Cold-state simulation test method for rb function of blower and induced draft fan

Abstract

The invention relates to a cold-state simulation test method for the RB function of the blower and induced draft fan. The method includes: in the cold state of the boiler without fuel input, start all the blowers and induced draft fans normally, use the total air volume to simulate the load of the unit and the boiler, and put them into the furnace Negative pressure automatic circuit and air supply automatic circuit, optimize the control parameters through the furnace negative pressure set value disturbance and air supply disturbance test to meet the furnace negative pressure control requirements; stop one induced draft fan, and obtain the unit and boiler operating parameter changes To verify the accuracy of the RB function of the induced draft fan, and to verify the accuracy of the RB function of the induced draft fan; to stop a blower fan after the fan resumes operation, to obtain the changes in the operating parameters of the unit and the boiler and the realization of the RB function of the blower fan, and to verify the accuracy of the RB function of the blower fan To complete the cold simulation test. Compared with the prior art, the invention has the advantages of reducing the test cost, eliminating the risk of hot state test, improving the safety of the unit and the like.

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 draft fan, which is suitable for a draft fan regulated by moving blades. 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 triggers a rapid load reduction of th...

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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