A construction method of using glass fiber reinforced plastic as a protective material for the inner cavity of a steel-concrete chimney

Abstract

The invention discloses a construction method using glass fiber reinforced plastics as inner cavity protective materials for a steel and concrete chimney, and belongs to the field of flue gas emission. A novel structure is proposed to enable the chimney to be higher in strength and longer in service life. Firstly, a mold having an identical shape and a slightly smaller diameter with the steel and concrete chimney is made, the mold is formed by at least one single mold body, a gel coat with the thickness of 0.3mm to 0.4mm coats or is sprayed on the outer surface of the single mold body, then a glass fiber reinforced plastics composite reinforcement layer is made in a pasting mode, then the single mold body is assembled in the chimney, then resin slurry is injected between the glass fiber reinforced plastics composite reinforcement layer and the inner surface of the chimney, and finally the mold is demounted. The construction method using the glass fiber reinforced plastics as the inner cavity protective materials for the steel and concrete chimney is widely applied to the field of flue gas emission, and prevents sulfur dioxide, smog and other harmful gases which are not eliminated completely from bringing adverse effects on the steel and concrete chimney.

Description

technical field [0001] The invention relates to a construction method using glass fiber reinforced plastic as a protective material for the inner cavity of a steel-concrete chimney, belonging to the field of flue gas discharge. Background technique [0002] The remaining part of the combustion boiler dust collector will be discharged through the chimney after smoke elimination, dust removal and desulfurization. The efficiency of dust removal, desulfurization and smoke elimination can reach up to 90%. Steel-concrete chimneys have poor anti-corrosion performance, or even no corrosion resistance at all. Unremoved sulfur dioxide, smoke and other harmful gases will have an adverse effect on steel-concrete chimneys, especially sulfur dioxide in the smoke reacts with water and water mist. Sulfurous acid, the corrosion of steel-concrete chimney by sulfurous acid will play a destructive role. [0003] Traditional steel-concrete anticorrosion methods are basically divided into two m...

AI Technical Summary

Problems solved by technology

Therefore, manual pasting has very strict requirements on the flatness and smoothness of the steel-concrete surface, and there must be no sand holes, pilling, etc., but the steel-concrete surface often does not meet this standard, especially for circular buildings. Even worse, although manual pasting is repeatedly scraped and squeezed, there will be separation between the cloth layer and the cloth layer, and between the cloth layer and the steel-concrete surface, so glue flow, glue shortage, and air bubbles will appear on the vertical paste. Phenomenon, directly affect the anti-corrosion effect and service life

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