System and method for improving RB working condition of induced draft fans of two-boiler one-machine thermal power generating unit
A technology of thermal power units and induced draft fans, which is applied in the directions of induced air, combustion methods, and air supply adjustment, which can solve problems such as secondary air volume reduction, coal powder retention, and severe fluctuations in furnace negative pressure, so as to reduce the probability of equipment damage, The effect of delaying the process of withdrawing from the furnace and shortening the process time
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[0041] like figure 1 As shown, in the first-lead fan 4 fault trip, trigger two furnace one-machine unit introduction wind turbine RB, RB trigger the front unit running at 100% rated load, the other three air blowers are normal, describing this suppression system in two The role of the furnace one-machine thermal electromechanical set of air machine RB.
[0042]In the first lead fan 4 fault trip, the two furnace one machine group introducer RB triggered, the second boiler 11 does not need to trip one air blower at the same time, and does not trigger the wind turbine RB working with the first boiler 1, in the first After the introduction fan 4 trips, the first valve 4 is closed while the first valve 4 input is closed, and the electric regulating valve 9 on the connecting pipe 18 between the first lead wind tube 10 and the second lead air tube 17 Directly driven to 80% (reserve a certain adjustment means), and adjust the remaining three air blowers of the two boilers...
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