Film-falling crystallization and evaporation process of pulping black liquor

Film-falling crystallization and evaporation process of pulping black liquor

CN
  • CN 101,629,393 B
  • Filed: 08/20/2009
  • Issued: 01/09/2013
  • Est. Priority Date: 08/20/2009
  • Status: Active Grant
First Claim
Patent Images

1. the film-falling crystallization and evaporation process of black liquor of pulp making, it is characterized in that:

  • comprise the steps;

    at first black liquor of pulp making to be transported in the II single-effect evaporator (1), black liquor of pulp making in II single-effect evaporator (1) reaches 50%---when namely reaching the crystallization critical point, the black liquor of pulp making of a part will be transported in the black liquor of pulp making flash tank (2), black liquor of pulp making is lowered temperature in black liquor of pulp making flash tank (2), its temperature is reached below the normal boiling point, then be transported in the black liquor of pulp making mixing channel (3), to the middle sode ash that adds of black liquor of pulp making mixing channel (3) it is mixed with black liquor of pulp making, to be transported in the II single-effect evaporator (1) with the mixed black liquor of pulp making of sode ash again, and then black liquor of pulp making in the II single-effect evaporator (1) will be transported in the I single-effect evaporator (4).

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