has a higher cost performance. Due to the existence of harmonic high-order components, the damage to the motor due to the asynchronous electronic flow will also increase, and the power efficiency factor of the motor will vary in varying degrees, so the selection of the frequency converter becomes the key. In general, products with low harmonic and high-order component ratios are the first choice. When choosing a motor, products with low energy loss and high efficiency should be the main products. Try to protect the core from damage.
The frequency conversion equipment should be direct-supply equipment, and should be consistent with the power supply voltage, without the need for intermediate transformation links, effectively control the pollution of the power grid, and also help to suppress high-order harmonics, so that the voltage shows strong compatibility characteristics, and at the same time It will not interfere with other facilities and has a high power factor.
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