Исследование абразивного износа в газоохладителе ПГУ-ВЦГ
Аннотация
В работе проанализированы способы охлаждения синтез-газа, конструкции газоохладителей. Выбран конвективный газоохладитель со спиральными трубами. Рассмотрены механизмы эрозионного износа твердыми частицами. Выполнено CFD моделирование эрозионного золового износа выбранного конвективного газоохладителя. Для уменьшения износа рассматривалась установка обтекателя двух форм: конус и полусфера. Результаты показали, что установка обтекателя улучшает распределение потока газа по каналам ГО, что приводит к уменьшению износа. Лучшие результаты получены с конусообразным обтекателем.
Ключевые слова: абразивный износ; газоохладитель; летучая зола; ПГУ-ВЦГ; эрозионный износ; CFD.
In this final qualifying work, methods for cooling synthesis gas and the design of gas coolers were analyzed. A convection gas cooler with spiral pipes was selected. The mechanisms of erosion wear by solid particles are considered. A numerical simulation of erosion ash wear of a selected convective gas cooler was performed. To reduce wear, the installation of a fairing in two forms was considered: a cone and a hemisphere. The results showed that the installation of the fairing improves the distribution of the gas flow through the GO channels, which leads to a decrease in wear. From the considered forms the best results are obtained with a cone-shaped fairing.
Key words: abrasive wear; CFD; erosion wear; fly ash; gas cooler; IGCC.
Ключевые слова: абразивный износ; газоохладитель; летучая зола; ПГУ-ВЦГ; эрозионный износ; CFD.
In this final qualifying work, methods for cooling synthesis gas and the design of gas coolers were analyzed. A convection gas cooler with spiral pipes was selected. The mechanisms of erosion wear by solid particles are considered. A numerical simulation of erosion ash wear of a selected convective gas cooler was performed. To reduce wear, the installation of a fairing in two forms was considered: a cone and a hemisphere. The results showed that the installation of the fairing improves the distribution of the gas flow through the GO channels, which leads to a decrease in wear. From the considered forms the best results are obtained with a cone-shaped fairing.
Key words: abrasive wear; CFD; erosion wear; fly ash; gas cooler; IGCC.