The invention relates to release gating and exception isolation control in a
solvent recycling process. The
system collects at least two online parameters of the pretreatment section, the membrane separation / contact section and the
discharge section, and calculates SPC / EWMA and other
memory type statistics; and meanwhile, setting two-level thresholds of a process threshold and a release threshold for each upper limit type index and each
lower limit type index. And when any one index exceeds a process threshold or the
memory type statistic exceeds a control limit, the driving valve group is switched to a small tank buffer
backflow branch connected with a discharging device in parallel, CIP cleaning is started in an
interlocking manner, and a release port is locked. After it is confirmed through retesting that all the indexes meet the release threshold and the
memory type statistic returns to the control limit and is kept for a preset time, locking is relieved, release is recovered, and meanwhile a release
record with a
timestamp and batch tracing data are generated. And after cleaning and resetting, a plurality of subsequent batches are set as observation batches, and a tightened control limit is adopted for judgment. The invention further provides a control device for executing the method and a computer readable storage medium.