Forced and induced draft fan RB function cold state simulation test method

Abstract

The present invention relates to forced and induced draft fan RB function cold state simulation test method, the method comprises: starting all forced draft fans and induced draft fans normally in a cold state mode where fuel is not put into a boiler, using total air volume to simulate units and boiler load, inputting furnace negative pressure automatic circuit and air supply volume automatic circuit, and optimizing control parameters through furnace negative pressure set value disturbance and air supply volume disturbance tests to meet furnace negative pressure control requirements; stoppingoperation of one induced draft fan, obtaining operating parameters variation of the units and the boiler, and RB function implementation status of the induced draft fans, and verifying accuracy of RBfunction of the induced draft fans; and stopping again operation of an forced draft fan after the induced draft fan is resumed, obtaining operating parameters variation of the units and the boiler andRB function implementation status of the forced draft fans, verifying accuracy of the RB function of the forced draft fans, and completing the cold state simulation test. Compared with the prior art,the method has the advantages of reducing test cost, eliminating thermal test risks, and improving safety of the units.

Description

technical field [0001] The invention relates to the field of automatic control of thermal power generating sets, in particular to a cold-state simulation test method for RB function of a blower and induced draft fan, which is suitable for the blower and induced draft fan of power station boilers. Background technique [0002] Blower and induced draft fan are important auxiliary equipment for power plant boilers. The blower sends air containing oxygen into the furnace through different channels to help pulverized coal and other fuels to achieve full combustion; the induced draft fan is used to suck the flue gas and excess air formed by boiler combustion. Make the furnace form a negative pressure to prevent the flame from escaping and the flue gas from leaking out. Normally, a power plant boiler is equipped with two blowers and two induced draft fans. Once one of the blowers or induced draft fans fails to operate, it cannot maintain the high-load operation of the boiler, which...

AI Technical Summary

Problems solved by technology

[0003] The RB tests of the supply and induced draft fans are generally carried out in the thermal mode of boiler ignition and load operation. Due to the complexity of RB functions, there are many control logics and control parameters involved, and simple loop inspections cannot effectively find existing errors or Defects, it is often necessary to expose the problem through a RB thermal test, and then conduct a second test after perfecting the control function, or even multiple tests before the test can be successful

Carrying out RB function test in hot mode, on the one hand, it needs to consume fuel and increase the cost of the test, on the other hand, there is a risk of test failure, which will cause the boiler and generator set to trip and shut down, which will have an impact on the power grid and power generation equipment, and affect the unit Safety

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