Heating technique of slag-tapping hole in high-temperature coal gasifier

Development of a Heating Process of a Slag-Tapping Hole by Syngas Burning in a 150 t/d Entrained-Bed Coal Gasifier

“…Figure shows schematic diagrams of the 150 t/d entrained-bed coal gasifier in EAGLE . EAGLE, which has been in use since 2002, − is a pilot plant to develop a highly efficient and reliable coal gasification system through gasification, syngas clean-up, power generation with a gas turbine, and CO 2 capture from the syngas.…”

“…Around the hole, the molten slag continues to be heated not only by the sensible heat of the descended syngas itself but also by the combustion heat between the syngas and oxygen supplied from the heating nozzles. In our previous study, it was effective to supply an equal quantity of the oxygen and nitrogen mixture from a pair of heating nozzles facing each other because the descended syngas immediately burned with oxygen below the slag-tapping hole …”

“…On the other hand, we have developed a technique to heat the undersurface of the hole without using flux or auxiliary fuel in an entrained-bed coal gasifier. − The key concept of this technique is to burn the syngas that descends through the hole by supplying oxygen from a pair of nozzles, installed just below the hole and facing each other. In our previous study, we optimized the heating conditions of these nozzles to supply equal amounts of a mixture of oxygen and nitrogen.…”

“…On the other hand, we have developed a technique to heat the undersurface of the hole without using flux or auxiliary fuel in an entrained-bed coal gasifier. − The key concept of this technique is to burn the syngas that descends through the hole by supplying oxygen from a pair of nozzles, installed just below the hole and facing each other. In our previous study, we optimized the heating conditions of these nozzles to supply equal amounts of a mixture of oxygen and nitrogen. In this study, a design procedure to heat the hole using these nozzles was established through thermal and flow simulations and gasification tests conducted in a 150 t/d entrained-bed coal gasifier in a pilot plant called EAGLE (coal Energy Application for Gas, Liquid and Electricity).…”

Simulation Training System of a Circulating Fluidized Bed Boiler

“…Based on their working principle, many types of these boilers can be found in different industrial sections [1][2][3][4][5]. However, a circulating fluidized bed boiler as an important coal-fired boilers have become high energy steam generators of a lot of thermal power plants because of their advantages such as high burning efficiency, coal adaptability, high desulfurization efficiency, a small amount of nitrogen oxide emissions and ash reuse.…”