Air compressor is one of the general equipment in manufacturing industry. It is necessary for enterprises to do a good job in energy-saving management of air compressor. In order to increase production cost, it is urgent for enterprises to install high efficiency air compressors. So how to save energy for air compressor? This paper summarizes eight common ways of saving energy for air compressor, hoping to help energy-consuming enterprises achieve the goal of saving electricity and reducing consumption.

For the air compressors that have been listed in the national elimination catalogue of high energy consumption equipment and have low energy efficiency, it is necessary to consider the overall renewal of new air compressors with high energy efficiency.

1, governance leaks.

According to the calculation, a 1 mm2 orifice leaks about 1.5 L/S under 7 bar pressure. Check all pipeline networks and gas points, especially joints and valves, and deal with leakage points in time.

2, pressure drop governance.

Pressure gauges are set up to measure pressure through pipeline sections, and pressure drop of each section is checked in detail, and the troubled pipeline sections are checked and maintained in time. General air compressor outlet to the gas point, pressure drop can not exceed 1 bar, strict or even no more than 10% that is 0.7 bar, cold-dry filter section pressure drop is generally 0.2 bar. Factory layout as far as possible annular pipe network, balance each point with air pressure.

3, adjust the pressure matching of gas equipment.

Evaluate the pressure requirements of the gas equipment, and minimize the exhaust pressure of the air compressor when the production is guaranteed. The exhaust pressure of the air compressor decreases by 1bar and the energy saving is about 7~10%.

4, adjust irrational use of gas behavior.

According to authoritative data, the energy utilization rate of air compressor is only about 10%. About 90% of air compressor is converted to heat energy loss. It is necessary to evaluate the pneumatic equipment for factory use and whether it can be solved by electric method. At the same time, we must resolutely put an end to the routine cleaning work with compressed air.

5, adopt centralized control mode.

If the number of air compressors is small, one variable frequency air compressor can be used to regulate the pressure. If the number is large, centralized linkage control can be used to avoid the stepped exhaust pressure rise caused by the parameter setting of multiple air compressors.

6, do a good job in equipment maintenance and cleaning.

Increase the heat dissipation effect of the air compressor, the exchange effect of the heat exchanger such as water cooling and air cooling, and maintain the oil quality.

7, the waste heat recovery of air compressor.

Recovery of air compressor oil is used to prepare hot water for other processes or auxiliary living facilities.

8. Modification of drying system.

The new drying equipment uses air pressure air residual heat to dry and dehydrate compressed air, and the energy saving rate exceeds 80%.