公开(公告)号：US11994286B2

公开(公告)日：2024-05-28

申请号：US17500360

申请日：2021-10-13

Applicant: Zhejiang University

Inventor： Zhongyang Luo ,  Chunjiang Yu ,  Qinhui Wang ,  Mengxiang Fang ,  Hengli Zhang ,  Leming Cheng

IPC: F23B90/02 ,  C23F15/00 ,  F22B37/02 ,  F23G5/48 ,  F23G7/00 ,  F23J7/00 ,  F26B3/04 ,  F28F19/02 ,  G01B21/08 ,  C23C26/00

CPC classification number: F23B90/02 ,  C23F15/00 ,  F23J7/00 ,  F26B3/04 ,  F28F19/02 ,  G01B21/08 ,  F28F2245/00

Abstract: A method of preventing high temperature corrosion on a heat exchanging surface of a biomass boiler, including: a first feeding step, supplying a first biomass fuel to the boiler; a deposition step, performing combustion on the first biomass fuel during initial operation of the boiler, and forming an inert deposition layer on a surface of a heat exchanger of the boiler; a second feeding step, supplying a second biomass fuel different from the first biomass fuel to the boiler; and a normal combustion step, performing combustion on the second biomass fuel. A direct contact of an alkali metal chloride with a metal pipe wall is prevented by forming an inert deposition layer on the surface of the heat exchanger of the boiler in the deposition step, thereby establishing a physical barrier between the heat exchanging surface and the alkali metal chloride to prevent corrosion on the metal pipe wall.

公开(公告)号：US20220113022A1

公开(公告)日：2022-04-14

申请号：US17500360

申请日：2021-10-13

Applicant: Zhejiang University

Inventor： Zhongyang Luo ,  Chunjiang Yu ,  Qinhui Wang ,  Mengxiang Fang ,  Hengli Zhang ,  Leming Cheng

IPC: F23B90/02 ,  C23F15/00 ,  F28F19/02 ,  F23J7/00 ,  G01B21/08 ,  F26B3/04

Abstract: The present invention provides a method of preventing high temperature corrosion on a heat exchanging surface of a biomass boiler, including: a first feeding step, supplying a first biomass fuel to the boiler; a deposition step, performing combustion on the first biomass fuel during initial operation of the boiler, and forming an inert deposition layer on a surface of a heat exchanger of the boiler; a second feeding step, supplying a second biomass fuel different from the first biomass fuel to the boiler; and a normal combustion step, performing combustion on the second biomass fuel. A direct contact of an alkali metal chloride with a metal pipe wall is prevented by forming an inert deposition layer on the surface of the heat exchanger of the boiler in the deposition step, thereby establishing a physical barrier between the heat exchanging surface of the boiler and the alkali metal chloride to effectively solve a problem of preventing corrosion on the metal pipe wall of the boiler.