Title:
連続蒸煮方法
Document Type and Number:
Japanese Patent JP4681893
Kind Code:
B2
Abstract:
A procedure for the continuous cooking of chemical pulp, comprising an impregnation vessel 101 and a digester 102. The chips are impregnated in the impregnation vessel 101 and are fed after impregnation together with circulation fluid through a transfer line 103 to a top separator 105 on the digester 102 in order to be cooked. A fraction of the circulation fluid is withdrawn at a top separator 105 and returned to the bottom of the impregnation vessel 101 via a return line 106. Black liquor is withdrawn from the digester via a black liquor line 108 to the impregnation vessel 101. The invention is characterised in that a heat exchanger 107 is arranged between the return line 106 and the black liquor line 108. The heat exchanger 107 allows the exchange of heat between the two lines, but does not allow the exchange of fluid. The temperature of the black liquor in the black liquor line 108 after passing through the heat exchanger 107 has been cooled by 10-15 DEG C.
Inventors:
Sneckens, Vidal
Gustavson, Rennaruto
Ceteracen, Jonas
Gustavson, Rennaruto
Ceteracen, Jonas
Application Number:
JP2005019536A
Publication Date:
May 11, 2011
Filing Date:
January 27, 2005
Export Citation:
Assignee:
Metso Fiber Karlstad Activolag
International Classes:
D21C7/14; D21C3/24; D21C3/02
Domestic Patent References:
| JP5503739A | ||||
| JP2005515320A | ||||
| JP2216289A | ||||
| JP10506687A | ||||
| JP9504842A | ||||
| JP8511583A | ||||
| JP6510091A | ||||
| JP5132882A |
Foreign References:
| WO1997029236A1 | ||||
| US6203662 | ||||
| WO1998035090A1 |
Attorney, Agent or Firm:
Takao Hamano
Teruichi Hirai
Teruichi Hirai