CN-122009691-A - Corrosion protection system and method for methanol storage tank

CN122009691ACN 122009691 ACN122009691 ACN 122009691ACN-122009691-A

Abstract

The application discloses a corrosion protection system and method for a methanol storage tank, relates to the technical field of corrosion protection, and aims to improve the corrosion protection effect of the methanol storage tank. The corrosion protection system of the methanol storage tank comprises the methanol storage tank, a data acquisition device, a control decision device and an execution device, wherein the data acquisition device and the execution device are positioned in an aqueous phase in the methanol storage tank, the data acquisition device is used for acquiring the concentration of a plurality of ions in the aqueous phase of the methanol storage tank and sending the concentration of each ion to the control decision device, the control decision device is used for determining a protection operation level based on the concentration of each ion, a first concentration threshold value of each ion and a second concentration threshold value of each ion, the control decision device is also used for determining a target protection operation strategy based on the protection operation level, the control decision device is also used for sending the target protection operation strategy to the execution device, and the execution device is used for executing the target protection operation strategy.

Inventors

LI XIAOLONG
ZHANG JIE
ZHU XINLONG
GU ZIQIANG
LI LEI
QIU SHUJUAN
GAO TAO
HU XU
WU HAIBIN
LIU PENG
LIANG KE
LIN XIAOFEI
WANG YIXUAN

Assignees

国家石油天然气管网集团有限公司
国家管网集团西部管道有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260331

Claims (10)

1. The corrosion protection system of the methanol storage tank is characterized by comprising the methanol storage tank, data acquisition equipment, control decision making equipment and execution equipment, wherein the data acquisition equipment and the execution equipment are positioned in an aqueous phase in the methanol storage tank, the data acquisition equipment is in communication connection with the control decision making equipment, and the control decision making equipment is in communication connection with the execution equipment; the data acquisition equipment is used for acquiring the concentration of various ions in the water phase of the methanol storage tank and sending the concentration of each ion to the control decision-making equipment, wherein the various ions comprise chloride ions, sulfate ions and sodium ions; the control decision device is used for determining a protection operation level based on the concentration of each ion, the first concentration threshold value of each ion and the second concentration threshold value of each ion, and is also used for determining a target protection operation strategy based on the protection operation level; the executing device is used for executing the target protection operation strategy.
2. The system of claim 1, wherein the level of guard operation comprises a security level, an early warning level, and an alarm level.
3. The system according to claim 1, wherein the control decision device is specifically configured to: Determining the protection operation level as a safety level in the case that the concentration of each ion is smaller than a first concentration threshold value corresponding to each ion; Under the condition that the concentration of the first ions is larger than a first concentration threshold value of the first ions and smaller than a second concentration threshold value of the first ions, determining the protection operation level as an early warning level; The guard operation level is determined to be an alarm level in the event that the concentration of the first ions is greater than a second concentration threshold of the first ions.
4. The system according to claim 1, wherein the control decision device is specifically configured to: Determining that the target protection operation strategy is a first protection operation strategy under the condition that the protection operation level is a safety level, wherein the first protection operation strategy is used for indicating the execution equipment to execute the operation of monitoring the concentration of various ions in the water phase; Under the condition that the protection operation level is an early warning level, determining that the target protection operation policy is a second protection operation policy, wherein the second protection operation policy is used for indicating the execution equipment to execute the operation of adding corrosion inhibitor and/or physical adsorption material into the water phase at a first rate so as to reduce the ion concentration; And under the condition that the protection operation level is an alarm level, determining that the target protection operation policy is a third protection operation policy, wherein the third protection operation policy is used for indicating the execution equipment to execute the operation of adding corrosion inhibitor and/or physical adsorption material into the water phase at a second rate so as to reduce the ion concentration, and the second rate is larger than the first rate.
5. The system of claim 4, wherein the third guard operation policy is further configured to instruct the execution device to perform an operation of sending alert information to a control center or a cloud platform.
6. The system of claim 1, wherein the system further comprises a controller configured to control the controller, The data acquisition equipment is also used for acquiring the pH value of the water phase of the methanol storage tank and sending the pH value of the water phase to the control decision-making equipment; the control decision device is further used for generating a fourth protection operation strategy when the pH value of the water phase is not in a preset range, wherein the fourth protection operation strategy is used for indicating the execution device to execute the operation of adding a pH regulator into the water phase to adjust the pH value of the water phase to the preset range; the executing device is further configured to execute the fourth protection operation policy.
7. The system of claim 1, wherein the data acquisition device comprises a water quality sensor and an ion selective electrode array; The water quality sensor is used for collecting water quality parameters, wherein the water quality parameters comprise at least one of pH value, conductivity and temperature; the ion selective electrode array is used for collecting the electrochemical activity of various ions, and the electrochemical activity is used for indicating the activity degree of the ions.
8. The system of claim 7, wherein the data acquisition device further comprises a microprocessor; The microprocessor is used for carrying out concentration compensation on the electrochemical activities of various ions based on the water quality parameters, and determining the concentrations of the various ions.
9. The system of claim 7, wherein the water quality sensor comprises a pH sensor, a conductivity sensor, and a temperature sensor.
10. A method of corrosion protection for a methanol storage tank, the method comprising: collecting the concentration of a plurality of ions in the water phase of a methanol storage tank, wherein the plurality of ions comprise chloride ions, sulfate ions and sodium ions; determining a guard operation level based on the concentration of each ion, the first concentration threshold of each ion, and the second concentration threshold of each ion, and determining a target guard operation strategy based on the guard operation level; and executing the target protection operation strategy.

