Final-stage reheater temperature adjusting device and operation method thereof

Abstract

The invention discloses a final-stage reheater temperature adjusting device and an operation method thereof. The final-stage reheater temperature adjusting device comprises a controller, a rotating motor, a driving wheel, a driven wheel, a hydraulic cylinder, a hydraulic cylinder piston rod, a smoke shielding baffle and a power box used for providing electric energy, wherein the smoke shielding baffle is located between a high-temperature superheater in a boiler horizontal flue and a final-stage reheater, an output shaft of the rotating motor is connected with the driving wheel, the driving wheel is matched with the driven wheel, the and driven wheel is connected with the upper end of the smoke shielding baffle; one end of the hydraulic cylinder piston rod is matched with the hydraulic cylinder, and the other end of the hydraulic cylinder piston rod is inserted into the boiler horizontal flue and then connected with the smoke shielding baffle; and the controller is connected with the control end of a piston cylinder and the control end of the rotating motor. According to the device and the operation method of the device, the phenomenon of contamination and slagging of the heating surface of the final-stage reheater in the long-term high-load operation state of the boiler can be effectively relieved, and the operation safety and reliability of a unit are improved.

Description

technical field [0001] The invention belongs to the technical field of temperature regulation of a heating surface of a coal-fired boiler, and relates to a device for temperature regulation of a final reheater and an operating method thereof. Background technique [0002] In recent years, the power industry has developed rapidly, and supercritical and ultra-supercritical thermal power units have become the main units in active service in my country. With the development of power plant boilers in the direction of high parameters and large capacity, the problem of steam temperature deviation and heating surface overheating caused by unbalanced combustion in the furnace is becoming more and more serious, which has become one of the main problems affecting the safe and stable operation of the unit. At the same time, due to changes in the power consumption structure, civilian power consumption continues to increase, and the peak-to-valley difference of the power grid is increasin...

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Problems solved by technology

The above adjustment methods all have different degrees of problems in the current operation of the unit: for example, the time lag of steam temperature adjustment is too large when the method of separating the flue baffle is used, the relationship between the opening of the baffle and the air temperature is nonlinear, and the baffle is only at a certain opening. There is a good adjustment effect within the range; the adjustment method of changing the flame center has high sensitivity and small time lag, but the accuracy is not high, and various unfavorable factors make it difficult to adjust the final reheat steam temperature during the rapid load change process of the unit

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