Papers by Keyword: Steam Boiler

Abstract: The paper summarizes results of failure root cause analysis of the driven part of the screw conveyor shaft for transfer of combustion residues (ash and slag) of a power plant steam boiler. The paper presents also the results of material analysis of selected components of this conveyor to be evaluated their material quality.

Abstract: As a new type of heating equipment, the heat medium heater furnace overcomes the shortage of the traditional heating methods such as the boiler, heating furnace. Through the comparison and analysis of the field application between the heat medium heater, YQWP - 4000/1.6/220/180-QT, and steam boiler in a central gathering station of Changqing oil field, results indicated: in the condition of 0.3 MPa pressure and 200 °Ctemperature above, the heat medium heater is higher thermal efficiency, more safety and security than steam boiler, and it do not pollute the environment and significantly save energy. One the heat medium heater saves by 982700 RMB than one set of steam boiler per each year. Due to the good economy, heat medium heater is suitable for the heating and heat supply of the large-scale central gathering station in the oil field. Thus, heat medium heater has a good application prospects. And the field application of the heat medium heater provides oil field energy saving and safe production with a certain reference in oil field.

Abstract: This article is focused on optimization of fundamental utility properties and technological process of advanced low alloy steel 15NiCuMoNb5 used for power engineering mainly for production of large capacity steam boilers. Consequently problem critical locality in weld after post weld heat treatment is studied. Optimization of welding technology is proposed. Fracture behaviour of welded joint made from boiler plates 80 mm in thickness of 15NiCuMoNb5 type steel after N + T PWHT regime after welding procedure were studied. Stable crack growth measurement and evaluation of fracture toughness of base material as well as weld metal in temperature region from 0 up 350°C were carried out. Unstable cleavage fracture and fracture toughness KJc of both parts of welded joint at test temperatures cover the transition region were evaluated. The reference temperature T0 approach was used for evaluation of temperature dependence of fracture toughness in transition range.