Example of Roots Blower in Roots Blower Factory Home Appliance Factory [Purchase Tel.: 0531-83663588]
The project is located in Anhui Huainan Power Plant
Roots blower is mainly used for desulfurization of power plant. In the process of pneumatic transmission in the power plant, because Roots blower will corrode the fan when exposed to corrosive gases such as sulfuric acid, it is necessary to make anti-corrosion for all components, which requires a more stringent process.
The project of the power plant adopts anti-corrosion parts, with stable gas supply and small flow change. The special curve meshing of the impeller is more reasonable, with small leakage, high efficiency and low energy consumption. It is a new energy-saving product.
Roots blower body for power plant does not need forced heat dissipation, and the motor has its own fan blades for heat dissipation. As long as the motor has its own sleeve, the temperature at the bearing position will not exceed the safe operation requirements of the motor. In order to reduce noise, enterprises usually use sound insulation cover for Roots blower used in power plants.
According to the data, more than half of the boiler fans with the operating efficiency of more than 50 MW units in China are less than 70%, and about 1/5 of them are less than 50%. More than 66% of the machines using Roots blowers consume serious energy during operation, so it is necessary to carry out energy-saving technical transformation. The existence of a large number of roots blowers with serious energy consumption means that the transformation of roots blowers has great energy saving potential.
The person in charge of Anhui Huainan Power Plant said: Now Roots blower for power plant Energy consumption is too serious. How can we save energy and reduce emissions? Factory technicians analyze the causes of serious energy consumption
Under the condition of insufficient scientific research in the early stage, the production process of Roots blower used in the power plant is backward, resulting in large linear error. The model of Roots blower in power plants in China adopts the wood mold integral casting process. The blades of centrifugal Roots blower with medium and high specific speed are twisted, so it is difficult to lift the mold and there are large errors in the modeling, As a result, the actual effect of Roots blower is seriously lower than the experimental effect, which is also one of the reasons for serious energy consumption of Roots blower.
The energy-saving transformation method we give
① Scientific and reasonable selection
Try to select roots blowers produced by regular manufacturers, and comprehensively evaluate the performance of roots blowers. The driving and regulating modes of roots blowers should be selected according to the specific conditions; The prime mover with small margin should be selected to keep the prime mover within the range of rated power for a long time and improve the overall operating efficiency of the unit. The working parameters and margins of Roots blower shall be selected correctly to ensure that the parameters and margins can meet the maximum demand of the system and prevent the capacity from exceeding the range and affecting the operating efficiency.
② Improve regulation mode
Roots Blower The adjustment of shall vary with the load of the host group. If the adjustment change of Roots blower is inconsistent with the load change of the main unit, it will cause huge energy waste, which is also the main source of waste. All must adopt economical and effective flow regulation mode; The adjustment mode of Roots blower shall be based on specific conditions, and the safety and two principles shall be adhered to. On the premise of confirming that roots blower meets the work demand, the zui low scheme of investment cost, power consumption cost and maintenance and management cost is obtained through scientific analysis. This scheme is the appropriate adjustment mode of roots blower zui. ③ Use Roots blower frequency converter
The old power consumption equipment shall be eliminated and new energy-saving equipment shall be replaced, so as to increase the operating cost of the power plant in the long run, and the original roots blower and regulating device shall be modified or replaced. The power plant can transform the impeller, volute and other circulation parts of Roots blower or transform the prime mover with frequency conversion according to its technical strength; The regulating device can be changed into an axial deflector, which not only reduces the investment cost, but also has a good power saving effect; The circulating water pump has a constant speed, and the motor is replaced by a more flexible two speed motor, which can save electricity.
④ Perfection rate Roots blower
First of all, roots blower has high efficiency when it operates under design conditions and nearby. Improper selection of roots blower, changes in output of turbine and boiler, and changes in pipeline resistance will lead to too large or too small capacity of roots blower, which will lead to insufficient capacity of roots blower in this case. Therefore, it is necessary to take appropriate and necessary transformation for Roots blower to improve its operation efficiency;
Secondly, improve the pipeline system. The operating efficiency of roots blower is not only related to its own performance, but also related to the flow performance of the device system. The pipeline system performance shall meet the performance of Roots blower. Unreasonable design of pipeline system and problems such as rust, ash scale blockage and leakage are easy to occur after the pipeline system runs. Therefore, when improving the pipeline system, it is necessary to reduce the loss caused by the resistance of the water pipeline, make the flow and distribution of gas and liquid even, and pay attention to the sealing of the pipeline system to prevent leakage.
⑤ Do a good job in installation and maintenance of roots blower
1. There is a reasonable clearance between the moving and static parts of Roots blower and the center position of the rotor
When the clearance increases, it will increase the leakage of the fluid from the high-pressure side to the low-pressure side, and reduce the volumetric efficiency of the roots blower. Therefore, under the premise of ensuring the safe operation of the roots blower, the clearance between the dynamic and static parts of the roots blower should be minimized.
2. Ensure the smoothness of blades and flow channels
The flow loss of fluid is not only related to the shape of flow channel, but also the smoothness of blade and flow channel will affect the flow resistance loss of fluid. Relevant experiments have proved that by painting the inner wall of the pump body to increase the smoothness, the friction resistance loss of the disc is well reduced, and the working efficiency of the pump can be improved by 3%; After polishing the rough parts in the pump and impeller, the working efficiency of the pump is improved by about 11%.
3. Maintain and repair the flow channel profile of Roots blower
After the roots blower is used, the original profile of the flow channel is often changed due to ash scale, wear and cavitation, which increases the roughness of the wall surface, which will weaken the performance of the roots blower and reduce the working efficiency. Therefore, the profile of the runner should be cleaned and repaired in time.
Through the above technical scheme of the power plant for the energy-saving technical transformation of Roots blower, we know that there are various transformation schemes. The power plant needs to carry out detailed analysis and research on its own specific situation, and use scientific calculation to obtain the best energy-saving scheme, so as to achieve the energy-saving effect and improve the efficiency of the power plant in practical sense.
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