-
Anonymous users2024-02-06Do not allow air to enter the water vapor system of the standby boiler. For example, a certain steam pressure or feed water pressure is maintained in the boiler.
Keep the metal surface of the standby boiler equipment fully dry. For example, the method of hot pressure water discharge is adopted, and the waste heat of the furnace is used for drying or the hot air of the adjacent operating boiler is used for drying. It has been proven that corrosion can be prevented when the relative humidity inside the standby boiler equipment is less than 20%.
A protective film or adsorption film with anti-corrosion effect is formed on the metal surface. For example, after the furnace is stopped and the water is discharged, the anti-corrosion agent (such as cyclohexylamine carbonate) and other anti-corrosion agents are used.
Soak the metal surface in an aqueous solution containing oxygen scavengers or other protective agents. Such as soaking in hydrazine or ammonia solution.
Fill the standby boiler equipment with inert gas. Such as filling with high-purity nitrogen or ammonia.
In fact, the above principles can be summed up in three aspects: removing the cathodic depolarizer and polarizing the cathode, or forming a stable protective film or adsorption film to polarize the anode, or making the metal surface do not have electrolyte solution.
There are salts, scale, slag, etc. on the metal surface of the standby boiler, which will corrode if it comes into contact with O2 and CO2 in the air. This corrosion is much more severe than corrosion in operation. When the economizer is running, it is generally easy to be corroded in the inlet part, and if the standby boiler is not decorated, the entire pipeline will be corroded.
Superheaters generally do not corrode during operation, but they can occur when they are shut down, especially in the elbow section. The boiler water wall tube and steam drum are rarely subject to oxygen corrosion during operation, and are very prone to oxygen corrosion when they are stopped and standby.
Corrosion occurs when the standby is stopped, which increases the corrosion products in the water, and at the same time, these corrosion products such as Fe2O3, Cuo, etc. are corrosion promoters. This is an important cause of corrosion and fouling in operation. Therefore, it is necessary to pay attention to anti-corrosion for stopping the standby boiler.
-
Anonymous users2024-02-05Do not allow air to enter the water vapor system of the standby boiler.
Keep the metal surface of the standby boiler equipment fully dry.
A protective film or adsorption film with anti-corrosion effect is formed on the metal surface.
Soak the metal surface in an aqueous solution containing oxygen scavengers or other protective agents.
Fill the standby boiler equipment with inert gas.
-
Anonymous users2024-02-04Hello, I am very happy to serve you and give you the following answers: the long-term out-of-service pot Wang Chong furnace needs to take effective anti-corrosion protection measures to prevent corrosion and damage inside the boiler. 1.
First of all, the inside of the boiler should be cleaned to remove the accumulated dirt and oil to prevent corrosion. 2.Secondly, preservatives should be sprayed inside the boiler to prevent corrosion.
3.Again, preservatives should be sprayed on the outside of the boiler to prevent corrosion on the outside. 4.
Finally, the boiler should be enclosed to prevent contaminants from outside air from entering the inside of the boiler. Personal tips for troubled search: When the boiler is out of service for a long time, effective anti-corrosion protection measures should be taken to prevent corrosion and damage inside the boiler.
The boiler should be inspected regularly to ensure that it is in good condition.
-
Anonymous users2024-02-03Corrosion protection of boilers during shutdowns. The commonly used methods include eighteen amine furnace shutdown protection, nitrogen flushing protection, hot air drying and other methods. Eighteen amine furnace shutdown protection is to add the eighteen amine emulsion to the boiler to form a protective film, which plays a role in anti-corrosion.
-
Anonymous users2024-02-02Hello! Do not allow air to enter the water vapor system of the standby boiler.
Keep the metal surface of the standby boiler equipment fully dry.
A protective film or adsorption film with anti-corrosion effect is formed on the metal surface.
Soak the metal surface in an aqueous solution containing oxygen scavengers or other protective agents.
Fill the standby boiler equipment with inert gas.
It only represents a personal opinion, don't spray if you don't like it, thank you.
The basic principles of civil law mainly include the principle of equality, the principle of autonomy of will, the principle of fairness, the principle of good faith, the principle of public order and good customs, and the green principle. >>>More
The principles of the Work Safety Law are: 1. The principle of personal safety first; 2. The principle of prevention first; 3. The principle of consistency of rights and responsibilities; 4. The principle of social supervision and comprehensive management; 5. The principle of heavier punishment in accordance with the law. >>>More
GMP (good Manufacture Practice of Medical Products) is formulated to avoid contamination and cross-contamination in the drug production process to the greatest extent, reduce the occurrence of various errors, and is an important measure to improve the quality of drugs. >>>More
The basic principles and qualities of being a person and doing thingsThe first is not to steal, not to rob. Be upright and upright. Be polite when you speak. Don't hurt a person lightly. in order to show the quality of a person.
The basic principles of the contract are mainly as follows: 1. The principle of equality: the parties to the contract have equal legal status, and one party may not impose its will on the other party. >>>More