Process condensed water corrosion evaluation method for refining and petrochemical device

Abstract

The invention provides a process condensed water corrosion evaluation method for a refining and petrochemical device. The process condensed water corrosion evaluation method comprises the following steps that a pH value of condensed water and the concentration of Fe2+ and Fe3+ in a corrosion system of the refining and petrochemical device are obtained; a corrosion state, a corrosion effect and a corrosion control method of the pH value on the corrosion system are determined; a corrosion state, a corrosion effect and a corrosion control method of the concentration of Fe2+ and Fe3+ on the corrosion system are determined; according to the corrosion states, the corrosion effects and the corrosion control methods of the pH value and Fe2+ and Fe3+ on the corrosion system, a corrosion state, a corrosion effect and a corrosion control method of the pH value and the concentration of Fe2+ and Fe3+ of the process condensed water on the corrosion system are obtained; and the corrosion state, the corrosion effect and the corrosion control method of the pH value and the concentration of Fe2+ and Fe3+ of the process condensed water on the corrosion system are integrated. The process condensed water corrosion evaluation method can form a corrosion evaluation conclusion with clear corrosion causes, clear corrosion problems and effective corrosion control measures for the process condensed water.

Description

technical field [0001] The invention relates to a method for evaluating corrosion, in particular to a method for evaluating corrosion of process condensed water of refining and chemical equipment. Background technique [0002] The oil refining and chemical industry is a very dangerous industry. Any corrosion leakage in the process of petroleum processing may lead to serious safety production accidents, resulting in fires, explosions, casualties, property losses, environmental pollution and other vicious production equipment. ACCIDENT. In the process of petroleum processing, corrosive media such as acids (such as naphthenic acid) and sulfides in crude oil must exist, which will run through the equipment in the entire refining and production process, and corrosion of equipment in refining and chemical equipment is unavoidable. What can be avoided is only the severity of corrosion is different. Therefore, corrosion is the core factor affecting the safety and long-term operatio...

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Problems solved by technology

The above method has the following problems: 1) No further judgment was made on the degree of exceeding the standard, and no further division and warning were made on the level and scope of the exceeding standard; 2) The corrosion state and corrosion impact of the corrosion system caused by the exceeding standard were not further analyzed and explained. The technicians cannot know the causes of corrosion, the impact of corrosion and the control methods; 3) The exact corrosion reduction control measures are not given, and the technicians cannot know how to deal with different situations of exceeding the standard or not exceeding the standard, so it is a relatively extensive And inaccurate corrosion monitoring methods; 4) It is impossible to form a complete and effective corrosion evaluation conclusion to guide corrosion control

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