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 Where: t 1 , t 2 , and t 3 are the temperature before the wastewater is heated, the temperature after the wastewater is heated, and the vapor temperature, and the unit is °C .
 Cp1 and Cp2 are the heat capacity of waste liquid and the heat capacity of steam condensate , respectively, in kJ / kg· °C .
 ΔH : heat of vaporization of water kJ/kg .
 According to the above formula, the steam consumption of wastewater is generally 40 ~ 60kg /m 3 , excessive heating is not economically worth the candle. The recovery of cyanide is not linear with temperature.
 3 . 5  Power consumption
  According to the current status of acidification recovery technology in China, the power consumption has the following aspects:
  1) Wastewater pump power consumption (secondary): 0.5kw/m 3
  2) The power consumption of the blow-off fan is 1.5kw/m 3
  3) Alkaline circulation pump power consumption 0.5kw / m 3
  4) Exhaust fan power consumption 0.5kw/m 3
  5) Acid pump and acid addition system 0.26kw/m 3
  Total approximately: 3.25kw/m 3
 This is the power consumption when the cyanide in the wastewater is reduced to about 50 mg/L . If a lower residual cyanide concentration is pursued, the power consumption is multiplied.
 Where: t 1 , t 2 , and t 3 are the temperature before the wastewater is heated, the temperature after the wastewater is heated, and the vapor temperature, and the unit is °C .
 Cp1 and Cp2 are the heat capacity of waste liquid and the heat capacity of steam condensate , respectively, in kJ / kg· °C .
 ΔH : heat of vaporization of water kJ/kg .
 According to the above formula, the steam consumption of wastewater is generally 40 ~
 3 . 5  Power consumption
  According to the current status of acidification recovery technology in China, the power consumption has the following aspects:
  1) Wastewater pump power consumption (secondary): 0.5kw/m 3
  2) The power consumption of the blow-off fan is 1.5kw/m 3
  3) Alkaline circulation pump power consumption 0.5kw / m 3
  4) Exhaust fan power consumption 0.5kw/m 3
  5) Acid pump and acid addition system 0.26kw/m 3
  Total approximately: 3.25kw/m 3
 This is the power consumption when the cyanide in the wastewater is reduced to about 50 mg/L . If a lower residual cyanide concentration is pursued, the power consumption is multiplied.
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