Description

Corrosion protection system and method for methanol storage tank Technical Field The application relates to the technical field of corrosion protection, in particular to a corrosion protection system and method for a methanol storage tank. Background During operation of the methanol storage tank, a "water phase space" inevitably exists in the tank due to factors such as temperature variation, air humidity and the like. Because water is higher than the density of methyl alcohol, the aqueous phase can contact with the storage tank at the bottom of the methyl alcohol storage tank, and impurity ions in the aqueous phase can corrode the tank wall, thereby seriously threatening the structural integrity and safe operation of the storage tank. At present, the corrosion protection method for the methanol storage tank in the related art mainly comprises the steps of manually and periodically removing water phase deposited in the methanol storage tank, if the water phase in the storage tank is removed at high frequency, the protection cost is often increased, and if the frequency of removing the water phase in the storage tank is reduced, the corrosion probability of the methanol storage tank is increased, so that the corrosion protection method for the methanol storage tank in the related art has the problem of poor corrosion protection effect of the methanol storage tank. Disclosure of Invention The application aims to provide a corrosion protection system and method for a methanol storage tank, and aims to improve the corrosion protection effect of the methanol storage tank. In order to achieve the above purpose, the application adopts the following technical scheme: The application provides a corrosion protection system of a methanol storage tank, which comprises the methanol storage tank, data acquisition equipment, control decision equipment and execution equipment, wherein the data acquisition equipment and the execution equipment are positioned in an aqueous phase in the methanol storage tank, the data acquisition equipment and the control decision equipment are in communication connection, the control decision equipment and the execution equipment are in communication connection, the aqueous phase is a liquid layer positioned at the inner bottom of the methanol storage tank, the data acquisition equipment is used for acquiring the concentration of a plurality of ions in the aqueous phase of the methanol storage tank and sending the concentration of each ion to the control decision equipment, the plurality of ions comprise chloride ions, sulfate ions and sodium ions, the control decision equipment is used for determining a protection operation level based on the concentration of each ion, a first concentration threshold of each ion and a second concentration threshold of each ion, the control decision equipment is also used for determining a target protection operation policy based on the protection operation level, the control decision equipment is also used for sending the target protection operation policy to the execution equipment, and the execution equipment is used for executing the target protection operation policy. In one possible implementation, the protection operation level includes a security level, an early warning level, and an alarm level. In a possible implementation manner, the control decision device is specifically configured to determine a protection operation level as a safety level when the concentration of each ion is smaller than a first concentration threshold value corresponding to each ion, determine the protection operation level as an early warning level when the concentration of the first ion is larger than the first concentration threshold value of the first ion and smaller than a second concentration threshold value of the first ion, and determine the protection operation level as an alarm level when the concentration of the first ion is larger than the second concentration threshold value of the first ion. In a possible implementation manner, the control decision device is specifically configured to determine that the target protection operation policy is a first protection operation policy when the protection operation level is a safety level, the first protection operation policy is used to instruct the execution device to execute an operation of monitoring the concentration of multiple ions in the water phase, determine that the target protection operation policy is a second protection operation policy when the protection operation level is an early warning level, instruct the execution device to execute an operation of adding a corrosion inhibitor and/or adding a physical adsorption material to the water phase at a first rate to reduce the concentration of the ions, determine that the target protection operation policy is a third protection operation policy when the protection operation level is an alarm level, and instruct the execution device to execute an operation of