Composite deoxidizing scale inhibitor applied to low-hardness water of boiler and preparation method of composite deoxidizing scale inhibitor

Abstract

Disclosed are a composite deoxidizing scale inhibitor applied to low-hardness water of a boiler and a preparation method of the composite deoxidizing scale inhibitor. The composite deoxidizing scale inhibitor is prepared from, by weight, 10-30 parts of phytic acid, 6-18 parts of acetaldehyde oxime, 12-22 parts of 3-methoxypropylamine, 15-30 parts of sodium lignosulfonate-maleic anhydride copolymer, 5-20 parts of hydroxyethyl ethylene diamine triacetic acid and 10-40 parts of deionized water. The composite deoxidizing scale inhibitor applied to the low-hardness water of the boiler and the preparation method of the composite deoxidizing scale inhibitor have the advantages that the use of the boiler can be maintained for a long time, calcium and magnesium ions and other metal ions in the water are complexed and filtered out and removed by a filter in a system, and therefore the purpose of softening the water is achieved. The composite deoxidizing scale inhibitor has the advantages of being environmentally friendly, easy to degrade and unlikely to generate secondary pollution after being discharged. The chemical cleaning frequency of the boiler can be effectively reduced, the dischargeof waste liquid is indirectly reduced, the production efficiency is improved, and the environment-friendly production is facilitated. The composite deoxidizing scale inhibitor has excellent scale inhibition performance and high dissolved oxygen removal efficiency.

Description

technical field

[0001] The invention relates to the technical field of water treatment, in particular to a composite deoxidizing and scale-inhibiting agent applied to boiler low-hardness water and a preparation method thereof. Background technique

[0002] At present, the water quality of fixed steam boilers and steam-water dual-purpose boilers (rated outlet steam pressure ≤ 2.5MPa) using water as the medium must be implemented in accordance with the requirements of industrial boiler water quality (GB1576-2001), and the total hardness in the requirements is ≤ 0.03mmol / L. Oxygen ≤ 0.1mg / L, but in the actual industrial production process, it is difficult for many enterprises to ensure that the water quality of industrial boilers meets the national standard. The data comparison of the boilers of many enterprises shows that the total hardness in water quality is ≤2mmol / L, and the dissolved oxygen is ≤1mg / L, in the daily boiler maintenance, the furnace wall is corroded, and some...

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