A surface-active amine preservative for thermal power plant boiler shutdown protection

Abstract

The invention relates to a surface active amine corrosion inhibitor for boiler shutdown protection in a heat-engine plant. Each litre of the surface active amine corrosion inhibitor contains 1-5mg of hydrazine, 100-500mu g of ethanolamine, 10-100mu g of hexamethylene tetramine, 1-10mg of N-(2-amino ethyl) morpholine, 20-200mu g of pyrazine and 50-500mu g of piperazine; ammonia water is used to regulate the pH value to 9.3-9.7; and the solvent of the surface active amine corrosion inhibitor is desalted water or deionized water. Compared with the prior art, the surface active amine corrosion inhibitor prepared according to the invention has good protection effect on a boiler and steam turbine high / low-temperature equipment during the shutdown period, and the negative effects that a samplingtube is blocked, resin precision processing performance can not be influenced, starting and flushing time is long, the corrosion inhibitor deposits on the surface of the low-temperature equipment fora long term and is slowly released and the like are not generated.

Description

technical field

[0001] The invention relates to a surface active agent, in particular to a surface active amine preservative used for the outage protection of boilers in thermal power plants. It is mainly used for surface active amine anticorrosion treatment for supercritical and air-cooled unit boilers in power plants and steam turbine high / low temperature equipment shutdown protection for water vapor side. Background technique

[0002] If the boilers in thermal power plants are not protected during shutdown, the boilers and steam turbine equipment will be corroded. When the boiler is started, it will affect the quality of the water-steam system, cause the deposition of corrosion products on the heating surface and affect the heat exchange efficiency of the unit, and even deposit on the blade surface of the steam turbine to reduce the output of the steam turbine, which greatly affects the safe and stable operation of thermal power plant equipment . Therefore, thermal powe...