The author explains as follows based on his experiences on developments of DDC, solid gas two phase injection processes, pulverized coal injection system into blast furnaces, coke and oxygen injection into calcium carbide electric furnace, high pressure gasifier and moved bed gravity flow injection system etc.
For the coal gasifier, a boardless instrumentation is needed for quick responce of improvement of control against improvement of the process, an inflexible control board (ICB) is needed for labour saving of the improvement of instrumentation and a brain saved software package is needed for the control CAD on a multi variable control system of the multi variable process.
He also expresses a mass flow meter using high frequency noise sensor without sensing hole developed by him is required for high pressure high temperature injection into coal gasifier based on moved bed gravity flow injection process.
