Comparison of operating costs of various types of desiccant dryers

There are various types of compressed air adsorption dryers, according to different working methods, there are heatless suction dryers, micro-heat suction dryers, waste heat micro-gas consumption suction dryers, zero-gas consumption suction dryers, etc. Different working methods determine different operating energy costs, we take the exhaust volume of 200m3/min oil-free centrifugal air compressor as an example for a detailed comparison of operating costs.

No heat regeneration dryer energy consumption is all finished compressed air, about 15% of the processed gas volume; (1100KW × 15%) × 24h × 365 days × 1.0 yuan = 1,445,400 yuan / year, annual operating costs: 144.54 (million yuan) / year;

Micro-thermal regeneration dryer single tower cycle 4h, regeneration gas volume 8%, heating power 70KW, heating time 1.5h, blowing cold time 2.0h, (1100KW × 8% × 3.5h + 70KW × 1.5h × 75%) × 6 times × 365 days = 846982 yuan / year, annual operating costs: 84.69 (million yuan) / year;

Waste heat regeneration micro gas consumption dryer single tower cycle 4h, regeneration gas consumption of only 1%, regeneration with gas time (blowing cold) 2.0 h, heating power 110KW, heating time 1.5h, blower power 18KW, start time 1.6h (1100KW × 5% × 1.5h + 110KW × 1.5h × 75% + 18KW × 1.6h) × 6 times × 365 days = 514,759 yuan/year, annual operating cost: 514,700 (million yuan)/year;

Zero gas consumption blower thermal regeneration dryer adsorption cycle 4h, regeneration gas volume 0%, heating time 1.5 h, heating power 110KW, blowing cold time 2.0 h, blower power 18 KW start time 3.5h. (110KW × 1.5h × 75% + 18KW × 3.5h) × 6 times × 365 days = 408982 yuan / year, annual operating costs: 40.89 (million yuan )/year;

Through data analysis, we can learn that if we take no thermal regeneration dryer as the benchmark, the zero air consumption blast thermal regeneration dryer saves more than 70% energy. Such a significant energy saving benefit is worthy of our promotion! Long-term use of zero-air consumption dryer, users can obtain a greater degree of energy saving brought about by the economic significant benefits, and truly for the community to obtain significant energy saving and emission reduction benefits. But it is worth noting that, although the initial investment cost of zero gas consumption is high, but energy consumption calculations of enterprise investment can be recovered in half a year, from a long-term perspective, zero gas consumption suction dryer can be said to be an excellent investment in energy saving.

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