Method for solving boiler tail flue abrasion based on gas-solid two-phase flow numerical research

Abstract

The invention discloses a method for solving boiler tail flue abrasion based on gas-solid two-phase flow numerical research, which comprises the following steps: S1, acquiring coal-fired power plant flue design conditions, process type selection and abrasion conditions, and adopting a abrasion model suitable for a coal-fired power plant boiler tail flue according to the numerical simulation research of gas-solid two-phase flow and fly ash characteristic test data; s2, based on the abrasion model suitable for the tail flue of the coal-fired power plant boiler, obtaining the abrasion rule of flue internal parts and equipment, determining the abrasion part and abrasion loss, and predicting the service life of materials and the service life of the equipment; and S3, proposing a systematic abrasion treatment scheme for the wear rules of the internal parts and equipment of the tail flue of each coal-fired power plant. The invention provides a method for systematically treating the abrasion of the tail flue of the boiler of the coal-fired power plant. Original passive anti-abrasion measures are changed into active anti-abrasion treatment, the workload and cost of maintenance and overhaulof a power plant are effectively reduced, the erosion and abrasion resistance of a boiler tail flue system is improved, and the safety and reliability of a tail flue and equipment are improved.

Description

technical field [0001] The invention belongs to the technical field of resources and environment, and relates to a method for solving the wear of the tail flue of a boiler based on the numerical research of gas-solid two-phase flow. Background technique [0002] Since the ultra-low emission transformation of coal-fired power plants, many coal-fired power plants have different degrees of dust accumulation and wear problems during the operation of tail flues, deflector components, denitrification catalysts, and low-temperature economizers. These dust accumulation and wear problems Directly affect the safe and economical operation of the unit: Wear-out and tearing of the deflector will directly lead to deterioration of the denitrification flow field; catalyst collapse and perforation cause flue gas short circuit and increased ammonia escape; the inlet module of the low-temperature economizer is severely worn and very It is easy to cause module leakage, resulting in clogging and...

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Problems solved by technology

[0004] 1. The on-site wear control work of coal-fired power plants is mainly concentrated on the wear test of the local area of ​​the boiler flue such as the side of the denitrification catalyst. Facing the prevalence of wear problems in various coal-fired power plants, there is no overall solution for the tail flue of coal-fired power plant boilers. Carry out systematic anti-wear thinking

[0005] 2. For the wear control of the tail flue of the coal-fired power plant boiler, some passive anti-wear measures are mainly formed. Only after serious wear problems occur on site will some passive wear control measures be taken, such as: heat exchange Measures such as sticking anti-wear angle steel on pipe fittings, adding anti-wear coating on the surface, and adding fake heat exchange tubes upstream have a certain lag, and it is impossible to predict the wear position and amount of wear during engineering design, and take corresponding anti-wear measures in advance

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