Corrosion inhibitor for steam condensate system of industrial boiler and process for manufacturing same

Abstract

The corrosion inhibitor for industrial boiler steam condensating water system includes alkyl amine with 12-18 carbon atoms or epoxy alkyl amine, Tween-60, Span-60, morpholine, cyclohexylamine and / or ammonia, and water. The corrosion inhibitor is emulsified liquid, and has functions of filming and neutralizing, reasonable steam-liquid distribution ratio, lower consumption, concentration indication, corrosion inhibiting efficiency over 98 %, obvious energy saving function and simple use, and may be used widely in various industrial boiler steam condensating water systems.

Description

technical field [0001] The invention relates to the technical field of boiler water treatment, in particular to an industrial boiler steam condensate water system corrosion inhibitor and a manufacturing method thereof. Background technique [0002] Steam condensate, especially boiler steam condensate, is high-quality boiler feed water containing heat energy. Recycling steam condensate is the most effective measure to save water and energy for boilers. The heat contained in condensed water can reach 20% to 30% of the total heat of steam. If it is recycled and utilized, it can significantly reduce boiler fuel consumption, reduce the amount of softened water, reduce steam production costs, and improve boiler water quality. Due to the improvement of boiler water quality, it can also greatly reduce boiler blowdown and heat energy loss caused by blowdown, improve boiler efficiency, and make boiler operation safer. However, since the steam contains oxygen and free carbon dioxide, ...

AI Technical Summary

Problems solved by technology

When untreated condensed water is used as boiler make-up water, a large amount of iron ions contained in the water will cause secondary scaling and under-scaling corrosion on the heat transfer surface of the boiler, causing greater harm, making the direct recycling of steam condensed water have certain advantages difficulty

Therefore, many industrial boilers do not consider the recovery of condensed water in the design and installation of the system and steam-using equipment, and discharge the good-quality steam condensed water to the ditch to waste

Although some users recycle condensed water as boiler feed water, due to the lack of effective pipeline anti-corrosion measures and condensed water treatment technology, the condensed water recovery pipeline is severely corroded, and the content of iron ions in condensed water is high, which directly affects the safe operation of the boiler.

The existing iron removal measures are mainly aeration and filtration to remove iron. Although it can reduce the concentration of iron ions in condensed water, pollution still exists and corrosion still occurs. Generally, condensed water pipelines will leak due to corrosion and perforation in two to three years, resulting in condensation. Water pipes are riddled with holes and cannot be repaired

Moreover, the problem of this method is that the investment is large, the floor area is large, and the corrosion of the condensate pipeline cannot be completely prevented.

At present, the recycling rate of condensed water in industrial boilers is less than 20%.

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