DEPOSIT REMEDIATION IN COAL-FIRED GAS-TURBINES THROUGH THE USE OF ADDITIVES

被引：7

作者：

SPIRO, CL ^{[1
]}

CHEN, CC ^{[1
]}

KIMURA, SG ^{[1
]}

LAVIGNE, RG ^{[1
]}

SCHIELDS, PW ^{[1
]}

机构：

[1] GE,CORP RES & DEV LAB,SCHENECTADY,NY 12345

来源：

PROGRESS IN ENERGY AND COMBUSTION SCIENCE | 1990年 / 16卷 / 04期

关键词：

D O I：

10.1016/0360-1285(90)90030-7

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Deposit formation represents a key impediment to the eventual commercialization of a direct coal-fired gas turbine engine. Deposits result from the thermal decomposition of coal-borne mineral matter followed by impact and adhesion along the hot gas pathway. One strategy for deposit abatement is hot gas cleanup to remove particulate before entering the turbine. An alternative strategy, described in this article, is to modify the mineral matter/ash chemistry to render it non-adherent through the use of additives. In this way, the complexity and expense of hot gas cleanup is obviated. To date, alumina, boehmite, and a variety of kaolin clay additives have been tested in a coal-water mixed fired gas turbine simulator. A washed kaolin clay has proved to be most effective in reducing airfoil deposition. A mechanism involving in situ slag decomposition, crystallization, and spontaneous spalling is proposed. © 1990.

引用

页码：213 / 220

页数：8