High-dispersion anti-scaling agent of dry dust-removal blast furnace gas residual pressure turbine power generating system

Abstract

The invention relates to a high-dispersion anti-scaling agent of a dry dust-removal blast furnace gas residual pressure turbine power generating system. The anti-scaling agent is composed of the following chemical components in percentage by weight: 10-20% of dioctyl / decyl dimethyl ammonium chloride, 14-20% of dicyclohexyl amine and 16-20% of triethanolamine mixture, 0.2-1% of polymaliec anhydride, 10-35% of ethanol and the balance of water, wherein the triethanolamine mixture is composed of 50-80% of triethanolamine and 20-50% of monoethanolamine. The anti-scaling agent is continuously injected on site by a metering pump in a venous point injection mode, and forms a layer of corrosion and scale inhibitor protecting film, of which one end is metallophilic and the other end is hydrophobic, on the surface of each metal parts of movable and stationary blades contacting the anti-scaling agent, so as to prevent salt components, acidic gases and other substances from contacting the surfaces of the blades, thereby maintaining the metal surfaces of the blade and other parts of the device to be smooth and achieving the effects of corrosion inhibition and scaling resistance. By using the anti-scaling agent provided by the invention, the overhaul period of the system is prolonged, black deposited scale is not generated in the movable and stationary blades of a turbine and the system. The the anti-scaling agent has wide market prospects.

Description

【Technical field】 [0001] The invention relates to a scale inhibitor, in particular to a highly dispersed scale inhibitor for a dry-type dedusting blast furnace gas residual pressure turbine power generation system. 【Background technique】 [0002] When the blast furnace gas is dry-type dedusted, most of the dust can be removed, but a certain amount of floating dust, water vapor, oil mist and various acid gases (such as: H 2 S, HCL, CO 2 etc.), at the same time, due to the existence of erosion and corrosion, some corrosion products in the gas pipeline will also be mixed in the blast furnace gas, and finally the blast furnace gas entering the dry dust removal blast furnace gas residual pressure turbine power generation system (abbreviation, TRT) is gas- Vapor-solid multiphase flow. After the blast furnace gas enters the TRT, the temperature will gradually decrease due to expansion and work. The acid gas in the blast furnace gas will dissolve in the condensed water to form an ...

AI Technical Summary

Problems solved by technology

Due to uneven fouling, the dynamic balance of the device is destroyed, resulting in a decrease in TRT power generation, an increase in the vibration value of the spindle until it automatically trips and stops, and the system maintenance period is short (less than 2 months)

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