AUXILIARY STEAM PRESSURE CONTROLLER FOR SOOT BLOWER

• Main Author: CHIBA AKIHIRO
• Format: Patent
• Language: English
• Published: 27.09.1996
• Edition: 6
• Subjects: BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FLUES; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; HEATING; LIGHTING; MECHANICAL ENGINEERING; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING; REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTIONRESIDUES; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; WEAPONS

PURPOSE: To suppress pressure fluctuation to be generated immediately after starting or stopping a soot blower, and favorably controlling an auxiliary steam pressure to a set pressure value by providing an adder for adding an opening command signal from an opening command integrator to an opening command signal from a proportional integration regulator and outputting the added signals to a pressure regulating valve. CONSTITUTION: In an opening command integrator 14 to which operating signals 16a to 16c are input when when soot blowers 1 are started/stopped for each of units A to C, the opening command signal 10 of a pressure regulating valve 12 meeting an auxiliary steam flow rate required during operations of the soot blowers in the respective units A to C is immediately integrated for all units in operating state and the integrated signal is output as an opening command signal 15. Then, the opening command signal 15 output from the opening command integrator 14 is output through a heater 13 to the pressure regulating valve 12 prior to an actual auxiliary steam pressure. The pressure regulating valve 12 is regulated to such an opening degree as meet an auxiliary steam flow rate required in the unit whose soot blowers 1 are being operated.