Air compressor is used to increase the pressure of gas to facilitate the delivery and increase the pressure of gas to meet the production process or power equipment needs of a special machine. In manufacturing industries such as ceramics, glass, toys, garments, machinery and plastics, most of them need to use air compressors of 10 m 3 / min or more and even need to operate multiple units in order to meet their production needs. Practice has proved that, select, make good use of compressor units, users will be able to save energy, reduce operating costs and increase efficiency. Compressor system and pipe network from the test data shows that there are many ways to improve the compressor power utilization, there are several: 1, the correct choice of compressor If you want to create a new compressor system or the old compressor must be updated Note that select the appropriate compressor model, should choose the advanced energy-saving compressor, and its performance indicators to meet the requirements. The principle of selection is as follows: (1) Understand the performance of the compressor products, the use of the scope of the main parameters and requirements of the operating conditions to see if it can meet the requirements of the working conditions. (2) To ensure safe and reliable operation under the conditions required by the production process, selection should be based on the operating conditions of the regular operation, and should not be based on the selection of the maximum operating conditions. (3) Companion accessories such as bumpers, gas cooler, oil separator, etc., should be matched with the host and meet the requirements of the process. (4) To consider the energy-saving benefit, the investment recovery period is as follows: Payback period = p1-p0 / p2 <1 / 2-2 / 3 Compressor life cycle p1- - The old compressor discarded after the recovery of the cost of conversion p2-year value-for-profit conversion 2, to improve compressor operating conditions Attention to improve compressor operating conditions, rational arrangement of pipes, minimize drag losses, and enhance maintenance and gas management. (1) to improve the inspiratory conditions. The first intake pipe design should have sufficient cross-sectional area (for air, the flow rate does not exceed 10-12 m / s), the pipe should be as short as possible, and should not have sharp turns, there should be no shrinkage and redundant accessories; Second is to reduce the intake air temperature can increase the actual compressor intake, but also reduce the specific power consumption of the compressor. Compressor suction outlet should be located in the outdoor shade, if necessary, take a shower to cool the way; In addition, the piston machine, the choice of high thermal conductivity, easy to clean cooler, the cooler to be cleaned regularly. Practice shows that each reduction of intake air temperature of 3 degrees, after a reduction of about 1% power consumption. (2) reduce the pressure loss of the pipeline. When designing or installing pipelines, pipe lengths should be shortened as much as possible to reduce unnecessary pipe fittings such as tees, elbows, valves, etc., to reduce pipe bends or to use elbows with a smaller radius of curvature. Pipeline filter should be small and easy to exclude dirt, pipe cross-sectional size should be so that the air flow rate is not too much, if the air flow Qm3 / min, the diameter of D> 20√Q mm. General air does not exceed 8-10 m / s. In addition, to reduce gas leakage loss. Compressor at all levels and the formation of pressure difference between the outside world, may be through piston rings, valves, packing leaks and other less stringent, resulting in the loss of displacement, resulting in increased power consumption. 3, to strengthen the management of gas, the rational use of compressed air compressor stations to implement gas production and gas management, gas stations to be installed on the gas meter, gas and gas statistics on a timely manner, and to develop indicators of assessment. Reasonable use of compressed air, reducing gas consumption, can be considered from the following four aspects: (1) the whole gas pressure. At present, there are many factories in the exhaust pressure and the production process does not meet the problem, often exhaust pressure is higher than the actual pressure needs to be adjusted. Test shows that: the compressor at full load, the exhaust pressure is reduced 0.1MPa, the motor input power can be reduced 5-8%. (2) Change the continuous air supply to intermittent air supply. Some companies do not match the gas supply and gas consumption, continuous operation of the compressor and the process intermittent gas, the compressor often idling or emptying, waste of electricity. In this case, the compressor can be shut off regularly according to the need of gas or a large gas tank can be set up. (3) Reasonably arrange compressor operation. In the case of several compressors working in parallel, a diagram of the economic operation of the compressor station should be made in order to minimize power consumption. The power consumption characteristics of compressors running alone or in parallel should be determined by testing or statistics. The most economical combination of compressors should be specified to operate for the longest time, while the least efficient compressors should be used only for load regulation purposes. According to the different gas pressure, choose different exhaust pressure combination, so that the best use of equipment to improve the operating efficiency. (4) increase the load factor of the compressor. As the selected compressor rated displacement and gas consumption does not match, resulting in a low motor load, you can consider using the governor to adjust.