The invention provides a steam-gas mixed medium high-vacuum low-energy-consumption
intelligent control system and a control method. Comprising a
vapor phase precondenser, a
vapor phase precondenser steam extraction opening
pressure sensor, a
vapor phase precondenser cooling water inlet control valve, a vapor phase precondenser cooling water
inlet pressure sensor, a multi-channel efficient steam jet
vacuum pump, a multi-channel efficient steam jet
vacuum pump steam extraction opening
pressure sensor and a multi-channel efficient steam jet
vacuum pump injection steam inlet control valve. The
system comprises a multi-channel efficient steam jet vacuum pump, a steam jet
pressure sensor, a steam phase final cooler, a steam phase final cooler pressure sensor, a steam phase final cooler cooling water inlet control valve, a steam phase final cooler water
inlet pressure sensor, a low-power-consumption auxiliary pump, a low-power-consumption auxiliary pump extraction opening control valve and a
system controller. The system is designed according to the vacuum suction characteristic of a steam-gas mixed medium, the vacuum degree of the system can be remarkably improved, the
energy consumption can be remarkably reduced, and therefore the
heat energy utilization efficiency and the self-control capacity of a front-
end system can be remarkably improved, the production efficiency is improved, the yield is increased, the efficiency is improved, and remarkable
economic benefits are created.