Permanent magnet variable frequency screw compressors can maintain high output efficiency at low rotate speed. The greater the fluctuation of air volume in the system, the more obvious energy saving effect is. LGM series permanent magnet frequency conversion screw air compressors adopt permanent magnet (IPM) motor with huge energy saving efficiency and superior performance. When used with dedicated servo drivers together, they will give full play to the incomparably energy-saving effect than general induction motors. According to the exhaust temperature, cooling fan with variable frequency control can control the fan rotate speed to prevent power waste, reduce noise and stabilize the system. Through wide range control, the maximum amount of air displacement is increased by about 16%.
Permanent Magent VSD Screw Air Compreessor Permanent Magent Vsd Screw Air Compreessor,Pm Vsd Screw Air Compressor,Vsd Oil Cooled Rotary Screw Air Compressor,Vsd Variable Screw Air Compressor Quzhou Able Machinery Equipment CO., LTD. , https://www.ablejx.com
It is understood that this equipment is the key equipment for the 200,000-ton/year synthetic ammonia plant in Sichuan Meishan Jinxiang Chemical Co., Ltd. It has a diameter of 2.4 meters, a length of 22.72 meters and a weight of 55 tons. It combines three units of No. 1 ammonia cooling, No. 2 ammonia cooling and cold exchanger, which saves investment, saves space, and saves water and energy.
According to reports, the structure of the device is complex, with many tube plates, and the concentricity, parallelism and verticality are all very high. The parallelism between the center line of the tube plate and the axis of the equipment and the deviation of the perpendicularity between the end face of the tube plate and the axis of the equipment are required. ≤ 1 mm, not easy to control. In addition, the device has five tube plates with a total length of 15.31 meters, and each tube plate has 267 holes. The concentricity and parallelism of tube tubes and tube plates must be accurate to ≤ 1 mm, which is very difficult to manufacture. The tight fit of the pipe and the pipe hole not only requires high processing precision, but also the smoothness of more than 200 pipes is required to reach the brightness of the stainless steel, and the design and manufacturing have a very high degree of difficulty. As a result, the equipment has not been domesticated for a long time.
The first five-tube plate combination ammonia cooler was successfully developed
The first five-tube-plate combination ammonia cooler designed and developed by China itself was recently installed and shipped by Sichuan Bluestar Machinery Co., Ltd. This indicates that the long-term dependence on imports of the equipment has been broken, and has filled the domestic gap.