A kind of boiler coking inhibitor and preparation method thereof

Abstract

The invention discloses a boiler coking inhibitor and a preparation method thereof. The raw materials of the invention include: nitrate compound, borax, heavy oil, boric acid, active rare earth metal powder, modified nano-alumina, combustion aid, Thermally conductive dispersant, bulking agent and corrosion inhibitor, the invention relates to the technical field of chemical products. The boiler coking inhibitor and its preparation method can increase the melting temperature of coal ash by adding heavy oil to the inhibitor, and form friable, powdery and low-adhesion furnace ash, which is easy to remove, and at the same time achieves a good By adding a thermally conductive dispersant to the inhibitor, the crystal growth is rapidly induced before the formation of the glassy molten phase, and the crystal nucleus structure is changed to reduce the surface tension. The ash particles moving together with the flue gas form cracks in the coke body On the surface, it destroys coking to form a hard continuum, which is easy to remove, making it easy to flow, brittle and powdery, easy to remove.

Description

technical field [0001] The invention relates to the technical field of chemicals, in particular to a boiler coking inhibitor and a preparation method thereof. Background technique [0002] Boiler coking is a relatively common phenomenon in the operation of coal-fired industrial boilers. It will destroy the normal combustion conditions, reduce the output of the boiler, disrupt the normal water cycle, cause a tube burst accident, and in severe cases, the furnace outlet will be blocked and the furnace will be shut down. Decoking does not corrode the boiler equipment, and can form a protective film on the metal surface to reduce the corrosion of the heating surface of the boiler and prolong the life of the boiler. Boiler decoking can remove the old ash and coke on the heating surface of the boiler and prevent new coke and ash deposits, keep the heating surface clean, reduce thermal resistance, improve boiler thermal efficiency, increase boiler output, and reduce coal consumption...

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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a boiler coking inhibitor and a preparation method thereof, which solves the problem that the existing boiler coking inhibitors have poor inhibitory effects and cannot realize the improvement of coal ash by adding heavy oil to the inhibitor. If the melting temperature is too low, the inner wall of the boiler will be coked to form brittle, powdery, low-adhesive and easy-to-remove furnace ash. At the same time, adding a heat-conducting dispersant to the inhibitor can not achieve rapid crystal growth before the formation of a glass-like molten phase, changing the crystal. The core structure reduces the surface tension to improve the coking inhibition effect. It cannot achieve the formation of a cracked surface in the coke body, destroying the coking to form a hard continuum, and cannot achieve the physical destruction of the combination of slag and coke ash to make coking appear easy. Problems with flowability, friability and powdery purposes

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