Under the background of full liberalization in 2023, the offline exhibition ushered in a long-lost crowd. The 11th China (Shanghai) International Fluid Machinery Exhibition, sponsored by China General Machinery Industry Association, was held as scheduled from March 7th to 10th. As the largest and most professional exhibition in the domestic fluid industry, more than 500 advanced fluid enterprises participated in the exhibition, showing their elegance. Compressor activity, sharing the theme “Low Dew Point Energy Saving Technology for First-class Energy Efficiency Air Compressor Station”
The “first-class energy-efficient compressed air station” came into being under the general trend from energy saving of air compressor to energy saving of compressed air system, which is a hot spot in the industry in recent years and has gradually gained popular support and industry consensus. The technology related to the “first-class energy-efficient compressed air station” is a hot research direction of industry enterprises, and various enterprises have invested a lot of R&D resources to gallop and compete bravely on this new track. In the earlier energy-saving projects of compressed air system, compressed air post-processing equipment was not paid much attention, mainly focusing on the energy-saving of air compressor itself.
Is “compression heat” hot enough? In the ideal state, the suction temperature of the last stage of the centrifuge is 38C, 3bar is taken as an example, and the outlet is 6.9bar, so the pressure dew point is about 50C, the temperature is about 110C, and the relative humidity is about 8.6%, which is a very high relative humidity for regeneration. For example, the temperature of finished gas is 35C, and the relative humidity of pressure dew point -10C is about 4.6%. Leaving aside the influence of temperature on kb constant and the improvement of equilibrium adsorption capacity by blowing cold gas, it is unrealistic to use high humidity to desorb low humidity (which can be converted into equilibrium adsorption capacity). That is to say, if the pressure dew point is -20 and below.
In recent years, with the in-depth understanding and research on the energy saving of compressed air system, and the energy saving space of air compressor itself is gradually shrinking, everyone’s eyes began to turn to the comprehensive energy consumption reduction of compressed air aftertreatment equipment, which prompted some aftertreatment equipment manufacturers with R&D ability and keen market sense to keep pace with the times, actively develop and innovate, and gradually emerge in this new track.
This special lecture analyzes the efficient utilization of “compression heat” in compressed air drying equipment, such as split-flow design technology, which is the main research and application direction of reducing comprehensive energy consumption of compressed air drying equipment at present. Supported by a large number of detailed practical data, this technology sharing speech was brilliant and won unanimous praise from the participants.