Energy saving


5t/hr triple effect evaporator

Equipment cost: 800000 yuan/set, with an annual depreciation cost of 80000 yuan (calculated over 10 years).

Operating costs: Steam consumption of 0.45t/ton of water, steam price of 220 yuan/ton, electricity consumption of 50 kilowatts/hour (circulating water pump, vacuum pump), average electricity price of 0.6 yuan/kilowatt hour, circulating water of 110 tons/hour, circulating water of 0.3 yuan/ton;

Hourly operating cost: 5 tons of evaporation * 0.45 tons of steam/ton of water * 220 yuan/ton of steam+50 kW * 0.6 yuan/kWh+110 * 0.3 yuan/ton=495 yuan+30 yuan+33 yuan=558 yuan/hour;

Daily operating cost (24 hours/day): 558 yuan/hour * 24 hours=13392 yuan/day;

The annual operating cost (300 days/year) is 13392 yuan/day * 300 days/year=4017600 yuan/year.

Annual total cost: 402+10=4.12 million yuan/year.

5t/hr mechanical steam recompression (steam temperature rise of 8 ℃) evaporator

Equipment cost: 2.5 million yuan per set, with an annual depreciation cost (calculated over 10 years) of 250000 yuan.

Operating cost: Steam consumption of 0.02 tons/hour (preheating feed), steam price of 220 yuan/ton, electricity consumption of 170 kW/hour (main motor, circulating pump, vacuum pump, condensate pump), average electricity price of 0.6 yuan/kWh, circulating water of 25 tons/hour, circulating water of 0.3 yuan/ton;

Hourly operating cost: 0.02 tons * 220 yuan/ton+170 kW * 0.6 yuan/kWh+25 * 0.3 yuan/ton=4.4+102+7.5=113.9 yuan/hour;

Daily operating cost (24 hours/day): 113.9 yuan * 24 hours=2733.6 yuan/day;

The annual operating cost (300 days/year) is 2733.6 yuan * 300 days=820080 yuan/year.

Annual total cost: 82+25=1.07 million yuan/year.

Compared with the three effect evaporator, the annual cost savings are 412-107=3.05 million yuan/year.

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