Composite reagent for boiler and preparation method of composite reagent

Abstract

The invention discloses a composite agent for a boiler and a preparation method of the composite agent, and belongs to the technical field of boiler water treatment agents. The composite agent for the boiler is prepared from the following components in parts by mass: 0.5 to 2 parts of gluconic acid, 0.5 to 2 parts of succinic acid, 0.3 to 0.8 part of a flocculating agent, 0.5 to 1 part of sodium glucoheptonate and 0.5 to 1.5 parts of sodium nitrite. The agent does not contain phosphorus components, so that the problem that phosphorus emission exceeds the standard can be avoided, the condition of eutrophication of a water body can be avoided, the agent is relatively environment-friendly; and the components of the gluconic acid, succinic acid, sodium glucoheptonate and ethylenediamine tetraacetic acid tetrasodium salt in the agent can well chelate ions such as calcium and magnesium in the water body to form soluble salts, the deposition of calcium and magnesium ions can be reduced, so that a good anti-scale effect can be achieved; and the sodium nitrite, benzotriazole and a deoxidant can form a good oxide protection film on a metal steel surface so as to achieve the good corrosion inhibition and passivation effect on the metal surface.

Description

technical field [0001] The invention relates to the technical field of boiler water treatment agents, in particular to a composite agent for boilers and a preparation method thereof. Background technique [0002] During the use of the boiler, after the feed water containing impurities enters the boiler, due to the high concentration of scale components such as calcium and magnesium in the water, when it reaches saturation through continuous evaporation and concentration, solid deposits are precipitated, and these deposits are firm. Adhere to the heating surface to form scale. When scale components such as calcium and magnesium entering the boiler adhere to the heat transfer surface, it will cause heat transfer obstacles. This heat transfer barrier may cause expansion, bending, cracking, and reduction in thermal efficiency of steel due to overheating, and may cause boiler plates and piping to be burned due to overheating. Therefore, people say that scale is the "source of a...

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Problems solved by technology

[0003] In actual operation, the chemical treatment method is usually used, that is, adding an appropriate amount of chemical to the boiler feed water to achieve the purpose of preventing corrosion and scale inhibition of the boiler. Treatment agent, the scale and corrosion inhibition effect of the treatment agent is not very good, and the treatment agent contains phosphorus, so discharge into the river water will lead to eutrophication of the water body, which is not environmentally friendly, so we propose a boiler Composite medicament and preparation method thereof to solve the above problems

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