I. Introduction

 

 

In the choice and use of lining material for protection of stack from air pollution, the engineer should solve problems such as drastic temperature change, accessory pipe, and reheating in PGD industry. Blocks for GI-180 lining is a material of low expansion of 55×10^-7/℃, which does not have cracks at severe temperature change to maintain the block system stably.
GI-180 lining system has excellent corrosion-resistance. Air pollution from FGD system is composed of acidic gas and other various condensates which are not absorbed into borosilicate glass and are proved to be the right materials under these poor conditions.
Since the block has the porous structure, it does not allow any acidic gas or acidic condensates to penetrate under the pressured condition in the sealed system. And this block system acts helps the primer (GInsulation-181) resist against primary corrosion and helps adhesives work well on the surface of the stack structure.
The adhesive(GInsulation-180) used on that is the secondary preventive device to adhere the blocks and adhere them to the fundamental structure of the stack.
The adhesive has elasticity(between the wall surface and block) to absorb possible additional temperature change as well as the heat or structural stress between the fundamental structure of the stack and the glass block. Blocks excellent insulating ability reduces cost for any additional insulation on the exterior of the fundamental structure, which proves that the block system is economically efficient.
It is convenient to construct and can be used in any area as a light weight material in protecting steel-frames, concrete, and blocks which explains that the block system in FGD industry is a reliable material for a long period of time.