A method for putting into operation the external heat exchanger of a supercritical circulating fluidized bed boiler

Abstract

The invention discloses a commissioning method of an external heat exchanger of a supercritical circulating fluidized bed boiler. To solve the existing problems in a conventional external heat exchanger commissioning process, by commissioning the external heat exchanger of the large (super) supercritical circulating fluidized bed boiler, adopting appropriate commissioning time and an appropriate commissioning mode, improving automatic control logic and preventing an ash control valve from vibrating, substantial fluctuation of a hearth bed temperature and an outlet steam temperature of the external heat exchanger is avoided effectively, smooth commissioning and safe operation of the external heat exchanger and the (super) supercritical circulating fluidized bed boiler are ensured, technicalsupport and an operation guide can be provided for subsequent reliable commissioning and running debugging of the external heat exchanger of the (super) supercritical circulating fluidized bed boiler, and the commissioning method has good social benefits.

Description

technical field [0001] The invention belongs to the technical field of circulating fluidized bed boilers, in particular to a method for putting into operation an external heat exchanger of a supercritical circulating fluidized bed boiler. Background technique [0002] With the development of circulating fluidized bed (CFB) boilers towards large-scale and ultra-critical (ultra)critical parameters, the heating surface only arranged in the tail shaft of the furnace can no longer meet the parameter requirements, and part of the heating surface needs to be arranged outside the furnace, that is, outside Displacement Heater. [0003] At present, there are few circulating fluidized bed boilers with external heat exchangers put into operation in China, and only one supercritical circulating fluidized bed boiler with external heat exchangers is put into operation in Sichuan Baima 600MW boiler, which has an external heat exchanger Before it was put into operation, because there was no...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to: aim at the above existing problems, to provide a method that can effectively avoid and solve the main problems existing in the operation process of the existing external heat exchanger, and correctly guide the operation of the boiler technicians, so as to ensure that the external heat exchanger Operation method of supercritical circulating fluidized bed boiler with external heat exchanger for smooth operation and safe operation of the boiler