RALPH JOHNSON, L.S.W.
Social Work in Cleveland, OH

4990219, Feb 5, 1991

Nov 1, 1989

7/430854

Jeffrey A. Beller - Willoughby OH
Ralph K. Johnson - Highland Heights OH
Roger Kammerer - Mercer Island WA
Azmi Kaya - Akron OH
Marion A. Keyes - Chagrin Falls OH

Elsag International B.V. - Amsterdam

D21C 712

162238

A method and apparatus for controlling the delignification process by monitoring and minimizing variations in the Kappa Number and the digester residual chemical concentration. A parameter representative of the H factor for the delignification process and a measurement of the initial chemical concentration are utilized to produce signals representative of the actual Kappa Number and the residual acid concentration in the digester. The expected perturbations in Kappa Number and the residue chemical concentration are compared with target values for same to produce estimated errors due to mismatch which are compared with actual measured errors for these parameters to produce compensated control errors for same. The compensated control errors are utilized to modify the target values for the H factor and the initial chemical concentration by modifying the chemical charge and the time versus temperature operating parameters of the digestings to regulate pulp Kappa number and spent cooking liquor residual chemical concentrations of the process.

5032977, Jul 16, 1991

Dec 7, 1989

7/430855

Jeffrey A. Beller - Willoughby OH
Ralph K. Johnson - Highland Heights OH
Roger Kammerer - Mercer Island WA
Azmi Kaya - Akron OH
Marion A. Keyes - Chagrin Fall OH

Elsag International B.V. - Amsterdam

G06F 1546, D21C 712

364165

A method and apparatus for controlling the delignification process by monitoring and minimizing variations in the Kappa Number and the digester residual chemical concentration. A parameter representative of the H factor for the delignification process and a measurement of the initial chemical concentration are utilized ot produce signals representative of the actual Kappa Number and the residual acid concentration in the digerter. The expected perturbations in Kappa Number and the residual chemical concentration are compared with target values for same to produce estimated errors due to mismatch which are compared with actual measured errors for these parameters to produce compensated control errors for same. The compensated control errors are utilized to modify the target values for the H factor and the initial chemical concentation by modifiying the chemical charge and the time versus temperature operating parameters of the digestings to regulate pulp Kappa number and spent cooking liquor residual chemical concentrations of the process.

5032976, Jul 16, 1991

Dec 7, 1989

7/430847

Jeffrey A. Beller - Willoughby OH
Ralph K. Johnson - Highland Heights OH
Roger Kammerer - Mercer Island WA
Azmi Kaya - Akron OH
Marion A. Keyes - Chagrin Falls OH

Elsag International B.V. - Amsterdam

G06F 1546, D21C 712

364151

A method and apparatus for controlling the delignification process by monitoring and minimizing variations in the Kappa Number and the digester residual chemical concentration. A parameter representative of the H factor for the delignification process and a measurement of the initial chemical concentration are utilized to produce signals representative of the actual Kappa Number and the residual acid concentration in the digester. The expected perturbations in Kappa Number and the residual chemical concentration are compared with target values for same to produce estimated errors due to mismatch which are compared with actual measured errors for these parameters to produce compensated control errors for same. The compensated control errors are utilized to modify the target values for the H factor and the initial chemical concentration by modifying the chemical charge and the time versus temperature operating parameters of the digestings to regulate pulp Kappa number and spent cooking liquor residual chemical concentrations of the process.

5060132, Oct 22, 1991

Dec 7, 1989

7/430532

Jeffrey A. Beller - Willoughby OH
Ralph K. Johnson - Highland Heights OH
Roger Kammerer - Mercer Island WA
Azmi Kaya - Akron OH
Marion A. Keyes - Chagrin Falls OH

Elsag International B.V. - Amsterdam

D12C 712

364158

A method and apparatus for controlling the delignification process by monitoring and minimizing variations in the Kappa Number and the digester residual chemical concentration. A parameter representative of the H factor for the delignification process and a measurement of the initial chemical concentration are utilized to produce signals representative of the actual Kappa Number and the residual acid concentration in the digester. The expected perturbations in Kappa Number and the residual chemical concentration are compared with target values for same to produce estimated errors due to mismatch which are compared with actual measured errors for these parameters to produce compensated control errors for same. The compensated control errors are utilized to modify the target values for the H factor and the initial chemical concentration by modifying the chemical charge and the time versus temperature operating parameters of the digestings to regulate pulp Kappa number and spent cooking liquor residual chemical concentrations of the process.

4978425, Dec 18, 1990

Jun 13, 1989

7/365350

Jeffrey A. Beller - Willoughby OH
Ralph K. Johnson - Highland Heights OH
Roger Kammerer - Mercer Island WA
Azmi Kaya - Akron OH
Marion A. Keyes - Chagrin Falls OH

Elsag International B.V.

D21C 712

162 49

A method and apparatus for controlling the delignification process by monitoring and minimizing variations in the Kappa Number and the digester residual chemical concentration. A parameter representative of the H factor for the delignification process and a measurement of the initial chemical concentration are utilized to produce signals representative of the actual Kappa Number and the residual acid concentration in the digester. The expected perturbations in Kappa Number and the residual chemical concentration are compared with target values for same to produce estimated errors due to mismatch which are compared with actual measured errors for these parameters to produce compensated control errors for same. The compensated control errors are utilized to modify the target values for the H factor and the initial chemical concentration by modifying the chemical charge and the time versus temperature operating parameters of the digestings to regulate pulp Kappa number and spent cooking liquor residual chemical concentrations of the process.

4685072, Aug 4, 1987

Jan 2, 1985

6/688213

Ralph K. Johnson - Highland Heights OH
Azmi Kaya - Akron OH
Marion A. Keyes - Chagrin Falls OH
William H. Moss - Kingwood TX

The Babcock & Wilcox Company - New Orleans LA

G06F 1546, G06F 1536, F23N 518

364551

A system for the automatic and continuous determination of the efficiency of a fossil fuel-fired vapor generator for utilization by an automatic load control (88) to control the distribution of the system load among a plurality of generators, wherein various heat losses from various combustion sources are separately determined, the individual losses summed (80) and subtracted (86) from 100 percent to obtain a measure of the vapor generator efficiency.