Air compression system and control method

Abstract

The invention provides an air compression system and a control method. The air compression system comprises air compressors, a detection assembly, a valve assembly, a function switching module and a controller. At least one of the air compressors is provided with a frequency converter. The detection assembly is used for detecting the gas parameters in an outlet pipeline. The valve assembly is connected between an air suction valve and an oil-gas separator and used for forming the internal air circulation of the air compressors, lowering the pressure difference of inlets and outlets of the air compressors and reducing the start and unloading torque. The function switching module is used for changing the electric drive mode of the air compressors so that the air compressors can be switched between the power frequency and the variable frequency. The controller is used for calculating and adjusting the output frequency of the frequency converters according to the detected parameter changes for adjusting gas supply. The system solves the pressure of the maximum efficiency within the required pressure range and assigns the value to a PID so as to control the air compressors to act; when the air compressors operate, the loading and unloading pressure value is set, and the start and stop of the frequency converters are controlled; and the dew point temperature is calculated, a drying machine is started and stopped automatically, the optimum operation of energy efficiency is achieved, the work efficiency is improved, and the operation cost is lowered.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a compressed air system and a control method. Background technique [0002] Compressed air is an indispensable power source in the field of industrial production. Due to different production demands, existing factories are equipped with air compressor units and supporting facilities corresponding to the gas production. Compressed air system is the main power source of energy consumption in the production field. one. Air compressors need to consume a lot of electricity when producing compressed air. Taking the common production of 100PsiG (7Kg / cm3G) compressed air system as an example, an air compressor with a suction capacity of 100ICFM needs to consume about 20HP of electricity for one hour. Air compression The energy utilization rate of the machine is very low, only about 20.8%. The working mode of most air compressor stations is: set the loading and unloading pressure (or there is...

AI Technical Summary

Problems solved by technology

If a high air supply pressure is set for safe air supply, the pressure loss from the air compressor air supply pipeline to the dryer outlet main pipe section will continue to increase, increasing the energy consumption of the air compressor air supply pressure

This kind of air compressor station operation management method has a large waste of energy. How to use compressed air reasonably and how to improve the working efficiency of the air compressor can not only meet the needs of process production, but also dynamically adjust various parameters. The air compressor station is always Running in the state of the highest energy efficiency has become a key technical issue that needs to be solved in the air compressor industry

[0003] At the same time, the existing computer management system for air compressor station equipment only realizes automatic remote start-stop and status monitoring of the equipment. The original pre-set management program starts and stops the air compressor unit in turns, and it is not possible to calculate the air load to select which air compressor unit is most suitable for start-stop operation, nor can it calculate the real-time calculation of each air compressor. Working efficiency or input power ratio kW / (m 3 .min -1 ) and statistics show the energy consumption of the air compressor

Images