发明名称 |
CALCULATING SULPHITE DIGESTER RATE OF DELIGNIFICATION |
摘要 |
To determine the degree of cooking in a sulphite digester used for delignification, the digester temperature (T) and pressure (Pd) are sensed (12, 15) and utilised in a unit comprising a plurality of function blocks to calculate the digester reaction rate (k) according to the Arrhenius equation. This output is multiplied by a value proportional to the partial pressure (p SO2) of sulphur dioxide in the digester to obtain a delignification rate value. The delignification rate value is integrated over time to determine the degree of cooking or Kappa Number. This number is compared to a desired set point value for the Kappa Number. When the actual Kappa number reaches the desired set point, a signal is produced which is provided to an operator. Function blocks spread over two controller modules are utilised to achieve the needed calculations in a simple manner without the use of an analog or digital computer. |
申请公布号 |
AU2149983(A) |
申请公布日期 |
1984.05.31 |
申请号 |
AU19830021499 |
申请日期 |
1983.11.18 |
申请人 |
BABCOCK + WILCOX CO., THE |
发明人 |
RALPH K. JOHNSON;AZMI KAYA;MARION A. KEYES |
分类号 |
G01N31/00;D21C3/04;D21C3/06;D21C3/22 |
主分类号 |
G01N31/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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