Shandong zhangqiu yi tai machinery manufacturing co., LTD
Contact: xin-sheng cheng
The true: 0531-83209474
WeChat ID: 13705411652
Q Q: 2458379166
Mail box: 6411111111 @163.com
Web site: www.zqlcfj.com
Company address: Shandong zhangqiu MingShui hou home park street
Roots fan energy saving
Roots blower air pressure is not restricted by the fan speed, no matter how the wind speed changes can remain the same. While the air volume is proportional to the fan speed, namely Q = KN
Q: said airflow N: for fan speed K: for coefficient
From the formula, the air volume adjustment, entirely by the frequency converter to change motor to achieve stepless speed change, rise to adjust the effect of air volume. According to the fan of the 15 hz low frequency field application process, usually at around 35 hz, have individual moment 50 hz full airflow run, due to the basic shaft kiln process is consistent, so in different amount of shaft kiln air regulation is basically the same, every shaft kiln application of frequency conversion technology can obtain 40% energy saving effect.
Roots blower a constant torque load, the power saving rate is proportional to the droop or N % = delta N %, though different from general fan and water pump power saving rate is higher, but because of its power is larger, but not bad, as long as the furnace wall is continuous 24 hours work, and start the time also is very long. So electricity saving potential, the high cost of energy saving.
After technical innovation of roots blower, changed the past to adjust export (import) valve opening ways to adjust the production mode of wind pressure or volume, reduce Labour intensity, adjust good timeliness, raised the qualification rate of products, consumption decreased obviously.
Shaft kiln discharging machine and energy saving
Shaft kiln unloading machine is to use 18.5 ~ 30 kw slip speed governing motor, speed control in 300-1000 RPM, usually it is according to the condition of the kiln process, to control the discharge rate. Replace the slip motor adopts the method of frequency control of motor speed. After multiple manufacturers of application results show that the average energy saving 40% or so, why the slip motor frequency conversion reform will have so much energy saving effect, because of using the method of slip speed yes a low speed control method of energy dissipation,
1, the slip motor main shaft power output: P0 ∝ M0 * N0
P0: said shaft power output M0: it means the load torque N0, said the main motor speed
2, slip head output power: P1 ∝ M0, N1
P1: it means the output power N1: slip speed
3, slip head loss power: delta P = P0 - P1 ∝ M0 (N0 - N1)
By sliding head loss power formula can see clearly that the slip motor rotation speed is lower, the greater the waste of energy, but the speed of the unloader usually run around 400 RPM, so use frequency control of motor speed way will have 50 to 60% of the energy saving effect.
Shaft kiln in cement plant, in addition to unloading machine is using slip rate control motor, there are a lot of equipment is also a slip motor, must further exploration should be comprehensive slip motor variable frequency transformation of low energy consumption, energy saving prospect is promising.
The centrifugal fan, water pump energy saving
For the centrifugal fan, water pump frequency conversion transformation also has the huge energy saving potential. By boiling boiler high-pressure centrifugal fan frequency control of motor speed was used to adjust the air volume, prove its energy saving effect in 30 ~ 50%, water pump energy saving effect of inverter is as high as 70%.
Centrifugal fan and pump flow rate is proportional to the speed of such equipment Q ∝ N, pressure and speed is proportional to square of H ∝ N2, power and speed of the direct P ∝ N3 (N: Q: flow said speed H: shows the pressure P: power)
Change speed linear change of the flow and power consumption is a cubic relationship change, therefore when adjusting the air volume or flow such as a 20% reduction in air volume or flow rate, power consumption will fall by 50%. But must pay attention to speed and pressure may be square, a fall of 20% when the speed pressure will drop 64%, so we must pay attention to the technological requirements of pressure range can't like roots blower, don't have to consider the impact of speed and wind pressure.
Centrifugal fan, air volume and flow of the pump device of traditional control, a large amount of energy consumption in air door or shut off valve on the resistance of damper or valve control the flow of power consumption of the river closure and flow relationship: P = P0 + k. Q Q: K: said flow coefficient P: said P0 power consumption: basic power said.
By above (right) damper or shut off valve control and frequency control of motor speed adjustment, you can see in the flow range, adopt the method of frequency control of motor speed has great energy-saving potential, therefore in cement plants for water pump or other frequency on the centrifugal fan also will get a lot of energy saving effect.
The system characteristics
After the frequency conversion energy-saving technology application in cement plant not only saves electricity expenses (energy saving rate is 30% - 50%), improved product quality, has increased the use of flexibility, stronger adaptability to different craft requirement.
Avoid impact current when the motor first starts, and grid voltage is reduced, can obviously reduce the fan impeller and casing and bearing wear and prolong the service life of maintenance cycle and exchange equipment, save maintenance costs.
Cement plant is a major drain, project day by day of application of frequency converter to expand in recent years. Mainly vertical kiln of roots blower, the disc feeder, to add water into the ball, screw conveyor, crusher, crusher, belt conveyor, and fan, etc. After the application not only saves electricity expenses, and improve the quality of the products, also increased the use of flexibility, stronger adaptability to different craft requirement. So many vertical kiln cement plant has chosen frequency converter for shaft kiln, especially after technical innovation of roots blower, received a very remarkable economic effect, power saving rate can reach 30% 50%, changed the past to adjust export (import) valve opening ways to adjust the production mode of wind pressure or volume, reduce Labour intensity, adjust good timeliness, raised the qualification rate of products, consumption declined obviously, it is a successful example of application of worth to recommend.
Roots blower a constant torque load, the power saving rate is proportional to the droop or N % = delta N %, though different from general fan and water pump power saving rate is higher, but because of its power is larger, but not bad, as long as the furnace wall is continuous 24 hours work, and start the time also is very long. Electricity saving potential, therefore, the high cost of electricity, is worth to promote the use of frequency converter, the advanced technological achievements, short payback period of investment is also about within a year.
Domestic small and medium-sized cities and county cement plant thousands of mostly of shaft kiln cement production, so the market potential is great, if deserve to go up again after cement microcomputer automatic device, but also the good thing of icing on the cake.
About advanced back converter can also use frequency converter, turning speed of variable frequency speed regulation system, furnace tail wind, wind fan, and other auxiliary equipment, etc are effective with frequency converter, a new technology project is beyond reproach.
- three leaves roots blowers zhangqiu yi tai machinery manufacturing co., LTD. Is a professional manufacturer of roots blower ZLSR company. Its main products are roots blower, roots blower, and three leaves roots blowers three-blade roots blower, high pressure blower, ZLSR, three leaves roots blowers ZLSR fan is my company to design, development, production of a highly efficient, energy saving, environmental protection and new products. This wind turbine parts adopt numerical control machining center for processing, and has advanced detection equipment and high-quality personnel, to ensure that each factory equipment and have high quality, high service life. The company to provide you with perfect pre-sales consulting and after-sale tracking service, for every customer to remove trouble back at home, the new and old customers get the praise. My company is located in the east of jinan MingShui, jinan-qingdao road north, 18 kilometers away from jiqing expressway, jiaoji railway traverses MingShui city, traffic is very convenient. Welcome all customers to visit my company guidance, business negotiations. Telephone: 13705411652